(b) Near the machine compartment: ``DANGER--Risk of   differ from fittings used in
                                                                     Fire or Explosion. Flammable Refrigerant Used. To    equipment or containers using
                                                                     Be Repaired Only By Trained Service Personnel. Do    non-flammable refrigerant.
                                                                     Not Puncture Refrigerant Tubing.''                   ``Differ'' means that either
                                                                    (c) Near the machine compartment: ``CAUTION--Risk     the diameter differs by at
                                                                     of Fire or Explosion. Flammable Refrigerant Used.    least \1/16\ inch or the
                                                                     Consult Repair Manual/Owner's Guide Before           thread direction is reversed
                                                                     Attempting To Service This Product. All Safety       (i.e., right-handed vs. left-
                                                                     Precautions Must be Followed.''                      handed). These different
                                                                    (d) On the exterior of the refrigerator: ``CAUTION--  fittings should be permanently
                                                                     Risk of Fire or Explosion. Dispose of Properly In    affixed to the unit at the
                                                                     Accordance With Federal Or Local Regulations.        point of service and
                                                                     Flammable Refrigerant Used.''                        maintained until the end-of-
                                                                    (e) Near any and all exposed refrigerant tubing:      life of the unit, and should
                                                                     ``CAUTION--Risk of Fire or Explosion Due To          not be accessed with an
                                                                     Puncture Of Refrigerant Tubing; Follow Handling      adaptor.
                                                                     Instructions Carefully. Flammable Refrigerant
                                                                     Used.'' All of these markings must be in letters
                                                                     no less than 6.4 mm (\1/4\ inch) high
                                                                    The refrigeration equipment must have red,
                                                                     Pantone[supreg] Matching System (PMS) #185 marked
                                                                     pipes, hoses, and other devices through which the
                                                                     refrigerant is serviced, typically known as the
                                                                     service port, to indicate the use of a flammable
                                                                     refrigerant. This color must be present at all
                                                                     service ports and where service puncturing or
                                                                     otherwise creating an opening from the refrigerant
                                                                     circuit to the atmosphere might be expected (e.g.,
                                                                     process tubes). The color mark must extend at
                                                                     least 2.5 centimeters (1 inch) from the compressor
                                                                     and must be replaced if removed.

7. Residential and light-       Propane (R-290)   Acceptable        These refrigerants may be used only in new           Applicable OSHA requirements at
 commercial air conditioning     R-441A.           subject to use    equipment specifically designed and clearly          29 CFR part 1910 must be
 and heat pumps--self-                             conditions.       identified for the refrigerants (i.e., none of       followed, including those at
 contained room air                                                  these substitutes may be used as a conversion or     29 CFR 1910.94 (ventilation)
 conditioners only (New                                              ``retrofit'' refrigerant for existing equipment      and 1910.106 (flammable and
 equipment only).                                                    designed for other refrigerants).                    combustible liquids), 1910.110
                                                                    These refrigerants may only be used in equipment      (storage and handling of
                                                                     that meets all requirements in Supplement SA and     liquefied petroleum gases),
                                                                     Appendices B through F of UL 484.1 2 4 In cases      1910.157 (portable fire
                                                                     where listing 7 or 8 includes requirements more      extinguishers), and 1910.1000
                                                                     stringent than those of UL 484, the appliance must   (toxic and hazardous
                                                                     meet the requirements of listing 7 or 8 of this      substances).
                                                                     table in place of the requirements in UL 484.       Proper ventilation should be
                                                                    The charge size for the entire air conditioner must   maintained at all times during
                                                                     not exceed the maximum refrigerant mass determined   the manufacture and storage of
                                                                     according to Appendix F of UL 484 for the room       equipment containing
                                                                     size where the air conditioner is used. The charge   hydrocarbon refrigerants
                                                                     size for these three refrigerants must in no case    through adherence to good
                                                                     exceed 1,000 g (35.3 oz or 2.21 lbs) of propane or   manufacturing practices as per
                                                                     1,000 g (35.3 oz or 2.21 lb) of R-441A. For          29 CFR 1910.106. If
                                                                     portable air conditioners, the charge size must in   refrigerant levels in the air
                                                                     no case exceed 300 g (10.6 oz or 0.66 lbs) of        surrounding the equipment rise
                                                                     propane or 330 g (11.6 oz or 0.72 lb) of R-441A.     above one-fourth of the lower
                                                                     The manufacturer must design a charge size for the   flammability limit, the space
                                                                     entire air conditioner that does not exceed the      should be evacuated and re-
                                                                     amount specified for the unit's cooling capacity,    entry should occur only after
                                                                     as specified in table A, B, C, D, or E of this       the space has been properly
                                                                     appendix R.                                          ventilated.
                                                                                Technicians and equipment
                                                                                manufacturers should wear
                                                                                appropriate personal
                                                                                protective equipment,
                                                                                including chemical goggles and
                                                                                protective gloves, when
                                                                                handling these refrigerants.
                                                                                Special care should be taken
                                                                                to avoid contact with the skin
                                                                                since these refrigerants, like
                                                                                many refrigerants, can cause
                                                                                freeze burns on the skin.
                                                                                A Class B dry powder type fire
                                                                                extinguisher should be kept
                                                                                nearby.
                                                                                Technicians should only use
                                                                                spark-proof tools when working
                                                                                on air conditioning equipment
                                                                                with flammable refrigerants.
                                                                                Any recovery equipment used
                                                                                should be designed for
                                                                                flammable refrigerants.
                                                                                Any refrigerant releases should
                                                                                be in a well-ventilated area,
                                                                                such as outside of a building.
                                                                                Only technicians specifically
                                                                                trained in handling flammable
                                                                                refrigerants should service
                                                                                refrigeration equipment
                                                                                containing these refrigerants.
                                                                                Technicians should gain an
                                                                                understanding of minimizing
                                                                                the risk of fire and the steps
                                                                                to use flammable refrigerants
                                                                                safely.

8. Residential and light-       Propane (R-290)R- Acceptable        As provided in clauses SA6.1.2 to SA6.1.5 of UL      Room occupants should evacuate
 commercial air conditioning     441A.             subject to use    484,1 2 4 the following markings must be attached    the space immediately
 and heat pumps--self-                             conditions.       at the locations provided and must be permanent:     following the accidental
 contained room air                                                 (a) On the outside of the air conditioner:            release of this refrigerant.
 conditioners only (New                                              ``DANGER--Risk of Fire or Explosion. Flammable      If a service port is added then
 equipment only).                                                    Refrigerant Used. To Be Repaired Only By Trained     air conditioning equipment
                                                                     Service Personnel. Do Not Puncture Refrigerant       using this refrigerant should
                                                                     Tubing.''                                            have service aperture fittings
                                                                    (b) On the outside of the air conditioner:            that differ from fittings used
                                                                     ``CAUTION--Risk of Fire or Explosion. Dispose of     in equipment or containers
                                                                     Properly In Accordance With Federal Or Local         using non-flammable
                                                                     Regulations. Flammable Refrigerant Used.''           refrigerant. ``Differ'' means
                                                                    (c) On the inside of the air conditioner near the     that either the diameter
                                                                     compressor: ``CAUTION--Risk of Fire or Explosion.    differs by at least 1/16 inch
                                                                     Flammable Refrigerant Used. Consult Repair Manual/   or the thread direction is
                                                                     Owner's Guide Before Attempting To Service This      reversed (i.e., right-handed
                                                                     Product. All Safety Precautions Must be              vs. left-handed). These
                                                                     Followed.''                                          different fittings should be
                                                                    (d) On the outside of each portable air               permanently affixed to the
                                                                     conditioner: ``WARNING: Appliance shall be           unit at the point of service
                                                                     installed, operated and stored in a room with a      and maintained until the end-
                                                                     floor area larger the ``X'' m\2\ (Y ft\2\).'' The    of-life of the unit, and
                                                                     value ``X'' on the label must be determined using    should not be accessed with an
                                                                     the minimum room size in m\2\ calculated using       adaptor.
                                                                     Appendix F of UL 484. For R-441A, use a lower       Air conditioning equipment in
                                                                     flammability limit of 0.041 kg/m\3\ in               this category includes:
                                                                     calculations in Appendix F of UL 484.               Window air conditioning units.
                                                                    All of these markings must be in letters no less     Portable room air conditioners.
                                                                     than 6.4 mm (\1/4\ inch) high.                      Packaged terminal air
                                                                    The air conditioning equipment must have red,         conditioners and heat pumps.
                                                                     Pantone[supreg] Matching System (PMS) #185 marked
                                                                     pipes, hoses, and other devices through which the
                                                                     refrigerant is serviced, typically known as the
                                                                     service port, to indicate the use of a flammable
                                                                     refrigerant. This color must be present at all
                                                                     service ports and where service puncturing or
                                                                     otherwise creating an opening from the refrigerant
                                                                     circuit to the atmosphere might be expected (e.g.,
                                                                     process tubes). The color mark must extend at
                                                                     least 2.5 centimeters (1 inch) from the compressor
                                                                     and must be replaced if removed.

9. Residential and light-       HFC-32..........  Acceptable        These refrigerants may be used only in new           Applicable OSHA requirements at
 commercial air conditioning                       subject to use    equipment specifically designed and clearly          29 CFR part 1910 must be
 and heat pumps--self-                             conditions.       identified for the refrigerants (i.e., none of       followed, including those at
 contained room air                                                  these substitutes may be used as a conversion or     29 CFR 1910.94 (ventilation)
 conditioners only.(New                                              ``retrofit'' refrigerant for existing equipment      and 1910.106 (flammable and
 equipment only) manufactured                                        designed for other refrigerants).                    combustible liquids), 1910.110
 on or after May 10, 2015 and                                       These refrigerants may only be used in equipment      (storage and handling of
 up to but not including [Date                                       that meets all requirements in Supplement SA and     liquefied petroleum gases),
 30 days after date of                                               Appendices B through F of UL 484.1 2 4 In cases      1910.157 (portable fire
 publication of the final rule                                       where listing 9 or 10 of this table includes         extinguishers), and 1910.1000
 in the Federal Register].                                           requirements more stringent than those of UL 484,    (toxic and hazardous
                                                                     the appliance must meet the requirements of          substances).
                                                                     listing 9 or 10 of this table in place of the       Proper ventilation should be
                                                                     requirements in UL 484.                              maintained at all times during
                                                                    The charge size for the entire air conditioner must   the manufacture and storage of
                                                                     not exceed the maximum refrigerant mass determined   equipment containing
                                                                     according to Appendix F of UL 484 for the room       hydrocarbon refrigerants
                                                                     size where the air conditioner is used. The charge   through adherence to good
                                                                     size for these three refrigerants must in no case    manufacturing practices as per
                                                                     exceed 1,000 g (35.3 oz or 2.21 lbs) of propane or   29 CFR 1910.106. If
                                                                     1,000 g (35.3 oz or 2.21 lb) of R-441A. For          refrigerant levels in the air
                                                                     portable air conditioners, the charge size must in   surrounding the equipment rise
                                                                     no case exceed 300 g (10.6 oz or 0.66 lbs) of        above one-fourth of the lower
                                                                     propane or 330 g (11.6 oz or 0.72 lb) of R-441A.     flammability limit, the space
                                                                     The manufacturer must design a charge size for the   should be evacuated and re-
                                                                     entire air conditioner that does not exceed the      entry should occur only after
                                                                     amount specified for the unit's cooling capacity,    the space has been properly
                                                                     as specified in table A, B, C, D, or E of this       ventilated.
                                                                     appendix.                                           Technicians and equipment
                                                                                manufacturers should wear
                                                                                appropriate personal
                                                                                protective equipment,
                                                                                including chemical goggles and
                                                                                protective gloves, when
                                                                                handling these refrigerants.
                                                                                Special care should be taken
                                                                                to avoid contact with the skin
                                                                                since these refrigerants, like
                                                                                many refrigerants, can cause
                                                                                freeze burns on the skin.
                                                                                A Class B dry powder type fire
                                                                                extinguisher should be kept
                                                                                nearby.
                                                                                Technicians should only use
                                                                                spark-proof tools when working
                                                                                on air conditioning equipment
                                                                                with flammable refrigerants.
                                                                                Any recovery equipment used
                                                                                should be designed for
                                                                                flammable refrigerants.
                                                                                Any refrigerant releases should
                                                                                be in a well-ventilated area,
                                                                                such as outside of a building.
                                                                                Only technicians specifically
                                                                                trained in handling flammable
                                                                                refrigerants should service
                                                                                refrigeration equipment
                                                                                containing these refrigerants.
                                                                                Technicians should gain an
                                                                                understanding of minimizing
                                                                                the risk of fire and the steps
                                                                                to use flammable refrigerants
                                                                                safely.

10. Residential and light-      HFC-32..........  Acceptable        As provided in clauses SA6.1.2 to SA6.1.5 of UL      Room occupants should evacuate
 commercial air conditioning                       subject to use    484,1 2 4 the following markings must be attached    the space immediately
 and heat pumps--self-                             conditions.       at the locations provided and must be permanent:     following the accidental
 contained room air                                                 (a) On the outside of the air conditioner:            release of this refrigerant.
 conditioners only. (New                                             ``DANGER--Risk of Fire or Explosion. Flammable      If a service port is added then
 equipment only) manufactured                                        Refrigerant Used. To Be Repaired Only By Trained     air conditioning equipment
 on or after May 10, 2015 and                                        Service Personnel. Do Not Puncture Refrigerant       using this refrigerant should
 up to but not including [Date                                       Tubing.''                                            have service aperture fittings
 30 days after date of                                              (b) On the outside of the air conditioner:            that differ from fittings used
 publication of the final rule                                       ``CAUTION--Risk of Fire or Explosion. Dispose of     in equipment or containers
 in the Federal Register].                                           Properly In Accordance With Federal Or Local         using non-flammable
                                                                     Regulations. Flammable Refrigerant Used.''           refrigerant. ``Differ'' means
                                                                    (c) On the inside of the air conditioner near the     that either the diameter
                                                                     compressor: ``CAUTION--Risk of Fire or Explosion.    differs by at least 1/16 inch
                                                                     Flammable Refrigerant Used. Consult Repair Manual/   or the thread direction is
                                                                     Owner's Guide Before Attempting To Service This      reversed (i.e., right-handed
                                                                     Product. All Safety Precautions Must be              vs. left-handed). These
                                                                     Followed.''                                          different fittings should be
                                                                    (d) On the outside of each portable air               permanently affixed to the
                                                                     conditioner: ``WARNING: Appliance shall be           unit at the point of service
                                                                     installed, operated and stored in a room with a      and maintained until the end-
                                                                     floor area larger the ``X'' m\2\ (Y ft\2\).'' The    of-life of the unit, and
                                                                     value ``X'' on the label must be determined using    should not be accessed with an
                                                                     the minimum room size in m\2\ calculated using       adaptor.
                                                                     Appendix F of UL 484. For R-441A, use a lower       Air conditioning equipment in
                                                                     flammability limit of 0.041 kg/m\3\ in               this category includes:
                                                                     calculations in Appendix F of UL 484.               Window air conditioning units.
                                                                    All of these markings must be in letters no less     Portable room air conditioners.
                                                                     than 6.4 mm (\1/4\ inch) high.                      Packaged terminal air
                                                                    The air conditioning equipment must have red,         conditioners and heat pumps.
                                                                     Pantone[supreg] Matching System (PMS) #185 marked
                                                                     pipes, hoses, and other devices through which the
                                                                     refrigerant is serviced, typically known as the
                                                                     service port, to indicate the use of a flammable
                                                                     refrigerant. This color must be present at all
                                                                     service ports and where service puncturing or
                                                                     otherwise creating an opening from the refrigerant
                                                                     circuit to the atmosphere might be expected (e.g.,
                                                                     process tubes). The color mark must extend at
                                                                     least 2.5 centimeters (1 inch) from the compressor
                                                                     and must be replaced if removed.
11. Residential and light-      HFC-32..........  Acceptable        This refrigerant may be used only in new equipment
 commercial air conditioning                       Subject to Use    specifically designed and clearly identified for
 and heat pumps--self-                             Conditions.       the refrigerant (i.e., this substitute may not be
 contained room air                                                  used as a conversion or ``retrofit'' refrigerant
 conditioners only. (New                                             for existing equipment designed for other
 equipment only) manufactured                                        refrigerants).
 on or after [Date 30 days
 after of publication of the
 final rule in the Federal
 Register].

                                                                    ...................................................
                                                                    This substitute may only be used in air
                                                                     conditioning equipment that meets all requirements
                                                                     in the UL 60335-2-40.1 2 7 In cases where this
                                                                     listing 11 includes requirements more stringent
                                                                     than those of UL 60335-2-40, the appliance must
                                                                     meet the requirements of this listing 11 in place
                                                                     of the requirements in UL 60335-2-40.
                                                                    The following markings must be attached at the
                                                                     locations provided and must be permanent:
                                                                    (a) On the outside of the equipment: ``WARNING--
                                                                     Risk of Fire. Flammable Refrigerant Used. To Be
                                                                     Repaired Only By Trained Service Personnel. Do Not
                                                                     Puncture Refrigerant Tubing.''
                                                                    (b) On the outside of the equipment: ``WARNING--
                                                                     Risk of Fire. Dispose of Properly In Accordance
                                                                     With Federal Or Local Regulations. Flammable
                                                                     Refrigerant Used.''
                                                                    (c) On the inside of the equipment near the
                                                                     compressor: ``WARNING--Risk of Fire. Flammable
                                                                     Refrigerant Used. Consult Repair Manual/Owner's
                                                                     Guide Before Attempting to Service This Product.
                                                                     All Safety Precautions Must be Followed.''
                                                                    (d) For any equipment pre-charged at the factory,
                                                                     on the equipment packaging or on the outside of
                                                                     the equipment: ``WARNING--Risk of Fire due to
                                                                     Flammable Refrigerant Used. Follow Handling
                                                                     Instructions Carefully in Compliance with National
                                                                     Regulations''
                                                                    a. If the equipment is delivered packaged, this
                                                                     label shall be applied on the packaging.

                                                                    ...................................................  Applicable OSHA requirements at
                                                                    b. If the equipment is not delivered packaged, this   29 CFR part 1910 must be
                                                                     label shall be applied on the outside of the         followed, including those at
                                                                     equipment near the control panel or nameplate.       29 CFR 1910.94 (ventilation)
                                                                    (e) On the equipment near the nameplate:              and 1910.106 (flammable and
                                                                    a. At the top of the marking: ``Minimum               combustible liquids), 1910.110
                                                                     Installation height, X m (W ft)''. This marking is   (storage and handling of
                                                                     only required if required by the UL 60335-2-40.      liquefied petroleum gases),
                                                                     The terms ``X'' and ``W'' shall be replaced by the   and 1910.1000 (toxic and
                                                                     numeric height as calculated per UL 60335-2-40.      hazardous substances).
                                                                     Note that the formatting here is slightly           Proper ventilation should be
                                                                     different than UL 60335-2-40; specifically, the      maintained at all times during
                                                                     height in Inch-Pound units is placed in              the manufacture and storage of
                                                                     parentheses and the word ``and'' has been replaced   equipment containing flammable
                                                                     by the opening parenthesis.                          refrigerants through adherence
                                                                    b. Immediately below marking (a) of this listing      to good manufacturing
                                                                     11or at the top of the marking if marking (a) is     practices as per 29 CFR
                                                                     not required: ``Minimum room area (operating or      1910.106. If refrigerant
                                                                     storage), Y m\2\ (Z ft\2\)''. The terms ``Y'' and    levels in the air surrounding
                                                                     ``Z'' shall be replaced by the numeric area as       the equipment rise above one-
                                                                     calculated per UL 60335-2-40. Note that the          fourth of the lower
                                                                     formatting here is slightly different than UL        flammability limit, the space
                                                                     60335-2-40; specifically, the area in Inch-Pound     should be evacuated, and
                                                                     units is placed in parentheses and the word          reentry should occur only
                                                                     ``and'' has been replaced by the opening             after the space has been
                                                                     parenthesis.                                         properly ventilated.
                                                                    (f) For non-fixed equipment, on the outside of the   Technicians and equipment
                                                                     product: ``WARNING--Risk of Fire or Explosion--      manufacturers should wear
                                                                     Store in a well-ventilated room without              appropriate personal
                                                                     continuously operating flames or other potential     protective equipment,
                                                                     ignition.''                                          including chemical goggles and
                                                                    (g) All of these markings must be in letters no       protective gloves, when
                                                                     less than 6.4 mm (\1/4\ inch) high.                  handling flammable
                                                                    The equipment must have red Pantone Matching System   refrigerants. Special care
                                                                     (PMS) #185 or RAL 3020 marked service ports,         should be taken to avoid
                                                                     pipes, hoses, or other devices through which the     contact with the skin which,
                                                                     refrigerant passes, to indicate the use of a         like many refrigerants, can
                                                                     flammable refrigerant. This color must be applied    cause freeze burns on the
                                                                     at all service ports and other parts of the system   skin.
                                                                     where service puncturing or other actions creating  A class B dry powder type fire
                                                                     an opening from the refrigerant circuit to the       extinguisher should be kept
                                                                     atmosphere might be expected and must extend a       nearby.
                                                                     minimum of one (1) inch (25mm) in both directions   Technicians should only use
                                                                     from such locations and shall be replaced if         spark-proof tools when working
                                                                     removed.                                             on air conditioning equipment
                                                                                with flammable refrigerants.
                                                                                Any recovery equipment used
                                                                                should be designed for
                                                                                flammable refrigerants. Only
                                                                                technicians specifically
                                                                                trained in handling flammable
                                                                                refrigerants should service
                                                                                refrigeration equipment
                                                                                containing this refrigerant.
                                                                                Technicians should gain an
                                                                                understanding of minimizing
                                                                                the risk of fire and the steps
                                                                                to use flammable refrigerants
                                                                                safely.
                                                                                Room occupants should evacuate
                                                                                the space immediately
                                                                                following the accidental
                                                                                release of this refrigerant.
                                                                                Personnel commissioning,
                                                                                maintaining, repairing,
                                                                                decommissioning and disposing
                                                                                of appliances with this
                                                                                refrigerant should obtain
                                                                                training and follow practices
                                                                                consistent with Annex HH of UL
                                                                                60335-2-40.2 7
                                                                                CAA section 608(c)(2) prohibits
                                                                                knowingly venting or otherwise
                                                                                knowingly releasing or
                                                                                disposing of substitute
                                                                                refrigerants in the course of
                                                                                maintaining, servicing,
                                                                                repairing or disposing of an
                                                                                appliance or industrial
                                                                                process refrigeration.
                                                                                Department of Transportation
                                                                                requirements for transport of
                                                                                flammable gases must be
                                                                                followed.
                                                                                Flammable refrigerants being
                                                                                recovered or otherwise
                                                                                disposed of from residential
                                                                                and light commercial air
                                                                                conditioning appliances are
                                                                                likely to be hazardous waste
                                                                                under the Resource
                                                                                Conservation and Recovery Act
                                                                                (RCRA) (see 40 CFR parts 260
                                                                                through 270).
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ The Director of the Federal Register approves this incorporation by reference (5 U.S.C. 552(a) and 1 CFR part 51). You may inspect a copy at the
  U.S. EPA or at the National Archives and Records Administration (NARA). Contact the U.S. EPA at: EPA Docket Center, WJC West Building, Room 3334, 1301
  Constitution Avenue NW, Washington, DC 20004, www.epa.gov/dockets,<PHONE_NUMBER>. For information on the availability of this material at NARA, email
  [email protected], or visit www.archives.gov/federal-register/cfr/ibr-locations.html.
\2\ You may obtain the material from: Underwriters Laboratories Inc. (UL) COMM 2000; 151 Eastern Avenue; Bensenville, IL 60106; email: 2000.com">[email protected]2000.com; phone: 1-888-853-3503 in the U.S. or Canada (other countries +1-415-352-2168); website: https://ulstandards.ul.com/ or www.comm-2000.com.
\3\ UL 471. Commercial Refrigerators and Freezers. 10th edition. Supplement SB: Requirements for Refrigerators and Freezers Employing a Flammable
  Refrigerant in the Refrigerating System. November 24, 2010.
\4\ UL 484. Room Air Conditioners. 8th edition. Supplement SA: Requirements for Room Air Conditioners Employing a Flammable Refrigerant in the
  Refrigerating System and Appendices B through F. December 21, 2007, with changes through August 3, 2012.

\5\ UL 541. Refrigerated Vending Machines. 7th edition. Supplement SA: Requirements for Refrigerated Venders Employing a Flammable Refrigerant in the
  Refrigerating System. December 30, 2011.
\6\ UL 60335-2-24. Standard for Safety: Requirements for Household and Similar Electrical Appliances--Safety--Part 2-24: Particular Requirements for
  Refrigerating Appliances, Ice-Cream Appliances and Ice-Makers, Second edition, dated April 28, 2017.
\7\ UL 60335-2-40, Standard for Household And Similar Electrical Appliances--Safety--Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-
  Conditioners and Dehumidifiers, 3rd edition, Dated November 1, 2019.

* * * * *
0
3. Add appendix X to subpart G of part 82 to read as follows:

Appendix X to Subpart G of Part 82--Substitutes Listed in the [Date of
Publication of the Final Rule in the Federal Register] Final Rule--
Effective [Date 30 Days After Date of Publication of the Final Rule in
the Federal Register]

                                           Refrigerants--Substitutes Acceptable Subject to Narrowed Use Limits
--------------------------------------------------------------------------------------------------------------------------------------------------------
             End-use                     Substitute              Decision                Narrowed use limits                  Further information
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. Very low temperature            R-1150................  Acceptable Subject     Temperature range--R-1150
 refrigeration (new only).                                  to Use Conditions     may only be used in equipment
                                                            and Narrowed Use      designed specifically to reach
                                                            Limits.               temperatures lower than -80 [deg]C
                                                                                (-112 [deg]F).
                                                                                The manufacturers of new
                                                                                very low temperature equipment
                                                                                would need to demonstrate that
                                                                                other alternatives are not
                                                                                technically feasible. They must
                                                                                document the results of their
                                                                                evaluation that showed the other
                                                                                alternatives to be not technically
                                                                                feasible and maintain that
                                                                                documentation in their files. This
                                                                                documentation, which does not need
                                                                                to be submitted to EPA unless
                                                                                requested to demonstrate
                                                                                compliance, ``shall include
                                                                                descriptions of substitutes
                                                                                examined and rejected, processes
                                                                                or products in which the
                                                                                substitute is needed, reason for
                                                                                rejection of other alternatives,
                                                                                e.g., performance, technical or
                                                                                safety standards, and the
                                                                                anticipated date other substitutes
                                                                                will be available and projected
                                                                                time for switching to other
                                                                                available substitutes.'' ( Sec.
                                                                                82.180(b)(3)).
--------------------------------------------------------------------------------------------------------------------------------------------------------

                                             Refrigerants--Substitutes Acceptable Subject to Use Conditions
--------------------------------------------------------------------------------------------------------------------------------------------------------
           End-use                 Substitute          Decision                    Use conditions                          Further information
--------------------------------------------------------------------------------------------------------------------------------------------------------
1. Centrifugal Chillers for    HFO-1234yf,         Acceptable        These refrigerants may be used only in     Applicable OSHA requirements at 29 CFR
 comfort cooling and           R-454A,...........   Subject to Use    new equipment specifically designed and    part 1910 must be followed, including
 Industrial Process Air        R-454B,...........   Conditions.       clearly identified for the refrigerant     those at 29 CFR 1910.94 (ventilation)
 Conditioning Positive         R-454C............                     (i.e., none of these substitutes may be    and 1910.106 (flammable and combustible
 Displacement Chillers for                                            used as a conversion or ``retrofit''       liquids), 1910.110 (storage and
 comfort cooling and                                                  refrigerant for existing equipment         handling of liquefied petroleum gases),
 Industrial Process Air                                               designed for other refrigerants).          and 1910.1000 (toxic and hazardous
 Conditioning.                                                       These substitutes may only be used in air   substances).
                                                                      conditioning equipment that meets all     Proper ventilation should be maintained
                                                                      requirements in UL 60335-2-40.1 3 5 In     at all times during the manufacture and
                                                                      cases where this listing 1 includes        storage of equipment containing
                                                                      requirements more stringent than those     flammable refrigerants through
                                                                      of UL 60335-2-40, the appliance must       adherence to good manufacturing
                                                                      meet the requirements of this listing 1    practices as per 29 CFR 1910.106. If
                                                                      in place of the requirements in the UL     refrigerant levels in the air
                                                                      60335-2-40.                                surrounding the equipment rise above
                                                                     These refrigerants may be used in           one-fourth of the lower flammability
                                                                      chillers if and only if such chiller       limit, the space should be evacuated,
                                                                      meets all requirements listed in ASHRAE    and reentry should occur only after the
                                                                      15-2019.1 2 4 In cases where this          space has been properly ventilated.
                                                                      listing 1 includes requirements           Technicians and equipment manufacturers
                                                                      different than those of ASHRAE 15-2019,    should wear appropriate personal
                                                                      the appliance must meet the requirements   protective equipment, including
                                                                      of this listing 1 in place of the          chemical goggles and protective gloves,
                                                                      requirements in ASHRAE 15-2019. Where      when handling flammable refrigerants.
                                                                      similar requirements of ASHRAE 15-2019     Special care should be taken to avoid
                                                                      and UL 60335-2-40 differ, the more         contact with the skin which, like many
                                                                      stringent or conservative condition        refrigerants, can cause freeze burns on
                                                                      shall apply unless superseded by this      the skin.
                                                                      listing 1.

                                                                     The following markings must be attached    A class B dry powder type fire
                                                                      at the locations provided and must be      extinguisher should be kept nearby.
                                                                      permanent:                                Technicians should only use spark-proof
                                                                     (a) On the outside of the equipment:        tools when working on air conditioning
                                                                      ``WARNING--Risk of Fire. Flammable         equipment with flammable refrigerants.
                                                                      Refrigerant Used. To Be Repaired Only By  Any recovery equipment used should be
                                                                      Trained Service Personnel. Do Not          designed for flammable refrigerants.
                                                                      Puncture Refrigerant Tubing.''.            Only technicians specifically trained
                                                                     (b) On the outside of the equipment:        in handling flammable refrigerants
                                                                      ``WARNING--Risk of Fire. Dispose of        should service refrigeration equipment
                                                                      Properly In Accordance With Federal Or     containing this refrigerant.
                                                                      Local Regulations. Flammable Refrigerant   Technicians should gain an
                                                                      Used.''.                                   understanding of minimizing the risk of
                                                                     (c) On the inside of the equipment near     fire and the steps to use flammable
                                                                      the compressor: ``WARNING--Risk of Fire.   refrigerants safely.
                                                                      Flammable Refrigerant Used. Consult       Room occupants should evacuate the space
                                                                      Repair Manual/Owner's Guide Before         immediately following the accidental
                                                                      Attempting to Service This Product. All    release of this refrigerant.
                                                                      Safety Precautions Must be Followed.''.   Personnel commissioning, maintaining,
                                                                     (d) For any equipment pre-charged at the    repairing, decommissioning and
                                                                      factory, on the equipment packaging or     disposing of appliances with this
                                                                      on the outside of the equipment:           refrigerant should obtain training and
                                                                      ``WARNING--Risk of Fire due to Flammable   follow practices consistent with Annex
                                                                      Refrigerant Used. Follow Handling          HH of UL 60335-2-40, 3rd edition.3 5
                                                                      Instructions Carefully in Compliance      CAA section 608(c)(2) prohibits
                                                                      with National Regulations''.               knowingly venting or otherwise
                                                                     a. If the equipment is delivered            knowingly releasing or disposing of
                                                                      packaged, this label shall be applied on   substitute refrigerants in the course
                                                                      the packaging.                             of maintaining, servicing, repairing or
                                                                     b. If the equipment is not delivered        disposing of an appliance or industrial
                                                                      packaged, this label shall be applied on   process refrigeration.
                                                                      the outside of the equipment near the     Department of Transportation
                                                                      control panel or nameplate.                requirements for transport of flammable
                                                                     (e) On the equipment near the nameplate:.   gases must be followed.
                                                                     a. At the top of the marking: ``Minimum    Flammable refrigerants being recovered
                                                                      Installation Height, X m (W ft)''. This    or otherwise disposed of from
                                                                      marking is only required if required by    residential and light commercial air
                                                                      UL 60335-2-40. The terms ``X'' and ``W''   conditioning appliances are likely to
                                                                      shall be replaced by the numeric height    be hazardous waste under the Resource
                                                                      as calculated per UL 60335-2-40. Note      Conservation and Recovery Act (RCRA)
                                                                      that the formatting here is slightly       (see 40 CFR parts 260 through 270).
                                                                      different than UL 60335-2-40;
                                                                      specifically, the height in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                     b. Immediately below marking (a) of this
                                                                      listing 1or at the top of the marking if
                                                                      marking (a) is not required: ``Minimum
                                                                      room area (operating or storage), Y m\2\
                                                                      (Z ft\2\)''. The terms ``Y'' and ``Z''
                                                                      shall be replaced by the numeric area as
                                                                      calculated per UL 60335-2-40. Note that
                                                                      the formatting here is slightly
                                                                      different than UL 60335-2-40;
                                                                      specifically, the area in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                        (f) For non-fixed equipment, on the
                                                                         outside of the product: ``WARNING--
                                                                         Risk of Fire or Explosion--Store in a
                                                                         well-ventilated room without
                                                                         continuously operating flames or
                                                                         other potential ignition.''.
                                                                     (g) For fixed equipment that is ducted,
                                                                      including chillers, near the nameplate:
                                                                      ``WARNING--Risk of Fire--Auxiliary
                                                                      devices which may be ignition sources
                                                                      shall not be installed in the ductwork,
                                                                      other than auxiliary devices listed for
                                                                      use with the specific appliance. See
                                                                      instructions.''.
                                                                        (h) All of these markings must be in
                                                                         letters no less than 6.4 mm (\1/4\
                                                                         inch) high.
                                                                     The equipment must have red Pantone
                                                                      Matching System (PMS) #185 or RAL 3020
                                                                      marked service ports, pipes, hoses, or
                                                                      other devices through which the
                                                                      refrigerant passes, to indicate the use
                                                                      of a flammable refrigerant. This color
                                                                      must be applied at all service ports and
                                                                      other parts of the system where service
                                                                      puncturing or other actions creating an
                                                                      opening from the refrigerant circuit to
                                                                      the atmosphere might be expected and
                                                                      must extend a minimum of one (1) inch
                                                                      (25mm) in both directions from such
                                                                      locations and shall be replaced if
                                                                      removed.

2. Positive Displacement       HFC-32, R-452B....  Acceptable        These refrigerants may be used only in     Applicable OSHA requirements at 29 CFR
 chillers for comfort cooling                       Subject to Use    new equipment specifically designed and    part 1910 must be followed, including
 using a rotary or scroll                           Conditions.       clearly identified for the refrigerant     those at 29 CFR 1910.94 (ventilation)
 compressor and Industrial                                            (i.e., none of these substitutes may be    and 1910.106 (flammable and combustible
 Process Air Conditioning                                             used as a conversion or ``retrofit''       liquids), 1910.110 (storage and
 using a chiller with a                                               refrigerant for existing equipment         handling of liquefied petroleum gases),
 rotary or scroll compressor.                                         designed for other refrigerants).          and 1910.1000 (toxic and hazardous
                                                                     These substitutes may only be used in air   substances).
                                                                      conditioning equipment that meets all     Proper ventilation should be maintained
                                                                      requirements in UL 60335-2-40.1 2 3 In     at all times during the manufacture and
                                                                      cases where this listing 2 includes        storage of equipment containing
                                                                      requirements more stringent than those     flammable refrigerants through
                                                                      of UL 60335-2-40, the appliance must       adherence to good manufacturing
                                                                      meet the requirements of this listing 2    practices as per 29 CFR 1910.106. If
                                                                      in place of the requirements in UL 60335-  refrigerant levels in the air
                                                                      2-40.                                      surrounding the equipment rise above
                                                                     These refrigerants may be used in           one-fourth of the lower flammability
                                                                      chillers if and only if such chiller       limit, the space should be evacuated,
                                                                      meets all requirements listed in ASHRAE    and reentry should occur only after the
                                                                      15-2019.\1\ In cases where this listing    space has been properly ventilated.
                                                                      2 includes requirements different than    Technicians and equipment manufacturers
                                                                      those of ASHRAE 15-2019, the appliance     should wear appropriate personal
                                                                      must meet the requirements of this         protective equipment, including
                                                                      listing 2 in place of the requirements     chemical goggles and protective gloves,
                                                                      in ASHRAE 15-2019. Where similar           when handling flammable refrigerants.
                                                                      requirements of ASHRAE 15-2019 and UL      Special care should be taken to avoid
                                                                      60335-2-40 differ, the more stringent or   contact with the skin which, like many
                                                                      conservative condition shall apply         refrigerants, can cause freeze burns on
                                                                      unless superseded by this listing.         the skin.
                                                                     The following markings must be attached    A class B dry powder type fire
                                                                      at the locations provided and must be      extinguisher should be kept nearby.
                                                                      permanent:                                Technicians should only use spark-proof
                                                                     (a) On the outside of the equipment:        tools when working on air conditioning
                                                                      ``WARNING--Risk of Fire. Flammable         equipment with flammable refrigerants.
                                                                      Refrigerant Used. To Be Repaired Only By  Any recovery equipment used should be
                                                                      Trained Service Personnel. Do Not          designed for flammable refrigerants.
                                                                      Puncture Refrigerant Tubing.''.            Only technicians specifically trained
                                                                     (b) On the outside of the equipment:        in handling flammable refrigerants
                                                                      ``WARNING--Risk of Fire. Dispose of        should service refrigeration equipment
                                                                      Properly In Accordance With Federal Or     containing this refrigerant.
                                                                      Local Regulations. Flammable Refrigerant   Technicians should gain an
                                                                      Used.''.                                   understanding of minimizing the risk of
                                                                     (c) On the inside of the equipment near     fire and the steps to use flammable
                                                                      the compressor: ``WARNING--Risk of Fire.   refrigerants safely.
                                                                      Flammable Refrigerant Used. Consult       Room occupants should evacuate the space
                                                                      Repair Manual/Owner's Guide Before         immediately following the accidental
                                                                      Attempting to Service This Product. All    release of this refrigerant.
                                                                      Safety Precautions Must be Followed.''.   Personnel commissioning, maintaining,
                                                                     (d) For any equipment pre-charged at the    repairing, decommissioning and
                                                                      factory, on the equipment packaging or     disposing of appliances with this
                                                                      on the outside of the equipment:           refrigerant should obtain training and
                                                                      ``WARNING--Risk of Fire due to Flammable   follow practices consistent with Annex
                                                                      Refrigerant Used. Follow Handling          HH of UL 60355-2-40.3 5
                                                                      Instructions Carefully in Compliance      CAA section 608(c)(2) prohibits
                                                                      with National Regulations''.               knowingly venting or otherwise
                                                                     a. If the equipment is delivered            knowingly releasing or disposing of
                                                                      packaged, this label shall be applied on   substitute refrigerants in the course
                                                                      the packaging.                             of maintaining, servicing, repairing or
                                                                     b. If the equipment is not delivered        disposing of an appliance or industrial
                                                                      packaged, this label shall be applied on   process refrigeration.
                                                                      the outside of the equipment near the     Department of Transportation
                                                                      control panel or nameplate.                requirements for transport of flammable
                                                                                gases must be followed.
                                                                                Flammable refrigerants being recovered
                                                                                or otherwise disposed of from
                                                                                residential and light commercial air
                                                                                conditioning appliances are likely to
                                                                                be hazardous waste under the Resource
                                                                                Conservation and Recovery Act (RCRA)
                                                                                (see 40 CFR parts 260 through 270).

                                                                        (e) On the equipment near the
                                                                         nameplate:.
                                                                     a. At the top of the marking: ``Minimum
                                                                      Installation height, X m (W ft)''. This
                                                                      marking is only required if required by
                                                                      UL 60335-2-40. The terms ``X'' and ``W''
                                                                      shall be replaced by the numeric height
                                                                      as calculated per UL 60335-2-40. Note
                                                                      that the formatting here is slightly
                                                                      different than UL 60335-2-40;
                                                                      specifically, the height in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                     b. Immediately below marking (a) or at
                                                                      the top of the marking if marking (a) is
                                                                      not required: ``Minimum room area
                                                                      (operating or storage), Y m\2\ (Z
                                                                      ft\2\)''. The terms ``Y'' and ``Z''
                                                                      shall be replaced by the numeric area as
                                                                      calculated per UL 60335-2-40. Note that
                                                                      the formatting here is slightly
                                                                      different than UL 60335-2-40;
                                                                      specifically, the area in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                     (f) For non-fixed equipment, on the
                                                                      outside of the product: ``WARNING--Risk
                                                                      of Fire or Explosion--Store in a well-
                                                                      ventilated room without continuously
                                                                      operating flames or other potential
                                                                      ignition.''.
                                                                     (g) For fixed equipment that is ducted,
                                                                      including chillers, near the nameplate:
                                                                      ``WARNING--Risk of Fire--Auxiliary
                                                                      devices which may be ignition sources
                                                                      shall not be installed in the ductwork,
                                                                      other than auxiliary devices listed for
                                                                      use with the specific appliance. See
                                                                      instructions.''.
                                                                     (h) All of these markings must be in
                                                                      letters no less than 6.4 mm (\1/4\ inch)
                                                                      high.
                                                                     The equipment must have red Pantone
                                                                      Matching System (PMS) #185 or RAL 3020
                                                                      marked service ports, pipes, hoses, or
                                                                      other devices through which the
                                                                      refrigerant passes, to indicate the use
                                                                      of a flammable refrigerant. This color
                                                                      must be applied at all service ports and
                                                                      other parts of the system where service
                                                                      puncturing or other actions creating an
                                                                      opening from the refrigerant circuit to
                                                                      the atmosphere might be expected and
                                                                      must extend a minimum of one (1) inch
                                                                      (25mm) in both directions from such
                                                                      locations and shall be replaced if
                                                                      removed.

3. Residential Dehumidifiers.  HFO-1234yf, HFC-    Acceptable        These refrigerants may be used only in     Applicable OSHA requirements at 29 CFR
                                32,                 Subject to Use    new equipment specifically designed and    part 1910 must be followed, including
                               R-452B,...........   Conditions.       clearly identified for the refrigerant     those at 29 CFR 1910.94 (ventilation)
                               R-454A,...........                     (i.e., none of these substitutes may be    and 1910.106 (flammable and combustible
                               R-454B, and.......                     used as a conversion or ``retrofit''       liquids), 1910.110 (storage and
                               R-454C............                     refrigerant for existing equipment         handling of liquefied petroleum gases),
                                                                      designed for other refrigerants).          and 1910.1000 (toxic and hazardous
                                                                     These substitutes may only be used in       substances).
                                                                      dehumidifier equipment that meets all     Proper ventilation should be maintained
                                                                      requirements in UL 60335-2-40.1 3 5 In     at all times during the manufacture and
                                                                      cases where this listing 3 includes        storage of equipment containing
                                                                      requirements more stringent than those     flammable refrigerants through
                                                                      of UL 60335-2-40, the appliance must       adherence to good manufacturing
                                                                      meet the requirements of this listing 3    practices as per 29 CFR 1910.106. If
                                                                      in place of the requirements in UL 60335-  refrigerant levels in the air
                                                                      2-40.                                      surrounding the equipment rise above
                                                                     The following markings must be attached     one-fourth of the lower flammability
                                                                      at the locations provided and must be      limit, the space should be evacuated,
                                                                      permanent:.                                and reentry should occur only after the
                                                                     (a) On the outside of the equipment:        space has been properly ventilated.
                                                                      ``WARNING--Risk of Fire. Flammable        Technicians and equipment manufacturers
                                                                      Refrigerant Used. To Be Repaired Only By   should wear appropriate personal
                                                                      Trained Service Personnel. Do Not          protective equipment, including
                                                                      Puncture Refrigerant Tubing.''.            chemical goggles and protective gloves,
                                                                     (b) On the outside of the equipment:        when handling flammable refrigerants.
                                                                      ``WARNING--Risk of Fire. Dispose of        Special care should be taken to avoid
                                                                      Properly In Accordance With Federal Or     contact with the skin which, like many
                                                                      Local Regulations. Flammable Refrigerant   refrigerants, can cause freeze burns on
                                                                      Used.''.                                   the skin.
                                                                     (c) On the inside of the equipment near    A class B dry powder type fire
                                                                      the compressor: ``WARNING--Risk of Fire.   extinguisher should be kept nearby.
                                                                      Flammable Refrigerant Used. Consult       Technicians should only use spark-proof
                                                                      Repair Manual/Owner's Guide Before         tools when working on air conditioning
                                                                      Attempting to Service This Product. All    equipment with flammable refrigerants.
                                                                      Safety Precautions Must be Followed.''.   Any recovery equipment used should be
                                                                     (d) For any equipment pre-charged at the    designed for flammable refrigerants.
                                                                      factory, on the equipment packaging or     Only technicians specifically trained
                                                                      on the outside of the equipment:           in handling flammable refrigerants
                                                                      ``WARNING--Risk of Fire due to Flammable   should service refrigeration equipment
                                                                      Refrigerant Used. Follow Handling          containing this refrigerant.
                                                                      Instructions Carefully in Compliance       Technicians should gain an
                                                                      with National Regulations''.               understanding of minimizing the risk of
                                                                     a. If the equipment is delivered            fire and the steps to use flammable
                                                                      packaged, this label shall be applied on   refrigerants safely.
                                                                      the packaging.                            Room occupants should evacuate the space
                                                                     b. If the equipment is not delivered        immediately following the accidental
                                                                      packaged, this label shall be applied on   release of this refrigerant.
                                                                      the outside of the equipment near the     Personnel commissioning, maintaining,
                                                                      control panel or nameplate.                repairing, decommissioning and
                                                                     (e) On the equipment near the nameplate:.   disposing of appliances with this
                                                                     a. At the top of the marking: ``Minimum     refrigerant should obtain training and
                                                                      Installation Height, X m (W ft)''. This    follow practices consistent with Annex
                                                                      marking is only required if required by    HH of UL 60335-2-40.3 5
                                                                      UL 60335-2-40. The terms ``X'' and ``W''  CAA section 608(c)(2) prohibits
                                                                      shall be replaced by the numeric height    knowingly venting or otherwise
                                                                      as calculated per UL 60335-2-40. Note      knowingly releasing or disposing of
                                                                      that the formatting here is slightly       substitute refrigerants in the course
                                                                      different than UL 60335-2-40;              of maintaining, servicing, repairing or
                                                                      specifically, the height in Inch-Pound     disposing of an appliance or industrial
                                                                      units is placed in parentheses and the     process refrigeration.
                                                                      word ``and'' has been replaced by the     Department of Transportation
                                                                      opening parenthesis.                       requirements for transport of flammable
                                                                     b. Immediately below marking (a) of this    gases must be followed.
                                                                      listing 3or at the top of the marking if  Flammable refrigerants being recovered
                                                                      marking (a) is not required: ``Minimum     or otherwise disposed of from
                                                                      room area (operating or storage), Y m\2\   residential and light commercial air
                                                                      (Z ft\2\)''. The terms ``Y'' and ``Z''     conditioning appliances are likely to
                                                                      shall be replaced by the numeric area as   be hazardous waste under the Resource
                                                                      calculated per UL 60335-2-40. Note that    Conservation and Recovery Act (RCRA)
                                                                      the formatting here is slightly            (see 40 CFR parts 260 through 270).
                                                                      different than UL 60335-2-40;
                                                                      specifically, the area in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                     (f) On the outside of the product:
                                                                      ``WARNING--Risk of Fire or Explosion--
                                                                      Store in a well-ventilated room without
                                                                      continuously operating flames or other
                                                                      potential ignition.''.
                                                                     (g) All of these markings must be in
                                                                      letters no less than 6.4 mm (\1/4\ inch)
                                                                      high.
                                                                     The equipment must have red Pantone
                                                                      Matching System (PMS) #185 or RAL 3020
                                                                      marked service ports, pipes, hoses, or
                                                                      other devices through which the
                                                                      refrigerant passes, to indicate the use
                                                                      of a flammable refrigerant. This color
                                                                      must be applied at all service ports and
                                                                      other parts of the system where service
                                                                      puncturing or other actions creating an
                                                                      opening from the refrigerant circuit to
                                                                      the atmosphere might be expected and
                                                                      must extend a minimum of one (1) inch
                                                                      (25mm) in both directions from such
                                                                      locations and shall be replaced if
                                                                      removed.

4. Non-residential             HFC-32............  Acceptable        This refrigerant may be used only in new
 Dehumidifiers.                                     Subject to Use    equipment specifically designed and
                                                    Conditions.       clearly identified for the refrigerant
                                                                      (i.e., this substitute may not be used
                                                                      as a conversion or ``retrofit''
                                                                      refrigerant for existing equipment
                                                                      designed for other refrigerants).
                                                                     This substitute may only be used in        Applicable OSHA requirements at 29 CFR
                                                                      dehumidifier equipment that meets all      part 1910 must be followed, including
                                                                      requirements in UL 60335-2-40.1 3 5 In     those at 29 CFR 1910.94 (ventilation)
                                                                      cases where this listing 4 includes        and 1910.106 (flammable and combustible
                                                                      requirements more stringent than those     liquids), 1910.110 (storage and
                                                                      of UL 60335-2-40, the appliance must       handling of liquefied petroleum gases),
                                                                      meet the requirements of this listing 4    and 1910.1000 (toxic and hazardous
                                                                      in place of the requirements in UL 60335-  substances).
                                                                      2-40.                                     Proper ventilation should be maintained
                                                                     The following markings must be attached     at all times during the manufacture and
                                                                      at the locations provided and must be      storage of equipment containing
                                                                      permanent:.                                flammable refrigerants through
                                                                     (a) On the outside of the equipment:        adherence to good manufacturing
                                                                      ``WARNING--Risk of Fire. Flammable         practices as per 29 CFR 1910.106. If
                                                                      Refrigerant Used. To Be Repaired Only By   refrigerant levels in the air
                                                                      Trained Service Personnel. Do Not          surrounding the equipment rise above
                                                                      Puncture Refrigerant Tubing.''.            one-fourth of the lower flammability
                                                                     (b) On the outside of the equipment:        limit, the space should be evacuated,
                                                                      ``WARNING--Risk of Fire. Dispose of        and reentry should occur only after the
                                                                      Properly In Accordance With Federal Or     space has been properly ventilated.
                                                                      Local Regulations. Flammable Refrigerant  Technicians and equipment manufacturers
                                                                      Used.''.                                   should wear appropriate personal
                                                                     (c) On the inside of the equipment near     protective equipment, including
                                                                      the compressor: ``WARNING--Risk of Fire.   chemical goggles and protective gloves,
                                                                      Flammable Refrigerant Used. Consult        when handling flammable refrigerants.
                                                                      Repair Manual/Owner's Guide Before         Special care should be taken to avoid
                                                                      Attempting to Service This Product. All    contact with the skin which, like many
                                                                      Safety Precautions Must be Followed.''.    refrigerants, can cause freeze burns on
                                                                     (d) For any equipment pre-charged at the    the skin.
                                                                      factory, on the equipment packaging or    A class B dry powder type fire
                                                                      on the outside of the equipment:           extinguisher should be kept nearby.
                                                                      ``WARNING--Risk of Fire due to Flammable  Technicians should only use spark-proof
                                                                      Refrigerant Used. Follow Handling          tools when working on air conditioning
                                                                      Instructions Carefully in Compliance       equipment with flammable refrigerants.
                                                                      with National Regulations''.              Any recovery equipment used should be
                                                                     a. If the equipment is delivered            designed for flammable refrigerants.
                                                                      packaged, this label shall be applied on   Only technicians specifically trained
                                                                      the packaging.                             in handling flammable refrigerants
                                                                     b. If the equipment is not delivered        should service refrigeration equipment
                                                                      packaged, this label shall be applied on   containing this refrigerant.
                                                                      the outside of the equipment near the      Technicians should gain an
                                                                      control panel or nameplate.                understanding of minimizing the risk of
                                                                     (e) On the equipment near the nameplate:.   fire and the steps to use flammable
                                                                                refrigerants safely.
                                                                                Room occupants should evacuate the space
                                                                                immediately following the accidental
                                                                                release of this refrigerant.
                                                                                Personnel commissioning, maintaining,
                                                                                repairing, decommissioning and
                                                                                disposing of appliances with this
                                                                                refrigerant should obtain training and
                                                                                follow practices consistent with Annex
                                                                                HH of UL 6035-2-40.3 5
                                                                                CAA section 608(c)(2) prohibits
                                                                                knowingly venting or otherwise
                                                                                knowingly releasing or disposing of
                                                                                substitute refrigerants in the course
                                                                                of maintaining, servicing, repairing or
                                                                                disposing of an appliance or industrial
                                                                                process refrigeration.
                                                                                Department of Transportation
                                                                                requirements for transport of flammable
                                                                                gases must be followed.
                                                                                Flammable refrigerants being recovered
                                                                                or otherwise disposed of from
                                                                                residential and light commercial air
                                                                                conditioning appliances are likely to
                                                                                be hazardous waste under the Resource
                                                                                Conservation and Recovery Act (RCRA)
                                                                                (see 40 CFR parts 260 through 270).

                                                                          a. At the top of the marking:
                                                                           ``Minimum Installation Height, X m
                                                                           (W ft)''. This marking is only
                                                                           required if required by UL 60335-2-
                                                                           40. The terms ``X'' and ``W'' shall
                                                                           be replaced by the numeric height
                                                                           as calculated per UL 60335-2-40.
                                                                           Note that the formatting here is
                                                                           slightly different than UL 60335-2-
                                                                           40; specifically, the height in
                                                                           Inch-Pound units is placed in
                                                                           parentheses and the word ``and''
                                                                           has been replaced by the opening
                                                                           parenthesis.
                                                                     b. Immediately below marking (a) of this
                                                                      listing 4 or at the top of the marking
                                                                      if marking (a) is not required:
                                                                      ``Minimum room area (operating or
                                                                      storage), Y m\2\ (Z ft\2\)''. The terms
                                                                      ``Y'' and ``Z'' shall be replaced by the
                                                                      numeric area as calculated per UL 60335-
                                                                      2-40. Note that the formatting here is
                                                                      slightly different than UL 60335-2-40;
                                                                      specifically, the area in Inch-Pound
                                                                      units is placed in parentheses and the
                                                                      word ``and'' has been replaced by the
                                                                      opening parenthesis.
                                                                     (f) On the outside of the product:
                                                                      ``WARNING--Risk of Fire or Explosion--
                                                                      Store in a well-ventilated room without
                                                                      continuously operating flames or other
                                                                      potential ignition.''.
                                                                     (g) All of these markings must be in
                                                                      letters no less than 6.4 mm (\1/4\ inch)
                                                                      high.
                                                                     The equipment must have red Pantone
                                                                      Matching System (PMS) #185 or RAL 3020
                                                                      marked service ports, pipes, hoses, or
                                                                      other devices through which the
                                                                      refrigerant passes, to indicate the use
                                                                      of a flammable refrigerant. This color
                                                                      must be applied at all service ports and
                                                                      other parts of the system where service
                                                                      puncturing or other actions creating an
                                                                      opening from the refrigerant circuit to
                                                                      the atmosphere might be expected and
                                                                      must extend a minimum of one (1) inch
                                                                      (25mm) in both directions from such
                                                                      locations and shall be replaced if
                                                                      removed.

5. Very Low Temperature        R-1150............  Acceptable        R-1150 may be used only in new equipment   Applicable OSHA requirements at 29 CFR
 Refrigeration.                                     Subject to Use    specifically designed and clearly          part 1910 must be followed, including
                                                    Conditions.       identified for the refrigerant (i.e.,      those at 29 CFR 1910.94 (ventilation)
                                                                      none of these substitutes may be used as   and 1910.106 (flammable and combustible
                                                                      a conversion or ``retrofit'' refrigerant   liquids), 1910.110 (storage and
                                                                      for existing equipment designed for        handling of liquefied petroleum gases),
                                                                      other refrigerants).                       and 1910.1000 (toxic and hazardous
                                                                     R-1150 may only be used in laboratory       substances).
                                                                      equipment that meet all requirements in   Proper ventilation should be maintained
                                                                      UL 61010-2-011.1 3 6 In cases where this   at all times during the manufacture and
                                                                      listing 5 includes requirements more       storage of equipment containing
                                                                      stringent than those of UL 61010-2-011,    flammable refrigerants through
                                                                      the appliance must meet the requirements   adherence to good manufacturing
                                                                      of this listing 5 in place of the          practices as per 29 CFR 1910.106. If
                                                                      requirements in UL 61010-2-011.            refrigerant levels in the air
                                                                     Requirements of note include:............   surrounding the equipment rise above
                                                                     (a) Warning labels--The following           one-fourth of the lower flammability
                                                                      markings, or the equivalent, must be       limit, the space should be evacuated,
                                                                      provided in letters no less than 6.4 mm    and reentry should occur only after the
                                                                      (\1/4\ inch) high and must be permanent:.  space has been properly ventilated.
                                                                     (b) Attach near the machine compartment:   Technicians and equipment manufacturers
                                                                      ``DANGER--Risk of Fire or Explosion.       should wear appropriate personal
                                                                      Flammable Refrigerant Used. To Be          protective equipment, including
                                                                      Repaired Only By Trained Service           chemical goggles and protective gloves,
                                                                      Personnel. Do Not Puncture Refrigerant     when handling flammable refrigerants.
                                                                      Tubing''.                                  Special care should be taken to avoid
                                                                     (c) Attach near the machine compartment:    contact with the skin which, like many
                                                                      ``CAUTION--Risk of Fire or Explosion.      refrigerants, can cause freeze burns on
                                                                      Flammable Refrigerant Used. Consult        the skin.
                                                                      Repair Manual/Owner's Guide Before        A class B dry powder type fire
                                                                      Attempting To Service This Product. All    extinguisher should be kept nearby.
                                                                      Safety Precautions Must be Followed.''.   Technicians should only use spark-proof
                                                                     (d) Attach on the exterior of the           tools when working on air conditioning
                                                                      refrigeration equipment: ``CAUTION--Risk   equipment with flammable refrigerants.
                                                                      of Fire or Explosion. Dispose of          Any recovery equipment used should be
                                                                      Properly In Accordance With Federal Or     designed for flammable refrigerants.
                                                                      Local Regulations. Flammable Refrigerant   Only technicians specifically trained
                                                                      Used.''.                                   in handling flammable refrigerants
                                                                     (e) Attach near all exposed refrigerant     should service refrigeration equipment
                                                                      tubing: ``CAUTION--Risk of Fire or         containing this refrigerant.
                                                                      Explosion Due To Puncture Of Refrigerant   Technicians should gain an
                                                                      Tubing; Follow Handling Instructions       understanding of minimizing the risk of