1 hour
The recovery time is the time the water heater takes to reheat its entire supply of water, and depends on whether the heater is a gas or electric model. A gas water heater will recover in half the time of an electric unit. A 40-gallon gas water heater can recover in about an hour. Recovery for a 40-gallon electric water heater takes about two hours. Gas Hot Water Heater Recovery. Take the electric hot-water heater recovery times and divide them in half to get the recovery time for a gas unit. Water coming into a 50-gallon tank at 40 degrees takes just 53 1/2 minutes to reach 120 degrees. A 50-gallon hot water heater with 5,500-watt elements set to 120 degrees takes about 1 hour and 20 minutes to heat water coming in to the unit at 60 degrees. Conversely, when the water entering this same tank is 40 degrees, it takes 1 hours, 47 minutes to heat it up. A 40-gallon gas water heater typically recovers in an hour. One day you may step in the shower, turn on your hot tap and have only cold water come out. This chilly inconvenience may be the result of your water heater’s recovery time. Gas hot water heaters are more efficient than electric ones; they heat up in about half the time. The temperature of the water coming into the unit and the temperature setting to heat the water in conjunction with the power supply determine how long it takes for a 50-gallon hot water heater to heat up. Speed of Recovery. The recovery time is the time the water heater takes to reheat its entire supply of water, and depends on whether the heater is a gas or electric model. A gas water heater will recover in half the time of an electric unit. A 40-gallon gas water heater can recover in about an hour. Recovery for a 40-gallon electric water heater takes about two hours.
http://homeguides.sfgate.com/long-40gal-water-heater-recover-87960.html http://www.ehow.com/decision_6896036_long-water-heater-heat-up_.html http://www.ehow.com/decision_6896036_long-water-heater-heat-up_.html http://homeguides.sfgate.com/long-40gal-water-heater-recover-87960.html http://www.ehow.com/decision_6896036_long-water-heater-heat-up_.html http://homeguides.sfgate.com/long-40gal-water-heater-recover-87960.html
how long does a gas water heater take to heat up