Take the tour ×  I would like to have two thermostats
controlling a single furnace. However I'm not 100% sure how I
would need to wire everything to achieve the correct effect.
Assuming a thermostat simply acts like an on/off switch, I think
that I could run another set of wires in parallel to the
existing ones. I believe the current thermostat simply uses two
wires. Would this work? Are there considerations as to the type
of furnace or thermostat?  I'd add the second thermostat in the
basement and normally keep it at a low temperature unless I'm in
the room. As it is now with the thermostat upstairs, it's very
difficult to keep a consistent temperature below.  I don't want
to move the upstairs thermostat because if I'm not in the
basement I don't care how cold it gets and the upstairs would
become inconsistent.  share|improve this question You won't be
able to heat your basement and upstairs separately simply by
adding a thermostat. If the basement thermostat calls for heat,
the heat will be delivered to th