Can I use a Filtrete (TM) Thermostat from 3M with my system?
Yes, in most case it can. The Filtrete (TM) Thermostat from 3Ms are compatible with low voltage (mili-volt to 24 volt) whole house residential systems. The current wiring on your existing thermostat will be used with the new thermostat. We also make units that are compatible with high voltage systems 120 to 240 volts. See compatibility matrix for details.