my new (last Oct.) Trane furnace is a "2 stage" furnace but it's running with my old thermostat. should I invest in a 2 stage thermostat or just leave it?
The technology works VERY well if you have PROPERLY sized ductwork. We have a new XC17 and XC 21 SEER series AC that can be hooked up to Lennox supplied solar panels (Sun Source energy system) that can power the condensor fan motor when it is sunny outside. The condensor fan motor is now a variable speed high efficient ECM motor. Waiting for the transfer panel and system and approval to sell the excess power back to the grid. Guess who is going to get to hookup and make that system work. Moi/Me.:yes:
We sold one to a rich lawyer who wanted nothin but the best for his daughters house. Fujitsu has VERY high tech and incredibly efficient 21 SEER minisplits with DC inverter ECM compressors. Great technology but only for the highly skilled techs.