I also posted this in pro residential forum
80% variable speed, modulating gas furnace
Is there such a thing out there. I know Carrier Infinity makes a three stage gas variable speed 80% furnace, but any mfr make a mod gas heat. I know why not go to 90+%. in this case not an option as furnace room in center of a finished basement and customer won't allow any wall demolitions and won't change out the water heater to power-vent (I also thought of that). Is Carrier/Bryant only ones with more than 2 stage gas, variable speed 80%?