The XC95m fully communicating modulating furnace modulates its heat output based on indoor conditions. As the difference between set and indoor temperatures increases, the furnace increases its heat ...

The Infinity™ IdealComfort™ System modulating gas furnace provides up to 3.5 times tighter temperature control than most standard furnaces, claims the company. This two-stage furnace maintains the ...

Q I made energy improvements to my house, but my 25-year-old gas furnace does not keep it as comfortable as before. Also, I think my gas bills should be lower? Which 2008 furnace models are most ...