I live in MD and have a 30+ year old gas furnace that soon needs replacement. BGE is the local company and their man recommended a two-stage Carrier unit exactly matching my old one's BTU rating. In the last 2 years we have added insulation, replaced all doors, (particularly a sliding door that might as well have well been a hole in the wall!), and put in really great windows. With these upgrades, do we have to match BTU for BTU with the old and new units? From some other posts here, I wonder if it's necessary. Also, can anyone give me some feedback on BGEs estimates and savings with upgrades? Gerry
- posted
18 years ago