Recent content by santa99

Sorry, a little more info - exisiting house (and furnace) is only 5 years old. Good furnace, Carrier 58 STA/STX. The other driver here is that i have AC on present furnace and dont want to have to add another AC unit on 2nd furnace (for cost reasons). I will likely just have additional small...

I presently have a 81% mid efficient furnace (132k btu/hr input) & a 42k btu/hr draft hood hot water tank common vented up a common 5" B-Vent (approx 30' total length). It is a code installation where i live. I am hoping to soon start a ~500 ft2 renovation / addition which may require upsizing...