Newbe to the forum 3rd post. Add-On Furnaces that connect to existing forced air ductwork. I'm in the market for an add-on furnace to replace my wood stove that is currently in my basement. Other then the Englander 28-3500, and the US Stove 1557M,,, What other makes and models are out there? House its going in is a 2 story colonial built in 1977, 2050 sq.ft. Any input is greatly appreciated.