What 20" furnace with vs blower available with tax credit?
I was told the x13 but this is not variable speed.
There are quite a few. Look for 'C' sized furnaces for 20'. A qualified 95 AFUE furnace will get you a 30% tax credit. A qualified 80 AFUE furnace with an ECM motor will get you about 8% to 9% depending on the model.