I see that Rheem has a new RGRM series 95% Gas Furnace line. Yet the 45 thru 105K units do NOT qualify for the Federal Tax Credit for having an Advanced Main Air Circulating Fan, while the 120K models does, but is ONLY 93% AFUE. So it doesn't qualify for the bigger $$$ Tax Credit. Does anyone know why this would be?
Are the motors on the RGRM 45-105 actually variable speed? Or are they some variation of an X-13 motor?