I'm looking for advice on which Carrier Infinity AC and furnace to get. I'm located in Maryland just outside of Washington DC, with central air conditioning and forced hot air system. We need to replace the AC unit which is no longer working. Our gas furnace, 80,000 BTUs at 60%, works fine but is 25 years old, so it seems it would be worthwhile to replace that as well.
A contractor recommended a 3 ton AC (24ANA136A31), and a 70,000 BTU 80% furnace (58CVA070-12). He said he could use the existing ducts but needs to run a leak test to see if he can use the refrigeration lines. He quoted a price of $ for the AC, $for the furnace, $ for a humidifier, and an additional $ if he needs to replace the refrigeration lines. With this package I'd get a $1,000 rebate from Carrier and a $1,500 tax credit. So the total cost would be $.
He recommended against the Infinity 96 or ICS furnace because it would be an additional $ in price, plus another $ in duct work would be required to get the tax credit. He said this would save me only about $150/year on the gas bill and would not be worth it.
Another option would be to get a heat pump instead of the AC and have a hybrid system. I'm not sure which model, he said something like Infinity 25HNA 17 SEER, and it would cost $ more. But, he said this would save me about $350/year on my gas bill and would be worth the additional cost. However, he said that this option requires that I get the 90,000 BTU furnace in order to qualify for the $1,500 tax credit. He said that he'd be willing to install the 70,000 BTU furnace which would match my house better, and fill out the paperwork so that I'd still qualify for the tax credit.
My first question is should I get the AC or the heat pump? My concern is whether the quality of the heat will feel as nice as the heat coming from a gas furnace. Are people generally satisfied with the Infinity heat pumps? (Also, does anyone know which heat pump model he's talking about?)
Second, if I get the heat pump, should I get the 70,000 or the 90,000 BTU furnace? He said it would be the same price for either one.
Third, are his quotes reasonable? If he installs the 70,000 BTU furnace with the heat pump, should there be an additional discount?
And fourth, should I even consider a geothermal heat pump?