I live in Georgia. I purchased a 45,000 BTU furnace with a 3 ton coil and 2 ton blower, which is okay to be paired up this way. It is an Amana/Goodman unit, 90% efficiency, 2 stage complete HVAC system. My problem is that I purchased this off Craigs list, was assured still under warranty, but isn't. And I have found out that the unit is too large for my studio basement apt. of about 600 sq feet or so. It was a really good deal, but not if can't use. My main furnace for the house is a 1968 Coleman with cast iron heat exchanger, 115 BTU, works well but not efficient. The furnace does buzz a good while before kicking on, so needs a new igniter. What is best to do, resell the craigslist furnace and purchase a new Haier 90,000 BTU and zone the basement to the main furnace? or keep the Craigs list furnace system and install, and maybe later install a smaller system for the main floor of my home? My home is the typical 3 bedroom, 2 bath on the main on a (half) partial walkout basement. I do have a large family room that is a bit atypical. But not more than about 2200 sq feet; maybe slightly less. Does anyone have any experience with the Haier furnaces and AC units? I know their appliances do not rate very well, but not sure about the HVAC systems. Also the product I'm looking at is an R22, and so costs much less, but the installer says that it is warranted; and that in the event it fails the compressor can be converted to 410A since the motor, compressor and etc are all pretty much made my the same manufacturers; and the refrigerants can be used in either type of system. Thoughts, comments, recommendations??? Thanks for any helpful comments.