I've Heard of Trane, Carrier, Heilbut wich is best or does it really matter with the brand on a furnace and a/c unitI'm getting a lot of quotes that range from $5500 up to $18,000 for a 3 1/2 ton a/c 100,000 btu gas furnace My home is right at 2,000 sqftand has 14 vents of wich 3 are ran in the attic b/c that part of the house is a additionOne guy wants to tear out all the attic vents and put in new ones and double them from 3 to 6 Some are Hybrid heat pump and they are more expensive but not by more than $800 over the standard but I havn't had to shop for this type of item before and I don't know much about it and of course every sales guy that comes out with a different brand claims their's is the best.
