I just got my second opinion for a replacement heat pump (live in N Florida) the first guy looked at all my duct work, the lines to the condensor unit and asked a lot of questions. He ended up recommneding a Carrier 4ton infinity series heat pump with Puron. He made a fairly detailed drawing of the ductwork including some changes that he felt were necessary above and beyond the adding of a cold air return from the master bedroom suite. He specifically noted that the duct work leading away form the uit looked undersized (the box is smaller than the existing air handler)
So today guy two comes out looks at things asks a few questions gets on the phone to his office and comes up with a price that is $4000 less for a Carrier unit. I know a no brainer, but all his estimate says is Carrier 14 seer. . . he says duct work but i don't see it. duh call his boss and get it in writing but how to know how far apart the bids are in reality