I am a homeowner in Birmingham, AL needing to replace an old, 3 ton Goodman central air conditioning unit. I have a 10 year old, 2 stage Carrier gas furnace that was top of the line at the time, and by all accounts is still in good condition. We do not use central alot because we have lots of trees around the house giving shade--but there are days that we definitely need it.
We got estimate from an authorized Carrier dealer for 3 ton Carrier Comfort 13 SEER as well as a Performance 13 SEER, both with Puron. They include a cooling coil CNPHP4221ACA in their price for both units. In both cases, the estimate on these two units is the lowest I have received.
I got another estimate from a dealer for Amana and Comfortmaker 3 ton with R410A that was considerably more.
I got a third estimate from a authorized Lennox dealer (also selling Tranes) who took measurements one day and gave me the estimate the next. He gave me a quote for something that I really did not ask for, but may be a wise choice, all the same: the quote was for a Lennox XP13 heat pump (13 SEER) and a Trane TWR036 heat pump (14 SEER). He told me that it would be advantageous to go with the heat pump because it would provide heat when the temperature was 40 degrees or over outside, and do it more efficiently than the gas furnace. It is true that many of our fall, early winter and early spring nights would be 40+ degrees. Also, he included in the price a new "line set." He indicated that this was needed since we were going to another type of refrigerant. The Carrier quote does not include a new line set. The Lennox and Trane estimate was higher than both of the two previous estimates
Can anyone give suggestions on this? Do we need a new lineset? Is a heat pump really in order?