See above on models #'s for air handler / stat: will include below: What size zone in living area? Guessing 1500 in the area this one zone will cover. All companies were in agreement with a 2 ton system. For a 2 ton, that is some very frisky pricing.: These quotes were almost $1100 below another HVAC company. Do you think this is high? Can you give the model number of the air handler quoted? Trane 7 series (TAM7AOA24H21SB) What does the quote include and complete scope of work involved? New ductwork? Air filter cabinet? What Mdl thermostat quoted? All work included, Trane 802 stat quoted. Will look into american standard. But just quotes from two companies on trane products so far. Thanks

village I took a look at the CEE HVAC directory today for matching AC systems for the 3.5 ton XL15i vs the 4 ton 2 stg XL16i. There was less than 1 SEER difference between these two models-15.75 vs 16.25. I would not want to be undersized though for Florida. If you are certain of your sizing, then I would go for for the XL15i. Don't use Trane stat. Insist upon the Honeywell Vision Pro IAQ which handles humidity control better than anything Trane offers. You may save a few dollars looking at the comparable Am Std Allegiance systems. IMO Here is a link that might be useful: CEE HVAC Directory

I have revisited this posting several times because I have been going back and forth trying to determine the pros and cons of a 15 versus 16 seer American Standard heat pump. We moved to Greenville, SC about two years ago knowing that we would be replacing our hvac system and duct work within a few years. We have a gas furnace and outdoor a/c that is about 22 years old. We have a reputable contractor and we have had the appropriate load calculation done. This thread has me stumped on which direction to go. We have a ranch style 2600 square foot home and we have no complaints about our humidity control in our home. With the current AS rebates the 16 seer 4-ton heat pump will be about the same cost as the 15 but I wondering if we want it. People prefer the latent humidity control of the 15 but why and what does that mean? I understand that the efficiency difference between the two is small. My main concern is the humidity control between the two systems. What is the difference between on demand humidity control on the thermostat versus the humidity control on the 16 seer AS model? Would having the first stage setting running more often than a 15 create more condensation on the coil and make us more susceptible to moisture/mold issues? If so, how do you know this? I spoke to someone today who had the 15 seer furnace and outdoor a/c and within two weeks asked for the contractor to upgrade them to the 16 seer because they said their home was too humid. He said he is in love with his system now. Can this experience be applied to the heatpumps? Thanks so much!!

Not an appropriate post...prices can vary from region to region along with competitive forces at work...plus the ease or difficulty of job and complete description of scope of work involved. And there is absolutely no reason to know or even care what the equipment and labor cost breakdown is. At the end of the day you are interested in the installed price. It does seem you have speced out the equipment you want. With the XL15i system, you get Trane's proprietary top and the extra 2 yrs on compressor warranty. You do want best matching TAM7 var speed air handler. For sake of comparison, I would also get a price on Trane's XR15 and 2 stage XR17 systems. And you might be interested that sister company AmStd has exact same as Trane's XR series heat pumps usually less expensive. I always suggest an inspection of ductwork system. Any hot or cold spots in home should be addressed. I am done here. IMO