We paid as much as the cost of a new car, and within the first year, the TXV (Thermostatic Expansion Valve) had to be replaced, not once, not twice, but three times. Each time, with the system down for days. Also within the first year, the compressor broke – completely stopped functioning. After it was replaced the system has never cooled as effectively as it did with the original. We have had a horrible ordeal with our HVAC replacement. The salesperson lied about the age of our ducts, he claimed they were 4 or 5 years old, when upon closer inspection they had 1998 stickers on them. (16 years old, the originals, and had to be replaced after the new HVAC had already been sold to us and installed). The company that sold us our unit tried very hard to make things work well, but it just isn't a good unit. They came out so many times, changed things so many times. After a year we just gave up and left it as it is. 2 last complaints: 1) Because the AC became so ineffective, the company changed our fan settings to always be on the high speed – so there's no energy savings from low to high speed fan. 2) Any claims that it is as quiet as a refrigerator are outright bogus. It is just as loud as a low cost AC unit. The outside unit sits on a flimsy piece of fiberglass that looks like a fake piece of concrete, and its fan seems very poorly balanced. I will never buy a Lennox product again. I've heard good things about Carrier and what I saw on a Home Depot model unit was metal fans, metal housings, not this plastic [email protected]$% like on my Lennox unit.