Tri-County Climate Control did a really good job for us. We purchased a model home in 2015 and we recently had Tri-County come out to check the heat exchange. After the technician did the assessment he informed me that since this was a model home it appears that the builder did not hook up the thermostat and program it so that it would function properly for us. The past few winters the heat exchange felt as if it was blowing cold air like we had the air conditioner running instead of heat. The technician was very cordial and explained how the heat exchange works. He explained that the thermostat, when programmed properly, has three strips to run over for proper heating. He spent about two hours fixing the problem and talking everything over with me and explaining the thermostat. I want people to know they can absolutely trust Tri-County Climate Control and should give them a call!