I have had HVAC work done before, on this house & and another house I had, by far this was the best experience I have had with HVAC work. All of the technicians knew their job and did excellent work. The owner of the company stopped by to check on the final work to make sure it was up to his quality standards. They came back after the cooling season was done to make sure the heat was working properly. Due to the way the water heater and furnace enter the chimney they came back again on a colder day to make sure there was no CO was back drafting into the house. They double checked the CO with two different detectors just to be sure everything was correct.