Comfort installed my new heater/ac awhile back and are servicing it when it is the proper time. They always notify me, set up a time, and are here when they say they will. They take a lot of time checking everything, change the filter for me and by request, another lesson about the thermostat. I might add they are also very patient. I would hightly recommend this company. Their people are very nice, polite, very professional and eager to please.