Carbon Valley Heating & Air is great. They installed my furnace about seven years ago and have been taking care of maintenance and servicing for me. Most recently they came by to do the annual servicing. The technician who came out was professional and efficient. He did what he was supposed to and didn't leave a mess. He came in on time, took care of the job and was courteous throughout. Overall, I'd say it's been a good experience with this company.