I have been using One Hour Heating and Air Conditioning for years, and they're great. They're always pretty good when it comes to scheduling my appointments, and their techs are respectful, and show up on time. This most recent time, they did some maintenance on two of my geothermal units, along with working on a faulty water heater. They send out good people, who are top-notch, knowledgeable, and I never have to worry about them. I wouldn't hesitate to continue using this company.