R&D Heating, Cooling & Electric is a good company. We had a couple of issues this summer with the air conditioning freezing up. R&D was able to resolve the problem. Also, over the winter we had some issues with temperature control. R&D was able to resolve that problem also. Every time we call, they send someone out quickly and the technician is able to solve the problem quickly. Only one time did we need a second visit for the same problem. But that was it. I'd definitely recommend them. They are polite, and very nice people. We'll continue using R&D Heating, Cooling & Electric.