I have used Larson Air - Air Conditioning and Heating Service for several years, and frankly, I would not use anyone but them. They do excellent work, and they are very polite people. It is one thing to say that about the routine sort of work like the spring and autumn checkups, but I have also had them do some major work for me. My old air conditioner went out, and they recently installed one of those units that goes on the top of your roof. I loved they way they explained every step of the process to me. For example, the crane will come today and do whatever, and then we lift the unit up, and so forth and so on. You could not ask for a better company. They went above and beyond throughout the entire process. To make it even better, my unit is different from every other unit in the neighborhood. They put down a solid base, rather than the usual base with metal legs, to keep the pigeons out. I was so totally impressed with Larson Air - Air Conditioning and Heating Service that I asked for some of their business cards to pass out to my friends! I can not say enough good things about them!