Mark Groves owns and operates Gemini Services. About 5 years ago, our main level ac unit stopped working on a hot Saturday in July. We called around and no one close by would come that day or would charge an outrageous emergency service fee. Then we had the good fortune of finding Gemini Services — Mark arrived about an hour after we called and had the problem fixed within a half hour. He charged us his regular fee for only 1 hour(minimum) even though he had to travel over half an hour to get to our home. This week, the upper level heater had stopped working sometime in the morning. I called Mark and he arrived in the afternoon and carefully diagnosed the problem in the igniter. He cleaned the wires and repaired it in no time. Again, he only charged me for 1 hour. I should mention that his hourly rate is VERY reasonable. Sadly, Mark does not do installs, only repair services. I am so happy to have found an honest HVAC repair man.