I have had maintenance agreements with another heating company for years. The office administrator was not the least bit consumer friendly, but the technicians were nice and seemed to be doing a good job. I had questioned a few things in the past, but was always told everything was fine. They were in and out of my house that has 3 thermostats and 2 heat pumps in 30 - 40 minutes each inspection. After experiencing dissatisfaction with my current company, I decided to change, and found Tristate’s ad in Frederick Magazine. Now that I have had a thorough inspection, from Tristate, I realize the previous company were just reading some gauges, and doing a surface visual check. Dan from Tristate was so friendly, knowledgeable and professional. He provided the service that I should have been getting for years! Thank you Tristate!