-Very reliable I have used this company since they started they have always been responsive. -FURNACE REPAIR They were very knowledgeable of the Armstrong Heat/air unit I have. They found the problem quickly and installed a gas valve to repair the unit. This was the case even though the old gas valve was giving wrong error codes about the malfunction since it was a bad unit. Nice job and a good price. -I used Horizon Mechanical for the very first time. I could not be any more pleased with the service they performed. I have been in the Construction business for about 38 years. Outstanding job guys. I will be calling on Horizon again for my HVAC work. -This company has a whole new heart. The people with which I spoke helped me where other companies could not. After speaking with them, the tech that was dispatched to my property was very nice and efficient with his work. He answered any and all additional questions that I had and was very polite upon leaving. This is a company I highly recommend if you are in need of anything HVAC.