Used Hal Mechanical for 8 years. Had an annual service contract with them for most of that time. All I can say is they are terrific. Chad, the tech who most often came to our house, was great. The company is reliable, trustworthy, on time, a pleasure to work with, and charges a very fair price. When they recommended a repair or replacement of a part, I always felt it was fully justified, and to the benefit of our two HVAC systems. I can unqualifiedly recommend the company and particularly Chad to anyone.