I’ve used Tech Air for about 10 years. At my old place of business, my new place of business, at my home, at my parents home, at my brothers home, at 2 rental units I manage. I’ve used them for new unit installs and old unit repairs. They are on time and reliable. I don’t believe they are the cheapest or most expensive. However, all the problems they have fixed for me have stayed fixed all the new units they installed were installed right the first time. I would recommend them.