Alan is the BEST!!  My heater broke down last year and I had CPM Air come out to look at it and after a year of trying to get them to fix my heater which they quoted me at $650 to replace a part and to replace the thermostat that they replaced last year that doesn't even work, I finally decided to get someone else in after several futile attempts to get them to call me back.  I found out in the process of calling around that I have a very unique chiller system that is rarely used anymore and not too many companies will or are able to repair these units. I ran across Alan's Air on Yelp and he was the only company out of the 4 companies I called that would work on my type of system. He came out, took the piece off and took it home with him and repaired the unit, and came back the next day and installed it, instead of telling me to replace it like most companies seem to do these days and also gave me a new programmable thermostat saving me $400!! I am so glad I stumbled across Alan and I will never use anyone else!!