I was like others very pleased with the installation, but that's it. On January 3, 2014 called them in the morning for my furnace.The furnace is under warranty with "United energy" During the previous night the furnace stop working. After a few calls I managed to speak with a person. I explained and he told me that a technician will come afternoon. OK.
Nobody comes, I tried calling them again: "This is doctor comfort, United Energy, .bla, bla.......leave a message , will call you as soon as we can". I left them 10 messages , I sent them email with my detail info and contact. In home temperature is 10 deg. It's 5 January, the furnace doesn't work, they never came, they never called. I had to contact another company.
Going over their reviews at homestars.com, I noticed so many happy with the installation, like me, but checking their bad reviews I noticed those complains are like mine: they are not coming after installation, they never return calls, they are blaming the previous management - I have to say here that a few years ago I had a warranty call for the same furnace, and the previous management sent a technician in the same day.
I'm sure that next time I'm not going to chose a furnace by Carrier for example, just because it's served by company like: "United Energy Heating and Air Conditioning Inc"