Buyer beware! I rated them one star, because I couldn’t rate them any lower. I found out about Comfort Zone Heating and Air Conditioning through my Home Warranty Provider. Comfort Zone came to my house and assessed my HVAC. $3000 dollars later (replacement of blower and compressor) my unit has gone out twice in the past 10 days. Comfort zone came to my house today and acknowledged that they now think that I have leak and that the filters on the blower need to be changed. One would think that when you pay $3,000 that routine maintenance would have been done as a part of the initial diagnostic. Not with Comfort Zone! Then the owner (Sean) states because my home is in a very nice DC neighborhood, I should be okay with paying $3,000. Please think twice about using this company for your HVAC needs.