Over the last many, many years that I have dealt with subcontractors in San Diego, I can honestly say that I was the most impressed with THA Heating and Air. I contacted 5 subs to give me estimates to replace my old and very tired furnace and air conditioner. The most professional and cost effective proposal was from THA. And...it just started there. The quality of the work that they do, the promptness, the attention to detail and the knowledge of the staff far exceeded my expectations and I am a bit... well maybe more than a bit... of a perfectionist. You will not be disappointed with choosing this high quality company.