Airsmiths Home Performance is a great company, they helped me out so much. I had them first come out to do a repair on my HVAC system where another company had really messed it up. They came out and fixed it and explained everything to me. When I decided to replace my current HVAC system, I only called Airsmiths Home Performance because they had impressed me so much with the repair they did. They responded quickly and got my new HVAC system in with no problems whatsoever. They also installed a Hybrid water heater for me that works great. They are a great group of guys and the owner responds himself when I call. If you go to www.smud.org, Sacramento county's website, you will see a short list of HVAC /electrical contractors who have all the necessary county certifications and Airsmiths Home Performance is on that list. I recommend them and Sacramento County does too. They are a very professional and qualified company. I wouldn't use anyone else. They will be doing the maintenance contract on my new HVAC system also.