The Qualifications to Give You Peace of Mind At Freschi Service Experts in Concord, we’ve been assisting the community since 1980 and all of our professionals and equipment installers are licensed, highly qualified and NATE-certified. We encourage you to learn about NATE certification and all it entails. It’s a highly-touted credential that our service folks have earned through education, expertise, extensive training and testing. So if you should need HVAC service or repair, don’t just call some guy with a few wrenches and a truck. Call 925-384-1303 for Freschi Service Experts in Concord. We have all of the finest qualifications to provide expert furnace and AC repair and service. And all of our work is 100% guaranteed for a full year!