The Qualifications to Give You Peace of Mind At Bob Brown Service Experts Heating & Air in Phoenix, we’ve been serving the community since 1973 and all of our experts and equipment installers are licensed, highly qualified and NATE-certified. We encourage you to learn about NATE certification and all it requires. It’s a notable credential that our service folks have earned through learning, know-how, 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 623-243-4517 for Bob Brown Service Experts Heating & Air in Phoenix. We have all of the best qualifications to provide expert furnace and AC repair and service. And all of our work is 100% guaranteed for a full year!