The Qualifications to Give You Peace of Mind At Knochelmann Service Experts Heating & Air Conditioning in Cincinnati, we’ve been serving the community since 1927 and all of our experts and equipment installers are licensed, highly qualified and NATE-certified. We encourage you to read about NATE certification and all it requires. It’s a notable credential that our service folks have earned through study, 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 513-273-5771 for Knochelmann Service Experts Heating & Air Conditioning in Cincinnati. We have all of the top qualifications to provide expert furnace and AC repair and service. And all of our work is 100% guaranteed for a full year!