Providing Residential & Light Commercial Comfort Solutions for Southern California. AJ Heating and Air Conditioning operates out of Southern California and has been in business over 12 years. We specialize in air conditioning, heating and indoor air quality. We provide the best comfort solutions for both residential and light commercial customers in the entire Orange County area and Inland Empire area. Our technicians are equipped to tackle anything from routine maintenance to turnkey installations. We take pride in providing our customers with the best solutions for their specific needs, and our extensive HVAC experience guarantees our recommendations will be the best. Take a look at our products and services, and let us know how we might enhance your comfort control!