Air Conditioning & Heating Contractors Collin County / Plano, Texas Our mission at Enertia HVAC/R to make your home or business more comfortable and energy-efficient year-round. As a full-service HVAC/R contractor with 20+ years experience, we are able to offer you a wide array of services including air conditioning, heating, refrigeration, commercial hvac and home energy performance. BBB HVAC Contractors in Collin County Plano Texas.Whether you’re a homeowner in need of new AC installation or AC repairs, or a commercial business looking for HVAC maintenance, we are your go-to air conditioning and heating company in Collin County, Texas.