Copperline LLC Heating and Air Conditioning was founded in 2010 in Avon Lake, Ohio. Since that time, Copperline has been providing exceptional residential and light commercial HVAC services in Avon Lake and surrounding cities.We are a Trane dealer and specialize in installation, service and maintenance of Trane equipment as well as most other major manufacturer’s equipment. We have a full service sheet metal shop and warehouse that enables us to fabricate sheet metal and ductwork for our jobs.