C. D. Shanahan's Heating and Cooling, LLC, is a family-owned and family-operated business serving homeowners and businesses throughout Northern Virginia, including Falls Church. It provides HVAC and furnace services, including vent installation, ductless mini-split maintenance, and heating unit replacement. Its technicians perform annual system maintenance services, including air filter inspection, gas leak testing, and safety control check. The service provider is an authorized HVAC equipment supplier. Owner Connor Shanahan has been handling HVAC systems since he was 14.