Cox's Old Colony Heating, Air Conditioning & Plumbing has served homeowners and businesses in Hanover, MA, and the surrounding South Shore area for over 75 years. We specialize in residential and commercial HVAC service, offering repair, installation, maintenance, and indoor air quality solutions. Our team is experienced in sheet metal fabrication and air duct cleaning services. We're committed to your comfort, and our technicians are licensed, insured, and background-checked for your peace of mind.