AB Browns Heating, AC Duct Work AB Browns Heating, AC Duct Work is a Air Conditioning Repair Service in Washington, DC that has been doing business since 1989, specializing in HVAC Contractor, Heating, Air Conditioning Repair, Air Conditioning Service, Central Air Conditioning, Heating and Air Conditioning Repair, Spacepak, High Velocity Air Conditioning, Central Air, and Boiler Repair.