A heat exchanger containing two diagonal coils that are connected together in a manner that resembles the letter “A”.

Abbreviation for alternating current, an electric current that reverses its direction many times a second.

Abbreviation for equipment capable of operating on alternating or direct current.

Air Conditioning Contractors of America.

Of or pertaining to sound.

Annual Fuel Utilization Efficiency. A measure of a gas furnace’s efficiency in converting fuel to energy. The higher the rating, the more efficient the unit. The unit is more efficient when the rating [..]

Abbreviation for American Gas Association, Inc.

A piece of machinery that removes unwanted particles from moving air.

A system for controlling the humidity, ventilation, and temperature in a building or vehicle.