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 th [..]

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.

The amount of air the system circulates through your home, indicated in cubic feet per minute (cfm). Correct airflow depends on the indoor unit, the ductwork, the outdoor unit, and even whether the fi [..]