Components which are inserted into the air distribution system and designed to reduce airborne noise which is propagated along the ducts.

The total of the indicated gage pressure plus the atmospheric pressure. Abbreviated "psia" for pounds per square inch absolute.

The number of times that air in a building is completely replaced with outdoor air in one hour.

Act of combining substance with air.

The part of the A/C system that contains the blower, cooling (evaporator) coil, and heater.

The amount of air required to completely replace the air in a room or building; not to be confused with recirculated air

Equipment that conditions air by cleaning, cooling, heating, humidifying, or dehumidifying it. A term often applied to comfort cooling equipment.

A process that maintains comfort conditions in a defined area.

Mechanism designed to lower temperature of air passing through it.

Air distribution outlet or grille designed to direct airflow into desired patterns.