Unlike re-circulated air, this is the total air required to completely replace the air in a room or building.
A rating that measures the amount of heat your equipment delivers for every dollar spent on fuel. A higher rating indicates more efficient equipment.
Equipment that simultaneously controls air temperature, relative humidity, purity and motion.
An air distribution outlet or grille that directs airflow into desired patterns.
The part of the central air conditioning or heat pump system that circulates heated or cooled air throughout ductwork. Some furnaces perform this function.