In HVAC terminology, which option best defines supply air?

In HVAC terminology, which option best defines supply air?

• A. Air entering the air handler
• B. Air circulating within the building
• C. Air leaving the air handler
• D. Air at the outdoor unit

Answer: (C)

Supply air is the conditioned air delivered to the occupied spaces through the building’s ductwork. It comes from the air handler after the air has been heated or cooled and filtered, and then travels through the supply ducts to rooms and spaces. This is the air that actually enters the rooms to condition their temperature. This differs from air entering the air handler, which is the return air drawn from the spaces to be reconditioned; air circulating within the building refers to air that’s moving around inside the spaces or through the system but not yet delivered as conditioned supply; and air at the outdoor unit is the outside air that may be drawn in for ventilation or mixed with return air, not the air being supplied to the spaces.

Supply air is the conditioned air delivered to the occupied spaces through the building’s ductwork. It comes from the air handler after the air has been heated or cooled and filtered, and then travels through the supply ducts to rooms and spaces. This is the air that actually enters the rooms to condition their temperature.

This differs from air entering the air handler, which is the return air drawn from the spaces to be reconditioned; air circulating within the building refers to air that’s moving around inside the spaces or through the system but not yet delivered as conditioned supply; and air at the outdoor unit is the outside air that may be drawn in for ventilation or mixed with return air, not the air being supplied to the spaces.