Air that is designed to replace air from the exhaust of an appliance or fireplace.
Unfiltered air introduced to a re-circulated air system
Air that is supplied to a building to replace the air that has been removed by an exaust system.
a major contributor to indoor air humidity control problems
Air brought into a building from outdoors through the ventilation system and that has not been previously circulated through the system.
free or available air needed to permit fume hood to develop face velocity.
Unfiltered air that is introduced into a re-circulated air system.
See " Outdoor Air Supply."
See HEATER, MAKE-UP AIR.
Air brought into a building from outside to replace exhaust air.
See Replacement Air.
Air that is added to a room from which air is being removed, such as by an exhaust fan where the intake of fresh air would be make-up air.