Definitions for "Fire damper"
Device installed in ductwork in which (he duct passes through fire separations to aid in preventing the spread of a fire.
A device which allows the passage of ventilation air in normal conditions through a duct, wall or partition; but, closes automatically to prevent the passage of fire in a fire condition for a stipulated time period.
is a closure that is installed in a duct, floor or wall and is normally open, but in the event of a fire closes automatically to maintain the integrity of the fire separation.