Damper
The 2018 International Residential Code (IRC), published by the International Code Council (ICC) defines a damper as: ‘A device that will restrict, retard or direct the flow of air in any duct, or the products of combustion of heat-producing equipment, vent connector, vent or chimney.’
Guide to Controls (BG 83/2023) written by John Marrow and published by BSRIA in June 2023, defines a damper as: ‘A device which regulates flow in an air distribution system, usually by means of moveable blades in the airstream.'
For example, see: Smoke damper and Fire damper.
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