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DD Series
Rectangular Pressure Relief Dampers
Available Size: 20x10
DuroZone Pressure Relief Dampers are used to relieve excess air pressure created when less than all the zones of a duct system are calling. They do this in a simple and reliable fashion based on barometric/static pressure in the duct system. When pressure builds up in the duct system due to satisfied zones, the pressure opens the damper blade and “bypasses” to an unconditioned area or back to the return air duct. The pressure relief damper closes when the system is off or when all the zones are calling.
Rectangular barometric relief dampers have a single blade design with an adjustable weighed arm to regulate static pressure. Like a motorized rectangular damper, these barometric dampers are of open frame design and are made to install inside a section of rectangular duct. Vertical mounting is suggested.
Application: Residential and light commercial low pressure duct systems.
