Air Control Products: HHE/PRD
AirVent family →Pressurized zones need a relief path that acts by itself. A PRD's weight-balanced blades open at the set pressure threshold and reseat when it falls, holding room differentials without controls or power: the quiet regulator behind cleanroom and stairwell pressurization.
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Weight-balanced blades open at the set pressure threshold and reseat when pressure falls, holding room differentials without controls or power: the quiet regulator behind cleanroom and stairwell pressurization.
More from Dampers
Manual or motorized multi-blade dampers for balancing air volume across supply and return mains: the tap of the duct system.
Aerofoil-blade VCDs: shaped blades that throttle high-airflow mains with less noise and turbulence than flat blades.
Round VCDs: single-blade volume control for round ducts, spigots and branch take-offs.
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