Air Control Products: HHE/OBD
AirVent family →The collar damper puts balancing where the branch begins: opposed blades inside the connecting collar, set through the face with a screwdriver, throttling each take-off without a separate damper in the duct. Opposed blades modulate linearly, so small adjustments mean small flow changes.
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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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