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20" x 8" Comfort SystemT "BH" Series Rectangular Barometric Bypass Damper
"BH" series barometric bypass dampers are used to automatically bypass excess air when increases in duct static pressure occur due to closing of zone dampers. Various relief air control settings are accomplished by simple adjustment of the weight on the arm. Barometric relief dampers are recommended for systems up to 0.75" W.C. of static pressure (for higher pressure systems use motorized bypass dampers).
"BH" series dampers operate automatically to relieve excess air in duct systems through the use of a counter-balanced weighted control arm. The weight can be moved either direction along the entire length of the arm to allow the damper to open only when necessary.
-Fast, simple installation
-Heavy gauge shell is fabricated from galvanized steel, with one straight and one crimped end, along with rolled- in stiffening beads for superior rigidity
-Smooth and quiet operation
-Heavy-duty blade gasket
Construction: 22 Ga. Galvanized Steel
Temperature Rating: 0 F to 180 F Operating
Humidity: 5% to 95% Non-Condensing
Static Pressure: Maximum 0.75" W.C.