An opposed blade damper connects to a supply air duct sized per plan, maintaining a 45-degree angle orientation with a 6-inch minimum clearance. A continuous seal is applied around the perimeter of the frame to prevent air leakage. Angular dimensions of 30 degrees govern the damper geometry.
OPPOSED BLADE DAMPER SUPPLY AIR DUCT SEE PLAN FOR SIZE 30 30 6" MIN. SEAL AROUND PERIMETER OF FRAME 45°
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