A 60x60 return air opening sits atop the duct, protected by a mesh cap. The supply system utilizes 16-inch diameter ducts installed at a 45-degree angle, each fitted with a mesh cap and a manual volume damper. The system capacity is 1250 cubic feet per minute per unit, with eight units typical for this configuration.
Text on the drawing
SD 60x60 RETURN AIR OPENING ON TOP OF DUCT W/ MESH CAP. WHP 4 16" DIA. SUPPLY DUCT AT 45 DEG. ANGLE. W/ MESH CAP AND MANUAL VOL. DAMPER. 1250 CFM EACH. TYP. OF 8. T
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