An outdoor supply air grill connects to a duct sleeve passing through a wall with a maximum grill depth of one and one-half inches and a two-and-one-half-inch setback. The inside of the duct is painted black by the HVAC contractor. Sample tubes and mounting bolts secure the internal components.
SADDLE ON ROUND DUCT ROUND BRANCH BALANCE DAMPER ROUND (OR RECT.) MAIN DUCT INSIDE OF DUCT TO BE PAINTED BLACK BY HVAC CONTRACTOR OSA GRILL 1-1/2" MAX. GRILL DEPTH OUTSIDE 2-1/2" SET BACK MOUNTING BOLT SAMPLE TUBES DUCT SLEEVES
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