20x12 NEW RECTANGULAR DUCTWORK EXISTING TO REMAIN RECTANGULAR DUCTWORK EXISTING TO BE REMOVED RECTANGULAR DUCTWORK 20x12 20x12 NEW INSULATED RECTANGULAR DUCTWORK (SIZE SHOWN IS INSIDE CLEAR) 20x12 20x12 NEW LINED RECTANGULAR DUCTWORK (SIZE SHOWN IS INSIDE CLEAR) 20x12 CONNECT NEW TO EXISTING 20x12 REMOVE FROM EXISTING NEW SUPPLY DIFFUSER/GRILLE NEW RETURN DIFFUSER/GRILLE NEW EXHAUST DIFFUSER/GRILLE 20x12 RECTANGULAR SUPPLY DOWN 20x12 RECTANGULAR SUPPLY UP 20x12 RECTANGULAR RETURN DOWN 20x12 RECTANGULAR RETURN UP 20x12 RECTANGULAR EXHAUST DOWN 20x12 RECTANGULAR EXHAUST UP 20x12 MANUAL VOLUME DAMPER REQUIRED AT ALL BRANCH TAKE-OFFS (RECTANGULAR AND ROUND DUCTWORK) S-1 12x12 525 CFM DIFFUSER/GRILLE CFM DIFFUSER/GRILLE NECK SIZE DIFFUSER/GRILLE SCHEDULE MARK 20Ø NEW ROUND DUCTWORK EXISTING TO REMAIN ROUND DUCTWORK EXISTING TO BE REMOVED ROUND DUCTWORK NEW INSULATED ROUND DUCTWORK (SIZE SHOWN IS INSIDE CLEAR) ROUND SUPPLY DOWN ROUND SUPPLY UP ROUND RETURN DOWN ROUND RETURN UP ROUND EXHAUST DOWN ROUND EXHAUST UP 20Ø 20Ø 20Ø 20Ø 20Ø 20Ø 20Ø 20Ø 20Ø ROUND FLEX DUCT 20Ø DIFFUSER/GRILLE TAG 20/12 NEW FLAT OVAL DUCTWORK EXISTING TO REMAIN FLAT OVAL DUCTWORK 20/12 EXISTING TO BE REMOVED FLAT OVAL DUCTWORK 20/12 NEW INSULATED FLAT OVAL DUCTWORK (SIZE SHOWN IS INSIDE CLEAR) 20/12 20/12 FLAT OVAL SUPPLY UP 20/12 FLAT OVAL SUPPLY DOWN 20/12 FLAT OVAL RETURN UP 20/12 FLAT OVAL RETURN DOWN
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