GE JV248PSS Use and Care Manual - Page 7

Installation Instructions WORKSHEET-CALCULATE TOTAL EQUIVALENT DUCTWORK LENGTH DUCT PIECES 31⁄4″ x 10″ Rect., straight 7″ Round, straight 6″ Round, straight 31⁄4″ x 10″ Rect. 90° elbow EQUIVALENT NUMBER LENGTH x USED 1 Ft. x( ) 1 Ft. 1 Ft. 14 Ft. x( ) x( ) x( ) 31⁄4″ x 10″ Rect. 45° elbow 31⁄4″ x 10″ Rect. 90° flat elbow 31⁄4″ x 10″ Rect. wall cap with damper 31⁄4″ x 10″ Rect. to 6″ round transition 31⁄4″ x 10″ Rect. to 6″ round transition 90° elbow 6″ Round, 90° elbow 8 Ft. 33 Ft. 24 Ft. (18 ft. w/o damper) 2 Ft. 4 Ft. 25 Ft. x( ) x( ) x( ) x( ) x( ) x( ) x( ) = TOTAL = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. = Ft. 6″ Round, 16 Ft. x( ) = Ft. 45° elbow Subtotal column 1 = Ft. MAXIMUM DUCT LENGTH: For satisfactory air movement, the total duct length of a 31⁄4″ x 10″ rectangular, 7″ diameter round duct should not exceed 65 equivalent feet. DUCT PIECES EQUIVALENT NUMBER LENGTH x USED = TOTAL 6″ Round 53 Ft. x( ) = Ft. wall cap (39 ft. w/o with damper) x( ) = Ft. damper 6″ Round 72 Ft. roof cap x( ) = Ft. 6″ Round 3 Ft. to 31⁄4″ x 10″ rect. transition x( ) = Ft. 6″ Round 9 Ft. to 31⁄4″ x 10″ rect. transition 90° elbow x( ) = Ft. 7″ Round, 14 Ft. 90° elbow x( ) = Ft. 7″ Round, 9 Ft. 45° elbow x( ) = Ft. 7″ Round 28 Ft. x( ) = Ft. wall cap (21 ft. w/o with damper) x( ) = Ft. damper 7″ Round 39 Ft. roof cap x( ) = Ft. 7″ Round 1 Ft. to 31⁄4″ x 10″ rect. transition 7″ Round 5 Ft. to 31⁄4″ x 10″ rect. transition, 90° elbow x( ) = Ft. x( ) = Ft. Subtotal column 2 = Ft. Subtotal column 1 = Ft. Total ductwork = Ft. 7