GE PNM1871SMSS Installation Instructions - Page 4

Installation Instructions HOOD EXHAUST NOTE: Read these next two pages only if you plan to vent your exhaust to the outside. If you plan to recirculate the air back into the room, proceed to page 6. OUTSIDE TOP EXHAUST (EXAMPLE ONLY) The following chart describes an example of one possible ductwork installation. DUCT PIECES EQUIVALENT NUMBER EQUIVALENT LENGTH x USED = LENGTH Roof Cap 24 Ft. x (1) = 24 Ft. 12 Ft. Straight Duct (6″ Round) 12 Ft. x (1) = 12 Ft. Rectangular-to-Round 5 Ft. Transition Adaptor* x (1) = 5 Ft. Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood. Total Length = 41 Ft. * IMPORTANT: If a rectangular-to-round transition adaptor is used, the bottom corners of the damper will have to be cut to fit, using the tin snips, in order to allow free movement of the damper. OUTSIDE BACK EXHAUST (EXAMPLE ONLY) The following chart describes an example of one possible ductwork installation. EQUIVALENT NUMBER EQUIVALENT DUCT PIECES LENGTH* x USED = LENGTH Wall Cap 40 Ft. x (1) = 40 Ft. 3 Ft. Straight Duct 3 Ft. (31⁄4″ x 10″ Rectangular) x (1) = 3 Ft. 90° Elbow 10 Ft. x (2) = 20 Ft. Equivalent lengths of duct pieces are based on actual tests and reflect requirements for good venting performance with any vent hood. Total Length = 63 Ft. NOTE: For back exhaust, care should be taken to align exhaust with space between studs, or wall should be prepared at the time it is constructed by leaving enough space between the wall studs to accommodate exhaust. 4