5Installation InstructionsHOOD EXHAUSTNOTE: Read these next two pages only if you plan to vent your exhaust to the outside. If you plan to recirculate the airback into the room, proceed to page 6. Below are examples of Outside Top Exhaust and Outside Back Exhaust duct systemlayouts. Note the position of the microwave oven relative to the duct system.OUTSIDE TOP EXHAUST (EXAMPLE ONLY)EQUIVALENT NUMBER EQUIVALENTDUCT PIECES LENGTH x USED = LENGTHRoof Cap 24 Ft. x (1) = 24 Ft.12 Ft. Straight Duct 12 Ft. x (1) = 12 Ft.(6″ Round)Rectangular-to-Round 5 Ft. x (1) = 5 Ft.Transition Adaptor*Equivalent lengths of duct pieces are based on actual tests andreflect 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 willhave to be cut to fit, using the tin snips, in order to allow free movement of the damper.The following chart describes an example of one possibleductwork installation.The following chart describes an example of one possibleductwork installation.NOTE: For back exhaust, care should be taken to align exhaust with space between studs, or wall should be preparedat the time it is constructed by leaving enough space between the wall studs to accommodate exhaust.OUTSIDE BACK EXHAUST (EXAMPLE ONLY)EQUIVALENT NUMBER EQUIVALENTDUCT PIECES LENGTH* x USED = LENGTHWall Cap 40 Ft. x (1) = 40 Ft.3 Ft. Straight Duct 3 Ft. x (1) = 3 Ft.(31⁄4″ x 10″ Rectangular)90° Elbow 10 Ft. x (2) = 20 Ft.Equivalent lengths of duct pieces are based on actual tests andreflect requirements for good venting performance with any vent hood.Total Length = 63 Ft.1” = 2.5 cm; 1’ = 0.3 m