Installation InstructionsHOOD EXHAUSTNOTE: Read these next two pages only if you plan to vent your exhaust to theoutside. If you plan to recirculate the air back into the room, proceed to page 6.OUTSIDETOP EXHAUST (EXAMPLE ONLY)The following chart describes an example of one possibleductwork installation.EQUIVALENT NUMBER EQUIVALENTDUCT PIECES LENGTH x USED = LENGTHRoofCap 24 Ft. x12 Ft.Straight Duct 12 Ft. x(6" Round)Rectangular-to-Round 5 Ft. xTransitionAdaptor*Equivalentlengthsof duct piecesare basedon actualtests andreflect requirementsfor goodventing performancewith anyvent hood.(1)(1)(1)Total Length =24 Ft.12 Ft.5 Ft.41 Ft.* IMPORTANT: If a rectangular-to-round transition adaptor is used, the bottom corners of the damperwill have to be cut to fit, using the tin snips, in order to allow free movement of the dampeLOUTSIDE BACK EXHAUST (EXAMPLE ONLY)The following chart describes an example of one possibleductwork installation.[DUCT PIECESWall CapEQUIVALENT NUMBERLENGTH* x USED40 Ft. x (1)3 Ft.Straight Duct3W'x 10" Rectangular)90° Elbow3 Ft. x (1)10 Ft. x (2)EQUIVALENTLENGTH40 Ft.3 Ft.20Ft.Equivalentlengthsof duct piecesare basedon actual tests andreflect requirementsfor goodventing performancewith anyvent hood.Total Length = 63 Ft.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.4