10• Use a level to draw the cooktop centerline location.Draw the line to ceiling height.• Measure desired distance from the bottom of the hoodto the cooking surface, 30" min. to 36" max.Note: If you are installing the hood with duct covers, be sure to read“Using Duct Cover Accessories” page 7. Exact installation heightmay be determined by use of one or more duct covers.• Use a level to draw a straight horizontal pencil lineindicating the bottom of the hood.• From the line indicating the bottom of the hood,measure 15-3/8" up and draw another line for thelocation of the wood support. See illustration.FOR VERTICAL (Straight Up) DUCTING:• Use a level to draw a centerline from the bottom ofthe hood to ceiling or soffit.• If venting out the ceiling, extend the centerlineforward on the ceiling or soffit.• Locate the centerline of a 10-1/2" hole on the ceilingor soffit by measuring 6" from the wall.STEP 1 DETERMINE HOOD, DUCTWORK AND WIRING LOCATIONSFOR DUCTING THROUGH REAR WALL:• Measure 9-7/8" above the marked line for the top ofthe hood. At the centerline, mark location for a 10-1/2"diameter hole.House Wiring Location:• The junction box is fastened to the back of the hoodon the right side.Installation InstructionsAlternate Knockout LocationsIf the installation requires, the junction box can berelocated from the back to the top of the hood. Remove3 screws, align box to top knockout and secure withoriginal screws.• Remove junction box cover and knockout. Install strainrelief.18-13/16" for 48" Models12-13/16" for 36" Models9-13/16" for 30" ModelsElectricalArea8-3/8"6-1/2"18-1/16" for 48" Models12-1/16" for 36" Models9-1/16" for 30" Models*Depending onHood width andInstallation Height.Top of HoodBottom of Hood18"15-3/8"WoodSupport*House WiringLocation18"9-7/8"• The recessed back side of the hood provides a largearea for the house wiring to exit the wall and berouted to the rear knockout and junction box.• The location for the house wiring depends on theinstallation height of the hood and the width of thehood.• Remove junction box cover and knockout. Installstrain relief.