Frigidaire FH36DD50MS Use and Care Manual - Page 11

INSTALLATION 6. Install Ductwork - Use galvanized or aluminum duct in 6" round or 3 ¼" x 10" size, or a combination of both. PVC duct should be used if installing under a poured concrete slab. Use the shortest and straightest duct run possible. The system will operate most efficiently when the ductwork does not exceed 60 feet of equivalent duct. The downdraft will operate properly with ductwork up to 100 equivalent feet of duct. See page 12 for Calculated Duct Length Table.  NOTE Local building codes must be followed in specifying approved type and specification of ALL duct used. Always use an appropriate roof or wall cap with damper. IMPORTANT All ductworks must be installed as per local codes. Duct Tape Over Seam and Screw DUCT THROUGH-THE-FLOOR Air Flow 7. Connect Downdraft to Power - Plug the downdraft's power cord into the outlet. - Make sure the power cord is routed beneath the appliance and away from heat generated by the cooktop. Screw DUCT TAPE OVER SEAM AND SCREW 8. Install Cooktop - Align the cooktop with the downdraft and fasten cooktop in place.  NOTE Accurate alignment of cooktop and downdraft is necessary to ensure that there is no interference when air vent is raised and lowered. There should be a gap of 1/8" between the back of the cooktop and the front of the downdraft cover. DUCT ON-THE-FLOOR 11