
Ft. Over-the-Range Microwave Oven HOOD EXHAUST DUCT: Outside ventilation requires a HOOD EXHAUST DUCT. Read the following carefully. EXHAUST CONNECTION: The hood exhaust has been designed to mate with a standard 3-1/4" x 10" rectangular duct.lf a round duct is required, a rectangular-to-round transition adaptor must be used. Do not use less than a 6" diameter duct REAR EXHAUST: If a rear or horizontal exhaust is to be used, care should be taken to align exhaust with space between studs,or wal