Cut a hole in the wall where you plan to install the duct work. Cut the hole to a 6-inch diameter or to the specified diameter of the duct work supplied with your range hood. Use a reciprocating saw to cut the hole. In some cases, you may need to cut the hole in the roof, depending on where the range is located in the kitchen.
Slide the vent cap onto the end of the vent hose, and secure the cap to the hose with the supplied fasteners and a screwdriver. In most cases, the fastener is a band clamp.
Slide the vent hose in through the wall until the vent cap butts up against the outside of the wall.
Secure the framing to the wall and under the cabinets centered directly above your range. If you're replacing an existing hood, the framing is already in place. Use 2-inch by 4-inch framing lumber for the frame.
Center the mounting bracket for the hood over the range and on the wooden framing. Secure the bracket to the wood framing, using wood screws and a screwdriver.
Hang the rectangular cutout on the back of the range hood onto the mounting bracket. The hood must rest between 24 and 30 inches above the range.
Secure the hood height adjustment screws to the mounting bracket. Adjust the hood so it rests level on the wall, and then secure the hood to the mounting bracket with the supplied screws.
Secure the electrical plate to the top of the range, using the supplied screws and a screwdriver. Once the plate is installed, plug the electrical cord of the hood into a grounded 110-volt electrical outlet.
Secure the flue mounting bracket to the top of the range hood, and then secure the ceiling/wall flue to the wall with the supplied hardware and screws.
Secure the 6-inch duct work between the two flue mounting brackets with the supplied hardware and screwdriver. Again, the fasteners are usually band clamps.
Secure the decorative flue cover over the duct work to hide it. Use the screws provided with the range hood.