Step 1: Shut off Power and Disconnect Wiring
Turn off the switch at the breaker box that powers the range hood. Next, unplug the range hood and disconnect all electrical wiring.
Step 2: Remove Old Range Hood
With the help of a second person, unscrew the support screws while the second person supports the weight of the range hood.
Step 3: Locate and Mark Vent Location
Your vent location will be determined by the measurements of your range hood. If the hood came with a paper template, you can tape it to the wall as a reference point to see where the new vent location will be.
Step 4: Check Wall where Vent will be Installed
There should be no plumbing or electrical wiring behind the wall of where the vent location will be, so first cut a small hole to check that nothing will interfere with the venting. If you find any plumbing or wiring, you'll want to consult with a professional, since you may have to vent through the roof.
Note: If your vented range hood is going to be installed above a kitchen island, the vent will have to be installed in the ceiling and through the roof. Venting through the roof is a different process and may require a professional installation.
Step 5: Cut Interior Hole of the Vent
If, after checking through the small hole you don't find any plumbing or wiring, you can proceed to cut out the bigger hole for your vent. With a jigsaw or keyhole saw, cut a hole that's at least six inches wide or slightly bigger if you want more room to work with. Next, with a long drill bit, place locator holes on the edges of the vent hole that extend to the exterior of the home.
Step 6: Cut Exterior Vent Pipe Hole
Using the locator holes as reference points, connect each dot with the pencil to form the circle that you'll be cutting out with the jigsaw. If the exterior of your home is paneled, you can use a piece of PVC trim to create an even surface to cut the hole through.
Step 7: Attach the Duct/Range Hood Vent Cap
Attach the vent cap into the exterior opening, making sure that it's long enough to reach the range hood. Attach with screws and use the caulk gun and weatherproof caulking compound to get a tight seal.
Step 8: Prepare the Damper
Some vent hoods are equipped with a damper. If yours has one, measure it against the interior hole to see how much space you need for the duct size. First use a small piece of duct to make sure you have the correct measurements prior to cutting the bigger piece of duct.
Step 9: Run Electrical Wiring
Run the electrical wiring from the hood to the electrical box. If necessary, you can drill holes next to each side of the vent to make it easier to run the wiring. There should be enough conduit and wires from the breaker to the hood's electrical terminal box.
Step 10: Position New Range Hood and Secure Mounting Screws
With the second person that helped you remove the old range hood, place the mounting screws through the mounting slots of the hood. Next, remove the grease filter to give you better access to the screws when you tighten. Level the hood first, and tighten the upper screws before securing the bottom screws.
Step 11: Finish Electrical Connection
Strip back the wires to connect them with wire connectors, making sure to clip any excess wiring. Match the color of the wiring to the corresponding color connector and the copper ground wire to the grounding wire connector.
Step 12: Install Vent Covers
Once the wiring has been connected, turn the power back on at the breaker box to make sure that the hood is working properly. Install the vent covers using your owner's manual for specific instructions. After this, your installation is complete!