How to Install a Hood Vent? | Ducted or Ductless, Done Right

The details of how to install a hood vent change with the type you own — ducted or ductless — but the core sequence stays the same: shut off power, place the hood, cut the opening, mount, wire, and test. Ducted hoods push fumes outside through wall or ceiling ductwork; ductless models recirculate air through charcoal filters. Both styles follow the step order below.

What To Check Before You Cut

Before cutting, confirm the hood fits the cooktop and the wall cavity is clear of wiring and plumbing. Home Depot’s guide says the hood should extend about 1 inch past the stovetop on all four sides, so measure your cooktop before ordering. KitchenAid recommends marking the vent position with the hood’s template, then cutting a small inspection hole to check for obstructions behind the drywall — hidden wires and pipes are the most common surprise.

Check for studs and joists before choosing the mounting spot. Wall-mounted and under-cabinet hoods are the most DIY-friendly; island and ceiling configurations add structural work. Ducted installs need the shortest, most direct route using rigid metal ducting: never terminate into an attic or crawlspace, seal every joint with foil tape (standard duct tape fails under heat), and each 90-degree bend costs airflow. Local code may dictate duct size, termination, and makeup air requirements. If the project is a car rather than a kitchen, the best vehicle hood vents in our tested roundup are a different product with a different install process.

Range Hood Installation, Step By Step

With the location marked and cavity inspected, the install runs in a fixed order: remove the old unit, cut the opening, mount the hood, connect ductwork, and wire it. KitchenAid’s installation guide sets the sequence, and Home Depot’s version agrees.

1. Shut off the breaker and disconnect the old wiring, then remove the existing hood with a helper — it’s heavier than it looks.
2. Unpack the new hood and remove the filter, fan, and electrical cover so inner parts are reachable and the unit is easier to lift.
3. Mark the duct and cable holes with the template or measurements, remove the knockouts, then drill locator holes through to the exterior to transfer the cutout.
4. Cut a small inspection hole, confirm nothing is in the way, then cut the full vent opening.
5. Install the exterior vent cap with screws and weatherproof caulk, running the cable at the same time.
6. Mount the hood to studs or adjacent cabinets and level it before tightening. On masonry, use a masonry bit and masonry screws.
7. Connect the ductwork, matching the damper and duct diameter to the vent opening, and seal every joint with foil tape.

Vent-A-Hood’s wall mount instructions cover model-specific details like insert adapters, so check your manual before starting.

How Do You Wire, Seal, And Test?

Electrical work is a straight color-to-color splice on a dedicated circuit, but only after everything else is done. KitchenAid’s procedure is explicit: connect white to white, black to black, and ground to green, then restore power only when complete. Leave the breaker off while you reinstall the electrical cover, fan, and filter, and use the strain-relief clamp that ships with the unit where the cable enters the hood.

Sealing is where most installs leak. Weatherproof caulk goes around the exterior vent cap, and foil tape seals duct joints — never standard duct tape. Then run the real test: each fan speed should push air visibly through the exterior vent, and the hood should sit level and vibration-free.

If air moves freely and the hood runs quiet and level, the installation is done. When the route crosses a load-bearing wall or the wiring makes you hesitate, a licensed pro can finish in a few hours — worthwhile for fire-safety stakes.