How to Replace an Under Cabinet Range Hood

On this page (8 sections)

1. What should you check before replacing an under cabinet range hood?
2. What tools and supplies might you need?
3. How do you remove the old range hood safely?
4. How do you install the replacement hood?
5. How do you check the new hood after installation?
6. Which replacement hood fits your installation?
7. When should you hire an installer?
8. What is the safest way to finish a range hood replacement?

To replace an under cabinet range hood, match the new hood to the cabinet opening, vent route, and electrical setup, then disconnect power before removing the old unit. Secure and seal the new hood according to its instructions.

The job is easier when you confirm fit and venting before taking the old hood down. If the new unit needs cabinet work, new wiring, or a changed duct route, plan for a qualified installer.

What should you check before replacing an under cabinet range hood?

Check the width, depth, height, vent outlet, and power connection before choosing a replacement. The new hood must fit under the cabinet and connect to a vent path its instructions allow.

Measure the existing hood and the available cabinet space. Also measure the distance from the cooking surface, then compare it with the hood maker's installation guidance.

For help choosing a size, see what size range hood you need and how deep a range hood should be. Check how high a range hood should be above the stove before setting the final position.

Which vent details matter for a replacement?

Match the hood's outlet to the existing duct route whenever possible. Note whether the duct exits upward or through the wall, and measure its shape and size.

A hood with multiple vent options can offer more flexibility, but it still needs a compatible path and a secure connection. Don't block an outlet or reduce the duct in a way the installation instructions prohibit.

If you want to change from ducted to recirculating operation, check whether the new hood supports that setup and which filters it requires. Our guide to convertible versus ducted range hoods explains the difference.

What tools and supplies might you need?

Gather basic hand tools, a stable support, and materials specified in the hood instructions. The exact tools depend on the old mounting hardware, the new hood, and the duct connection.

Common needs include a screwdriver, measuring tape, a helper to hold the hood, and approved duct tape or fasteners for the vent. Keep the new hood's mounting template and instructions nearby.

Some hoods include adapters, mounting hardware, or ducting, while others require separate parts. Check the included items and required supplies before starting; don't assume the old adapter will fit the new outlet.

How do you remove the old range hood safely?

Turn off the hood's power at the breaker and confirm it is off before disconnecting anything. If the hood plugs into an accessible outlet, unplug it after switching off the breaker.

Remove the filters and any parts that obstruct access to the mounting screws. Have another person support the hood while you remove the fasteners, since the unit can drop once the last screw is loose.

Disconnect the duct carefully and lower the old hood. If you find damaged wiring, an unfamiliar hardwired connection, or signs of heat damage, stop and contact a qualified electrician.

How do you install the replacement hood?

Follow the new hood's instructions to attach its outlet adapter, position it, and secure it to the cabinet. Have a helper hold the unit while you fasten it through the proper mounting points.

Check that the hood is level and centered over the cooking area. Use the supplied mounting pattern when available, and make sure the cabinet material can support the hood as instructed.

Reconnect the duct without crushing or sharply bending it. Seal the joint with the material the hood instructions call for, and make sure the duct path is open.

How do you connect power?

Reconnect power only using the method specified for the new hood. Match the hood's plug or wiring setup to the home's existing connection, and keep electrical parts away from the duct opening.

Don't modify a plug, splice wires, or guess at wire connections. If the new hood's electrical setup differs from the old one, have a qualified electrician handle the change.

How do you check the new hood after installation?

Restore power and test each fan speed and light before using the cooktop. Listen for unusual vibration and check that air moves through the vent as expected.

Inspect the duct connection for looseness and confirm that the hood stays firmly mounted. If airflow seems weak, switch off the unit and check for a closed damper, blocked duct, or installation issue.

A fan that runs but doesn't move air may point to a vent connection or damper problem. For a different symptom, see range hood fan not working but the light is.

Which replacement hood fits your installation?

Choose a hood based on the cabinet space, vent route, and features you need to connect. These options illustrate different fit considerations; check their dimensions and installation instructions against your kitchen before buying.

The Broan-NuTone PrintGuard Convertible 30 Inch measures 30 in wide, 17.5 in deep, and 6 in high. It supports 4-way convertibility and has a removable, dishwasher-safe aluminum filter.

The COSMO COS-5MU30 Delta 30 Inch measures 29.75 in wide, 19.75 in deep, and 5.5 in high. It supports top or back venting and uses a 5 in round exhaust duct; ductless conversion requires an optional carbon filter kit.

The Hauslane UC-PS18 30 Inch measures 29.75 in wide, 22 in deep, and 8.125 in high. Its included adapters support vertical 6 in round, vertical 3.25 x 10 in rectangular, or horizontal 3.25 x 10 in venting.

When should you hire an installer?

Hire a qualified installer if the replacement requires wiring changes, cabinet alterations, or a new duct route. These changes can affect the hood's support, power connection, and ability to vent properly.

Get help if you cannot safely support the hood during removal or installation. Stop if the cabinet is damaged, the duct is blocked inside a wall, or the wiring does not match the installation instructions.

What is the safest way to finish a range hood replacement?

For how to replace an under cabinet range hood, measure first, match the outlet and power setup, and follow the new hood's instructions from removal through testing. Use a professional when the job involves electrical or structural changes.

Pick a replacement with dimensions and vent options that suit your kitchen, then review range hood height above the stove before securing it. After installation, test the fan and light and check the duct connection.

Frequently asked questions

Can I replace an under cabinet range hood myself?

You may be able to replace a hood when the new unit fits the existing cabinet and vent opening, and the electrical connection is compatible. Turn off power at the breaker before removal.

If wiring, cabinet changes, or duct changes are needed, use a qualified electrician or installer.

Do I need to replace the duct when replacing a range hood?

Not always. You can often keep a sound, correctly sized duct that matches the new hood's outlet, but check the hood instructions and inspect the path for damage or blockage.

A different outlet shape or location may require an adapter or ductwork changes.

How do I measure for a replacement range hood?

Measure the hood's width, depth, and height, plus the cabinet opening and the distance from the cooktop. Check where the duct exits and its shape and size.

Compare these measurements with the new hood's installation instructions before buying.

Can I change a ducted hood to ductless?

Sometimes, if the hood supports ductless conversion and has the required filters. Check its instructions for the right conversion kit and installation steps.

Ductless operation returns filtered air to the room, so it does not vent cooking air outdoors.