A new range hood can make your kitchen quieter, cleaner, and much more comfortable when you cook. Replacing one is often a manageable DIY job, but the details matter: the new hood has to fit the space, connect safely to power, and vent air the right way. Here’s how to plan the job and work through it in three clear steps.
Table of Contents
Before you start: check what kind of hood you have
Range hoods remove smoke, grease, heat, and cooking smells. Some send the air outdoors through a duct. Others pull it through a filter and return it to the kitchen. That difference affects what you can install, so take a look before buying a replacement.
- Ducted hood: Connects to a duct that carries air outside through a wall or roof.
- Ductless hood: Uses filters to capture some grease and odors, then sends air back into the room. It needs regular filter replacement.
- Convertible hood: Can usually be set up for either ducted or ductless use, depending on the model and available parts.
Also identify how the hood is mounted. A common under-cabinet hood attaches to the cabinet above the stove. A wall-mounted hood attaches to the wall, while an insert fits inside a decorative cover. Replacing a hood with the same style is usually simpler than changing the layout, duct route, or electrical setup.
Before you shop, read the hood’s installation instructions and check your local building requirements. The manufacturer’s instructions set the required mounting height, duct size, and electrical connection for that particular model. Don’t assume a measurement from your old hood applies to the new one.
Step 1: Choose a compatible replacement and prepare the area
Measure the opening and check the duct
Measure the width of the existing hood and the space where it sits. Many hoods are made to fit common range widths, but the cabinet opening and mounting points can still differ. Check the hood’s depth and height, too, especially if cabinets are close to the stove or the new hood has a larger body.
Next, find out where the existing duct goes. It may exit through the back wall, the top of the hood, or a cabinet above it. If you can see the duct connection, measure its shape and diameter. A replacement that matches the existing route can save a lot of work. If the new hood’s outlet doesn’t line up, you may need an approved adapter or duct changes.
Use rigid, smooth metal duct where the manufacturer and local rules call for it. Long, narrow, crushed, or sharply bent ducting can restrict airflow and make the hood louder. Never vent cooking exhaust into an attic, crawlspace, wall cavity, or garage. A ducted hood should carry air to an approved outdoor termination.
Check the hood’s power and features
Look at how the old hood receives power. It may plug into an outlet inside a cabinet, or it may be connected directly to household wiring. The replacement needs to be compatible with the available power connection and the electrical requirements listed in its manual. If you’re unsure what you’re looking at, take a photo before removing anything and ask a qualified electrician.
Compare useful features, not just appearance. Consider fan speed, lighting, filter access, noise information, and whether the hood supports your existing duct arrangement. A more powerful fan won’t help much if the duct is too restrictive. A hood that’s easy to reach and clean is often a better everyday choice than one with features you’ll rarely use.
| What to check | Why it matters |
|---|---|
| Hood width and depth | The hood needs to fit the available space and cover the cooking area as intended. |
| Mounting style | Under-cabinet, wall-mounted, and insert models use different supports and installation steps. |
| Duct route and size | A matching outlet can reduce extra duct work and help maintain airflow. |
| Electrical connection | The hood must match the available supply and be connected according to its instructions. |
| Required mounting height | The right distance depends on the hood, cooktop, and applicable instructions or codes. |
Gather tools and make the work area safe
You may need a screwdriver, drill, tape measure, pencil, wire connectors approved for the job, a voltage tester, and a step stool or ladder. Keep the new hood’s manual nearby. It will show the mounting points, wiring arrangement, and duct connection for that model.
Clear the stovetop and nearby counters. Protect the cooktop with a thick towel or a piece of cardboard so a dropped screw or tool doesn’t scratch the surface. Range hoods can be awkward to hold, so arrange for another adult to help lift and support the old unit and the new one.
Turn off power to the hood at the circuit breaker before removing it. A wall switch is not enough. Use a suitable voltage tester to confirm the wires are not live before touching them. If you can’t confidently identify the circuit or verify that power is off, stop and call an electrician.
Step 2: Remove the old hood
Take out the grease filters and, if the manual allows, remove the bulbs or light covers. This can make the hood lighter and gives you better access to the fasteners. If the hood plugs into an outlet, unplug it once you’ve confirmed the power is off. If it is hardwired, leave the wires alone until you’re certain power is off and you’re comfortable following the manufacturer’s wiring instructions.
Ask your helper to hold the hood steady while you loosen its mounting screws. Don’t remove every screw while standing underneath an unsupported hood. Once the fasteners are loose, lower the unit carefully and set it somewhere stable.
Disconnect the duct connection without bending or crushing the duct. Then inspect the area behind and above the hood. Look for grease buildup, loose or damaged wiring, water marks, a broken cabinet bottom, or ducting that has come apart. Clean accessible grease with a suitable cleaner, and let the area dry before installing the replacement.
If the cabinet or wall that supports the hood is damaged, repair it before moving on. The mounting surface needs to hold the hood securely over the cooking area. Don’t rely on a thin or broken panel to support the weight.
Step 3: Mount and connect the new hood
Prepare the new hood before lifting it
Unpack the hood and check that the parts match the installation list. Remove packaging, fit any required outlet adapter, and set the vent direction if the model allows more than one option. Some hoods have removable plates for top or rear venting; the instructions will explain which parts to move or remove.
Mark the mounting points using the template or measurements supplied with the hood. Check that the marks line up with solid cabinet or wall support, and confirm the hood will sit at the required height above the cooking surface. Mounting height isn’t one-size-fits-all: follow the hood and range instructions and any local rules, particularly for a gas cooktop.
Secure the hood and connect the duct
With your helper supporting the hood, lift it into position and start the mounting screws. Check that it sits level and that the fasteners are secure before letting go. Use only the mounting points and hardware specified by the manufacturer. If the hood requires a support bracket, install it as directed.
Connect the duct to the hood’s outlet. The connection should be secure and sealed with the appropriate duct materials, such as foil duct tape where permitted by the instructions. Avoid leaving gaps that can leak greasy air into a cabinet. Keep the duct as straight and smooth as practical, and don’t force an undersized duct onto a larger outlet unless the manufacturer specifically allows that setup.
Reconnect power carefully
If the hood uses a plug, connect it to the appropriate outlet as described in the manual and keep the cord away from hot surfaces and moving parts. For hardwired models, the connections must follow the hood’s diagram, the home’s wiring, and local electrical requirements. Wire colors and arrangements can vary, so don’t guess based on the old hood or a photo online.
If you’re not experienced with electrical work, have an electrician make the hardwired connection. That’s especially wise if you find damaged insulation, unfamiliar wiring, no clear grounding connection, or an electrical box that doesn’t suit the new hood. Replace covers and close the wiring compartment before restoring power.
Test the range hood before you finish
Turn the breaker back on and test the lights and every fan setting. Listen for rattling, scraping, or an unusually loud hum. A loose filter, a tool left inside, a misaligned fan, or ductwork touching the hood can cause noise, so turn the power off again before checking inside.
For a ducted hood, check that air is moving toward the outdoor vent. If you can safely see the exterior outlet, confirm that its flap opens while the fan is running and closes afterward. Weak airflow may point to a blocked duct, a connection that came loose, or an installation problem. Don’t put your hand near the fan or reach into the duct while the unit is on.
For a ductless hood, confirm that the correct filters are installed in the direction shown by the manufacturer. The hood may still leave some cooking odors behind; recirculating filters reduce certain odors but don’t carry heat and moisture outdoors like a ducted system can.
Once everything works, refit the filters and clean fingerprints from the hood. Keep the manual and note the filter type and replacement schedule. Washing reusable grease filters and replacing charcoal filters when needed helps maintain airflow and keeps the fan from working harder than it should.
When to call a professional
Replacing a like-for-like hood is often straightforward, but some situations call for a contractor or electrician. Get professional help if the new hood requires a different duct route, a new roof or wall opening, cabinet changes, or a hardwired connection you don’t know how to make safely.
It’s also worth calling someone if the old duct appears to be hidden or disconnected, the mounting surface is weak, or you find signs of water or heat damage. Fixing the cause matters more than covering it with a new hood. A professional can check that the duct, support, and electrical setup are suitable for the replacement.
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Frequently Asked Questions
Can I replace a range hood myself?
Often, yes, if the replacement fits the existing opening, mounting style, duct route, and electrical setup. Have someone help with lifting, shut off power at the breaker, and follow the model’s instructions. Hire a professional if electrical or duct changes are needed and you’re not equipped to do them safely.
Can I install a ductless hood where the old hood was ducted?
That may be possible if the new model supports ductless operation and you install the correct filters and cover plates. Check the manual before buying. A ductless hood recirculates air, while a ducted hood sends exhaust outdoors, so they don’t perform the same job.
Does the new hood have to be the same size as the old one?
It needs to fit the available space and be suitable for the cooking surface, but it doesn’t always have to match the old hood exactly. Check the manufacturer’s sizing and clearance guidance, plus the cabinet dimensions and duct position, before choosing a different width or style.
Why is my new range hood noisy or weak?
Check for a loose filter, an unsecured duct connection, or ducting that is blocked, crushed, or too restrictive for the hood. A fan can also rattle if the unit isn’t mounted firmly. Switch off power before inspecting the hood, and contact the installer or manufacturer if the cause isn’t clear.
Conclusion
Replacing a range hood comes down to choosing a compatible model, removing the old unit safely, and installing the new one according to its instructions. Pay close attention to the mounting support, duct route, required height, and electrical connection. Take your time, get help with the lifting, and bring in a professional whenever the wiring or venting is beyond your comfort level.
