How to Install a Range Hood: A Complete Step-by-Step Guide

Size & Coverage: Your range hood should be at least as wide as your cooktop. Ideally, it should extend 3 inches beyond each side for optimal smoke and grease capture. Measure your stove carefully before buying.

CFM Rating: The airflow capacity of a range hood is measured in Cubic Feet per Minute (CFM). A higher CFM means more powerful ventilation. For standard cooking, 300–400 CFM is sufficient; heavy-duty or commercial-style stoves may require 600 CFM or more.

Mounting Height: Most manufacturers recommend installing the hood between 24 and 36 inches above the cooktop surface. Always consult your specific model's instructions for the recommended height.

Venting Configuration: Decide whether you'll vent through the wall, through the roof, or use a ductless recirculating setup. This will affect both the complexity and cost of your installation.

Local Codes & Permits: Check your local building codes and regulations for ventilation requirements. Some jurisdictions require permits or inspections for range hood installations, especially those involving electrical or ductwork modifications.

Step 1: Shut Off Power and Disconnect Wiring

Head to your electrical breaker panel and switch off the circuit that supplies power to the range hood. Use a non-contact voltage tester at the installation site to confirm there's no live current. Once verified, carefully disconnect and remove all existing electrical wiring connected to the old unit.

Step 2: Remove the Old Range Hood

With the power fully disconnected, unscrew the mounting hardware securing the old hood. If it's a two-person job, have a helper support the weight while you detach the screws. Carefully lower and set the old unit aside.

Step 3: Locate and Mark the Vent Position

Your vent position will be determined by the design specifications of your new range hood. If the hood comes with a mounting template, tape it to the wall or underside of the cabinet above. Use a level and pencil to mark the exact center point and the locations of all mounting screw holes.

Step 4: Inspect the Wall Where the Vent Will Be Installed

Before cutting, examine the area behind the wall where the vent opening will go. Check for existing plumbing lines, electrical conduit, or structural framing that could interfere. Use a stud finder to detect hidden obstacles. If you encounter plumbing or wiring, you may need to reroute the vent to a different location.

Step 5: Cut the Interior Hole for the Vent

After confirming the wall cavity is clear of obstructions, use a jigsaw or keyhole saw to cut the vent hole. Trace the outline using the vent cap or pipe as your template. Cut slightly larger than needed to allow for minor adjustments during fitting. With a long drill bit, bore a locator hole through to the exterior to guide your outside cut.

Step 6: Cut the Exterior Vent Pipe Hole

Using the locator hole as your reference point on the exterior wall, mark and cut the outside opening. Fit the vent pipe into the wall to verify alignment from both sides. Apply caulking around the exterior opening to create a weather-tight seal before attaching the vent cover.

Step 7: Attach the Duct or Range Hood Vent Cap

Insert the vent pipe into the exterior opening, ensuring it sits flush. The vent cap should be long enough to reach your range hood's exhaust port on the interior side. Secure it with screws, then seal the edges with weatherproof caulk and metal foil duct tape to prevent air leaks.

Step 8: Prepare the Damper

Some range hoods come equipped with a built-in damper. If yours has one, inspect it closely for free movement. Place a small piece of duct tape on the damper flap to reduce noise from vibration. If your hood does not include a damper, install one in the ductwork to prevent backdrafts of outside air entering your kitchen.

Step 9: Run the Electrical Wiring

Route the electrical wiring from the junction box to the hood's location. If new wiring is necessary, you can pull cable from either end of the circuit to make the connection. Ensure there's sufficient wire length with enough slack for comfortable connections. The wiring should be properly secured and kept away from the vent duct to avoid heat damage.

Step 10: Position the New Range Hood and Secure Mounting Screws

With everything prepped, lift the new range hood into position. If you previously removed a grease filter to access the mounting area, this will give you better visibility. Thread the mounting screws through the hood and into the wall studs or mounting bracket. Tighten them securely but be careful not to over-torque and strip the threads.

Step 11: Complete the Electrical Connection

Once the hood is firmly in place, connect the electrical wires. Match black to black (hot), white to white (neutral), and attach the bare copper or green wire to the grounding screw. Twist the wire ends together and secure each connection with wire nuts. Tuck the completed connections neatly into the electrical housing and replace the cover plate.

Step 12: Install the Vent Covers

Once all wiring is complete and connected, flip the power back on at the breaker panel. Test the range hood's fan speeds, lighting, and any other features to confirm everything operates correctly. Reinstall the grease filters and any decorative vent covers included with your model. Your installation is now complete.

Can I install a range hood myself?

Installing a range hood yourself is absolutely doable if you have basic DIY skills and the proper tools. That said, installation complexity varies by model. Simple under-cabinet replacements are fairly straightforward, while installations that require new ductwork or electrical wiring may call for professional assistance. If the project involves running wire through the attic or walls, or cutting through the roof, hiring a licensed professional is strongly recommended.

Do range hoods have to be vented outside?

Not necessarily. The answer depends on your kitchen layout and local building codes. Ducted range hoods vent directly outside and are considered the most effective option for removing grease, heat, and odors from your home. However, ductless range hoods use charcoal or carbon filters to recirculate cleaned air back into the kitchen — a perfectly viable solution when exterior venting isn't practical.

Do you need a vent hood for an electric stove?

Whether you're cooking on a gas or electric range, particles such as grease, steam, food odors, and smoke are released into the air. We strongly recommend installing a vent hood regardless of the type of range or stove you use. Even on electric stoves, cooking oils and food residue produce airborne contaminants that benefit from proper extraction.

Do you need an electrician to install a range hood?

If you're experienced with basic home renovation and comfortable working with electrical wiring, you may be able to complete the installation on your own. However, if the work requires installing a new dedicated circuit, running wire through walls, or if you're simply not confident handling electrical connections, it's best to hire a licensed electrician. Safety should always come first with any electrical project.

Are range hoods plugged in or hard-wired?

Both options exist depending on the model. Hard-wiring is generally the recommended approach as it creates a cleaner, more permanent installation. However, if your range hood comes with a standard three-prong power cord, it can simply be plugged into a nearby outlet — no hard-wiring required.

Can range hoods be vented through the wall?

Yes, wall venting is one of the most common and practical methods for exhausting kitchen air. Most range hoods can be configured for either wall venting or roof venting, depending on your kitchen's structure. As a general rule, the shorter and more direct the duct path from your hood to the exterior, the better the ventilation performance. Fewer bends and shorter runs mean less airflow resistance and quieter operation.