How To Install A Range Hood Vent Through The Wall (5 Steps)

Range Hood Venting Options

The ducting may run horizontally or vertically depending on your type of hood. Island hoods must vent through the ceiling, while wall hoods can vent through the wall or ceiling.

Installing Range Hood with Horizontal Duct

You have two options to vent your wall hood horizontally.

Installing Range Hood with Vertical Duct

You can also vent your wall hood through the ceiling, as in the diagram below.

Unlike wall hoods, island hoods can only vent through the ceiling.

You may be wondering: which venting option is the best?

The best ducting option for your range hood will depend on your kitchen design. But there are several things you can do to maximize the efficiency of your range hood duct.

Step 3. Drill A Pilot Hole Through Wall

The easiest way to line up the hole from the inside and outside is to cut a pilot hole straight through the middle of the range hood vent. You can do this with either a long wood or metal drill bit.

Many times it is not possible to cut the range hood vent hole completely from the interior — so you will need to do half on the inside and half on the outside.

But it is near impossible to mark out the vent perimeter on the exterior wall without a pilot hole drilled from the interior.

A pilot hole will allow you to mark the perimeter, and stay aligned with the cut.

Also, if you are using a hole saw for the cut, many of these hole saw bits come with pilot drill bits in the middle. But these pilot bits aren’t for completely cutting through the wall (they are too short) but they simply help the hole saw get started and aligned.

Read Also: What Are The Best Under Cabinet Range Hoods?


How to connect a range hood vent through an exterior wall? 

 It is not a difficult task to install a range hood vent over the stove in the kitchen as it seems to be. First, prepare yourself for the work by wearing gloves and a mask because the wall drilling produces a lot of dust.

Make an access hole on an interior side

You can start by marking a point for the hole on the interior side of the wall. 

Then, create an access hole of almost 2 to 3 inches by using a hole saw to see whether wires and pipes of gas and electricity are present behind the wall or not.

You can use this device for a wooden wall and a hammer for a brick wall. 

You can move further in the installation process if you observe no wiring at a place of vent installation, or you can change their route.

Drill a pilot hole and cut the wall

Drill a pilot hole on the inner wall for lining up the hole from the inner to outer side by using a drill of metal. 

You can sometimes face problems cutting the wall due to its thickness, so you must cut it from both sides.

The drilling point on the interior side helps mark the hole to quickly cut the wall from the outside.

Moreover, a hole saw contains a drill bit in the center that helps create a hole in the middle. It cannot cut the wall but defines the boundary and aligns the hole.

First, you can use a round shape hole saw for generating a hole in the wall if your range hood vent is round. Secondly, you can draw multiple holes in the wall to outline the vent.

The number of holes varies, but ideally, 8 to 9 holes are created. I preferably utilized a reciprocating saw for making a hole in the wall for my square shape vent.

Install vent cap

Add a vent cap on the exterior side of the wall to prevent the entry of air and rain inside the kitchen. 

You can add an insulation sheet of PVC before attaching this cover to the wall to protect the range hood from the entry of dust particles and for air filtration purposes.

I am using a square-shaped hood with a flap inside, and this flap opens up when it is turned on.

You can secure the cover by attaching PVC with caulk on the wall surface. I have applied tape to secure the PVC on the exterior wall. After that, connect the vent cap with the help of an aluminum sheet or screws to tighten it up with the wall.

It prevents the leakage of air and smoke from coming from inside the kitchen.

Add duct of the hood vent to cap

Duct dampers are present in the range hood setup attached to the vent cap after fixing the lid on the exterior side. 

Cut a piece of the damper by keeping the diameter of the hole in mind.

Attach the duct with the vent cap and secure it by using tape. Check the size of the duct and ensure that it gets fixed properly to avoid problematic situations after the installation of the hood.

Connect wires of the range hood to the wall

Black and white wires are present with the hood that needs to be connected with the electrical wiring to make it functional.

You can connect the black wires with the black one of the switch and the white with white wires accordingly. The secure connection ensures the proper working of the range hood.

Fix a range hood to vent duct

Add a range hood to the duct and fix it with the help of screws. It is better to mark the holes to attach them perfectly in the center before attaching the range hood.

Put screws in the holes and attach the hood vent and tighten them; otherwise, the hood can make noise. You may need help at this step to fix the vent correctly in position. Then, put the screws to attach them to the wall surface.

Add filter and the motor

Put a filter in the range hood vent by choosing an appropriate product like a charcoal filter, stainless steel, or aluminum mesh.

Then, they can keep the air clean in the kitchen by filtering the bad odors and throwing them out to the exterior side.

Moreover, Charcoal filters are present in the ductless range hoods and are found in smaller kitchens of the apartment and a townhome.

Stainless steel filters are more cost-effective and are efficient in filtering the air. However, my friend tried mesh filters that are more reliable and efficient in sucking smoke from the inside air.

Furthermore, you can fix the motor in the hood after connecting all the system parts. These exhaust fans or a ventilation system suck fumes and blow them out.

How far should a range hood stick out?

A range hood should stick out at a minimum half the length of your kitchen range and typically does not extend past its full length.

Step 4. Install The Range Hood Vent Cover

Once you have cut the wall hole and put through the vent pipe, you will have to install the exterior hood cover. The vent cover is what prevents rain, pests, and air infiltration from going inside the home.

Exterior hoods have either round or square flaps that open when the range hood is on, but the flap closes when it is turned off.

First you will have to connect the end of the vent pipe to the collar of the exterior hood cover — you can use aluminum tape to secure it. You can use screws to connect the vent pipe, but they aren’t supposed to .

After securing the pipe to the hood, you will need to use screws to fasten the hood the exterior wall. Before you completely screw in the hood, make sure to thoroughly caulk behind the hood cover to prevent air and water leakage.

How To Deal With Uneven Siding

If you are installing the range hood vent through siding, it will be difficult or impossible to get a tight seal on the exterior vent hood. Basically, since the siding isn’t perfectly flat, it will be hard to properly install caulking in-between the hood and the siding.

To solve this problem, you will need to cut out a square portion of the siding, and insert a square piece of wood or PVC. In the middle, you will need to cut out a hole for the vent to go through.

After you have screwed in this wood backing, you will have a flat surface to install the range hood vent, and to properly caulk behind it.

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