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How to Ventilate a Range Hood on an Interior Wall?

How to Ventilate a Range Hood on an Interior Wall?

Issue Time:2022/06/01
The most common way to install a range hood is on an interior wall. Both wall-mounted range hoods and under-cabinet range hoods can be ventilated on the interior walls.

Venting a range hood on an interior wall can seem daunting. However, if you prefer to DIY, you can save money by installing it yourself. If not, we recommend hiring a local contractor to install the hood. Installing the plumbing was the hardest part.

That being said, with a little research, the average homeowner can tackle this project. Just follow these five steps.

Determine where you want to ventilate your range hood.

To ventilate the range hood on the interior wall, you will need to cut a hole in the wall for the ductwork. Therefore, it is important that you know exactly where the exhaust of the range hood is located before proceeding with the installation.

Remember, you can always cut a larger hole if needed. But if you cut a hole that's too big, you can't put the wall back.

The larger the CFM of the cooker hood, the larger the duct diameter you will need. Otherwise, your ducts will block the air as it moves to the outside. Expelling the same amount of air through a smaller duct puts more pressure on the motor than a larger duct.

Your hood won't be able to move the amount of air advertised. For example, a 900 cfm hood attached to ductwork smaller than 8 inches will not be able to move 900 cubic feet of air in one minute.

Install your plumbing system on the shortest unobstructed path to the outside of your home.

Ideally, your pipe should have no more than two elbows. If there are more than two bends, your exhaust system will have too much resistance to effectively vent all the greasy air outside.

To reduce the number of bends you need, choose a path that avoids studs, wires, and other obstacles.

Also, keep the length of the ductwork to 30 feet or less. This ensures that the air in your kitchen escapes easily.

Installing ductwork from the hood to the outside can be tricky. Ideally, you want to be able to have access points in your ductwork that you can run through ceilings or walls.

If you can jump into an attic or basement, these are usually the easiest places to run plumbing.

Otherwise, you may have to select a few areas to cut out access points in the ceiling or wall to complete the installation. Before you dig a hole in your home, consult a contractor if you're not sure what's inside the wall you're cutting. 

Cut a hole 1-2 inches larger than your piping system and you will run the piping from the hood.

Your range hood will be used for years to come, so you want it to fit comfortably in your kitchen.

An inch or two gives you room to run the ductwork through the hole so you can easily attach it to the hood.

Connect the cooker hood to the ductwork.

After threading the ductwork outside, connecting it to the hood is easy. The ductwork connects to your hood with transition pieces.

Attach wall or roof caps to exterior walls or roofs.

The final step is to get out of your house and install a wall or roof cap over the ends of your pipes. The cover helps keep debris and dirt out of the pipes. This will allow it to operate efficiently for years to come.

Hope you found this guide on how to ventilate through walls helpful. If you have any questions or you want to buy a range hood, please contact us.

Greaidea is a professional custom cooker hood manufacturer with over 20 years of experience. In our R&D department, 16 engineers are employed to guarantee our R&D advantage and continuous improvement. Spend 3% of revenue on research and development each year. With an excellent manufacturing team and quality control team, we can achieve an annual output of 800,000 gas stoves and 300,000 range hood products of the best quality.
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