Can a Range Hood Be Vented Through a Wall? Yes, Here's How

Yes, a range hood can be vented through a wall. Most ducted range hoods support horizontal venting. You need a wall cap, proper duct size, and a clear path to the outside. Wall venting is common in kitchens without overhead attic access. It works well for both single-story and multi-story homes.

5 min read

Wall venting is a viable option for most range hoods.

Use rigid metal duct and a proper wall cap.
Keep duct runs short and straight for efficiency.
Check local codes and hood specifications before installing.

What Does Wall Venting a Range Hood Involve?

Wall venting routes the exhaust duct horizontally through an exterior wall. This is different from roof venting, which goes up and out. The duct connects from the hood to a wall cap outside. Wall caps prevent backdrafts and keep out pests. You must ensure the duct is as short and straight as possible. Longer ducts reduce airflow and efficiency.

Key Requirements for Wall Venting

First, check local building codes for venting rules. You need a duct size that matches the hood's outlet, usually 6 or 8 inches. Use rigid metal ducting for best performance. Flexible ducting is easier but can restrict airflow. The wall cap must have a backdraft damper. Insulate the duct in unheated spaces to prevent condensation. Also, keep the duct away from electrical wires and plumbing.

How to Choose the Right Range Hood for Wall Venting

Look for a hood with a horizontal exhaust option. Many ducted hoods have a round outlet that can point upward or backward. Check the hood's specifications for maximum duct run length. Some hoods come with backdraft dampers built-in. Consider the CFM rating; higher CFM handles longer ducts better. Measure the distance from the hood to the wall to plan the duct path.

Wall Venting vs. Roof Venting: Which Is Better?

Wall venting is often easier and cheaper to install. It avoids roof penetrations, which can leak. Roof venting is necessary if the kitchen is far from an exterior wall. Wall venting works well for single-story homes and top-floor kitchens. Roof venting may be required by some building codes. Compare the total duct length and number of elbows for each option.

Can You Vent a Range Hood Through an Interior Wall?

No, you cannot vent through an interior wall. The duct must lead to the outside. Interior walls lack a path to the exterior. Venting into an attic or crawlspace is unsafe and against code. Moisture and grease will accumulate, causing mold and fire hazards. Always terminate the duct at an exterior wall or roof.

Common questions

How long can a range hood duct be through a wall?

Most manufacturers recommend a maximum total duct length of 30 to 40 feet. Each elbow adds about 5 feet of equivalent length. Keep the duct as short as possible for best performance.

What size duct do I need for wall venting?

Use a duct size that matches the hood's outlet, typically 6 or 8 inches. Larger ducts reduce airflow resistance. Check the hood's manual for the required size.

Can I use flexible duct for wall venting?

Yes, but rigid metal duct is better. Flexible duct restricts airflow more and can sag. Use it only for short runs and avoid sharp bends.

Do I need a wall cap for wall venting?

Yes, a wall cap is essential. It protects the duct from weather and pests. It also includes a damper to prevent backdrafts when the hood is off.

Can a range hood vent through a wall in a basement?

Yes, if the basement has an exterior wall. Ensure the duct exits above grade or with proper clearance. Check local codes for basement venting requirements.

Is wall venting better than recirculating?

Wall venting is more effective at removing smoke and odors. Recirculating hoods use filters and return air to the kitchen. Wall venting is preferred for serious cooking.

Can I convert a recirculating hood to wall venting?

Sometimes. Many hoods are convertible, but you need a duct kit. Check the hood's model for compatibility. If not convertible, you must replace the hood.

What is the cost to vent a range hood through a wall?

Costs vary by duct length and wall type. Professional installation can be significant. DIY installation saves money but requires skills. Get quotes from local contractors.