Can You Use Flexible Duct For Range Hood? 2023 Guide

In case you plan to install a range hood in your kitchen, you should think about whether or not can you use flexible duct for range hood or what kind of ducting you’ll use to vent the exhaust air outside. You may want to consider flexible ducting, which is made up of a flexible, corrugated material.

There are a number of factors to consider before choosing flexible ducting for your range hood installation before choosing flexible ducting. Using flexible ducting for a range hood installation has both benefits and drawbacks, and we will examine both in this article.

What Is Flexible Ducting?

Flexible ducting is a type of duct that can be bent and molded into small spaces, as its name implies. Materials such as polyester and aluminum are often used to build them, and they are available in a variety of diameters and lengths.

Can You Use Flexible Duct For Range Hood?

Yes, flexible ducts can be used for range hoods, but be sure to follow local building codes. Venting range hoods with flexible ductwork are common because of their flexibility, ease of installation, and ability to fit into tight spaces. To make sure efficient ventilation, it should be made of the right material, usually aluminum. Ensure that flexible duct is allowed in your area and follow the manufacturer’s installation instructions. To make sure your range hood vents are safe and effective, it needs to be installed and maintained correctly.  Now you know whether or not “can you use flexible duct for range hood.”

Read More: Best Recirculating Range Hood- Ultimate Reviews

Codes For Range Hood Duct

The vent must be vented outside. It is always necessary to vent the range hood outside. Crawl spaces, attics, and spaces below the ceiling cannot be used to exhaust.

Ducting Material

Range hood ducts can be made of copper, stainless steel, or galvanized steel. Cooking pollutants and moisture can be vented through them because they’re durable and corrosion-resistant.

Duct Length

  • The length of the range hood duct is determined by a number of factors, including the diameter of the duct, the smoothness of the walls that make up its interior, and the CFM (Cubic Feet per Minute) rating of the fan mounted inside the range hood.
  • A duct’s diameter has a direct impact on the amount of air it can move. As a result, larger diameter ducts are able to handle higher CFM ratings and are ideal for range hoods with greater power outputs.
  • A smooth duct wall allows for more efficient and effective airflow as a result of faster airflow. If the interior surface of a duct is rough or irregular, the ventilation performance may be adversely affected.
  • There is a CFM rating on a range hood that represents the amount of airflow that it is capable of creating. The CFM rating must be matched with the size of the ducts to ensure that there is adequate ventilation.

Exterior Cover

  • When possible, range hood vents should be installed outside the building. There is no longer a need for cooking pollutants, heat, or moisture to be recirculated inside the kitchen as this method ensures that they are expelled outside.
  • The vent should be terminated at a distance of at least three feet from any windows, doors, or other vents in order to prevent the exhaust air from re-entering the building after leaving it.

Minimum Exhaust Rate Or CFM

There must be adequate ventilation in the kitchen range hood in order to effectively remove cooking odors, smoke, and moisture. A range hood should have a minimum airflow rate of 100 CFM to ensure maximum efficiency. Consequently, the hood is able to efficiently capture and exhaust pollutants, creating a cleaner and more comfortable kitchen environment as a result of capturing and exhausting pollutants efficiently.

Must Use Individual Or Dedicated Branch Circuit

  • Range hoods need dedicated electrical circuits to make sure they’re safe and reliable. As a result, there will be no overloading of other circuits in the kitchen, as well as less risk of electrical issues occurring.
  • For safety reasons, it is often a requirement in electrical codes that a dedicated branch circuit is provided for the range hood in order to comply with safety requirements.

When it comes to installing and venting a range hood, these guidelines are essential. Choosing the right duct material, determining the right duct length, installing vents outdoors, and ensuring adequate CFM ratings and dedicated electrical circuits are key to effective and safe kitchen ventilation. Consult your local building codes and manufacturer’s recommendations for specific requirements and guidelines.

Benefits Of Using Flexible Ducting For A Range Hood


Due to its flexibility, flexible ducting can be easily installed in confined areas or around objects like pipes and cables. Moreover, it can be tailored to the length you require, allowing you to meet your specific needs.

Easy to Install

One of the main advantages of a flexible range hood duct is its ease of installation. By simply bending, twisting, and modifying the flexible material, it can be adapted to fit the space available. Hence, it is an excellent alternative for confined spaces or places where rigid ducts would be difficult to install.


Generally, flexible range hood ducts are less expensive than rigid ones. Due to their simplicity and fewer material requirements, they are more affordable for consumers.

Energy Efficient

The smooth interior surfaces of flexible range hood ducts reduce air resistance, keeping the range hood’s efficiency high. Consequently, the range hood will be better able to eliminate smoke, steam, and odors from cooking in the kitchen, which will improve indoor air quality and reduce fire hazards.

Easy to Clean

In addition to being easy to remove and clean with soap and water, flexible range hood ducts are also easy to maintain. As a result, grease and other contaminants cannot accumulate, reducing the efficiency of the range hood.

Quiet Operation

Flexible range hood ducts are typically quieter than rigid ducts because they are more adaptable and flexible. Consequently, the range hood makes less noise because airflow is smoother through the duct. Flexible range hood ducts are an excellent choice for homeowners seeking an affordable ventilation system.

Read More: How to Remove Microwave and Install Range Hood?

Drawbacks Of Using Flexible Ducting For A Range Hood

Reduced airflow

Due to their ribbed interior, ducts might reduce your range hood’s effectiveness. As a result, your kitchen may suffer from inadequate ventilation, which can lead to the buildup of oil and cooking odors.

Increased noise

Flex ducts can produce more noise than rigid ducts due to the vibration of the ribbed surface. Your house may be disturbed by this noise, and you may feel annoyed.

Susceptibility to damage

It is more likely for flexible ducts to sustain damage. The kinking or crushing of flexible ducts can limit airflow and cause inadequate ventilation. Additionally, they are more prone to rips and punctures, which can cause air leaks and decrease the effectiveness of your range hood.

Fire hazard

There are more fires that start in flexible ducts. The flames may spread quickly if they come into contact with a heated surface. There are so many potential ignition sources in a kitchen that this is particularly dangerous.

Short lifespan

It takes a shorter time for flexible ducts to wear out. As a result of exposure to heat, moisture, and grease, they may degrade over time, reducing airflow and causing leaks. Given the above pros and cons, is it wise to use a flexible duct for a range hood? Your kitchen layout, where your range hood is located, and your overall preferences and budget play a role in the decision.

In the end, the best option will depend on your unique needs and circumstances. The type of ductwork appropriate for your range hood can be determined by a qualified HVAC or ventilation contractor.

What Things To Consider Before Buying:

There are a few things to consider before buying a range hood for your kitchen so you get the right one. Keep these things in mind:

Cooking Style and Kitchen Size:

Assess your cooking habits and what you cook. Whenever you cook foods that produce smoke, steam, or strong odors, you’ll need a range hood with higher ventilation capacity (measured in cubic feet per minute). Make sure your kitchen is the right size. To effectively capture and remove pollutants in larger kitchens, a more powerful range hood may be needed.

Ventilation Type:

Choose between ductless (recirculating) and ducted range hoods. A ductless hood filters and recirculates the air after it’s been purified, while a ducted hood vents byproducts and odors outside the home. Typically, ducted hoods are more efficient at removing pollutants, but they need external vents.

CFM Rating:

The CFM rating is one of the most important specifications to consider. A range hood’s airflow capacity is indicated by this number. The CFM rating of the hood should correspond to the size of your kitchen and the intensity of the cooking you do in your kitchen. There should be a range hood in the kitchen that has a minimum capacity of 100 CFM for a typical home kitchen.

Range Hood Size and Design:

Make sure that the range hood’s size matches the dimensions of your stove or cooktop before buying it. For the capture to be effective, it should cover the entire cooking area. There are a variety of different kinds of hoods available, such as under-cabinet, wall-mounted, island, or downdraft hoods. The style of your kitchen should complement the aesthetics of the room.

Noise Levels:

Range hoods are usually measured in decibels (dB). In open-concept kitchens where noise can be disruptive, it is preferable to have quieter hoods, especially in areas with high ceilings. In some models, the fan speed can be adjusted to meet your preferences, allowing you to adjust the noise level in accordance with your needs.

Additional Features and Controls:

Check out the control options and features. You want easy-to-use controls so you can adjust the fan speed and lighting. Additional convenience features include auto-shutoff timers, heat sensors that adjust fan speed based on cooking activity, and remote controls.

You want a range hood that doesn’t just remove pollutants and maintain kitchen air quality but also fits the layout and design of your kitchen. It’ll make cooking more enjoyable and comfortable while enhancing your kitchen’s functionality and aesthetics.

Read More: Can I Use Semi-Rigid Duct For My Range Hood?


To answer the question, “can you use flexible duct for range hood exhausts,” it is generally not recommended. Due to their ribbed surface, flexible ducts can collect grease and dirt, resulting in clogs and decreased airflow. As well as sagging, they may collect condensation, which can encourage mold growth.

Metal or other suitable materials should be used for ducts that are rigid, smooth, and easy to clean. Rigid ducts also provide better airflow, which is important to ventilate cooking fumes and odors efficiently. To ensure safe and effective operation, follow the manufacturer’s instructions and local building codes when installing range hood ductwork.