If you have a powerful range hood, you know the frustration of negative pressure: doors slam, drafts sneak in, and your exhaust fan struggles to do its job. A makeup air damper solves this by letting fresh outside air in when the hood runs, keeping your home balanced and comfortable.
This guide reviews the best makeup air dampers across sizes and brands, from universal kits to motorized options with pressure sensors. Whether you need a compact 4-inch unit or a heavy-duty 10-inch model, you’ll find the right fit for your kitchen ventilation system.
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8 in. Universal Make-Up Air Damper Duct Kit for Range Hood
Best forSimple 8-inch retrofits
- Universal fit
- No wiring needed
ConsiderPassive operation
Duct 6 in. Universal Make-Up Air Damper Kit for Range Hood
Best forCompact 6-inch duct systems
- Easy installation
- No electrical work
ConsiderPassive operation
Broan MD6TU Range Hood Make-Up Air Damper Assembly for Broan Genuine Origin…
Best forBroan OEM replacement
- Genuine OEM part
- Perfect fit
ConsiderSpecific to Broan
Broan MD8TU 8" Universal Make-Up Air Damper
Best forVersatile 8-inch installations
- Universal fit
- Automatic operation
ConsiderMay need extra parts
Broan MD10TU Motorized Universal Make-Up Air Damper with Pressure Sensor Ki…
Best forHigh-CFM interlocked systems
- Motorized operation
- Pressure sensor included
ConsiderRequires wiring
6" Universal Automatic Make-Up Air Damper with Pressure Sensor Kit
Best forAutomatic 6-inch balancing
- Automatic sensor
- Universal compatibility
ConsiderNot motorized
Suncourt 8 in Make Up Air Kit, Motorized Damper for Range Hood Intake
Best forComplete code-compliant kits
- Motorized damper
- Current-sensing switch
ConsiderRequires electrical connection
Suncourt 10 in Make Up Air Kit, Motorized Damper for Range Hood Intake
Best forLarge high-CFM hoods
- Motorized operation
- Complete kit
ConsiderRequires wiring
Suncourt 4 in Make Up Air Kit, Motorized Damper for Range Hood Intake
Best forSmall spaces and baths
- Compact size
- Automatic operation
ConsiderLimited to 4-inch ducts
Suncourt 5 in Make Up Air Kit, Motorized Damper for Range Hood Intake
Best for5-inch duct systems
- Motorized damper
- Automatic switch
ConsiderRequires electrical hookup
Zephyr 8 in. Universal Make-Up Air Damper Duct Kit
The Zephyr 8-inch universal makeup air damper kit is a straightforward solution for range hoods that exhaust through 8-inch ductwork. It’s designed to be compatible with most systems, making it a versatile choice if you’re retrofitting an existing setup. The kit includes everything you need to install the damper directly into your duct line, ensuring a secure fit without custom parts.
Because it’s a passive damper, it relies on the pressure difference created by your range hood to open, which means no wiring or sensors are needed. That simplicity makes it a reliable, low-maintenance option for many homeowners. If you’re looking for a no-fuss way to balance your kitchen’s air pressure, this Zephyr kit delivers.
- Universal fit
- No wiring needed
- Complete kit
- Passive operation
- Limited to 8-inch ducts
Zephyr 6 in. Universal Make-Up Air Damper Kit
For kitchens with 6-inch exhaust ducting, the Zephyr universal makeup air damper kit offers the same straightforward design as its 8-inch sibling. It’s built to fit seamlessly into your existing ductwork, providing a passive solution that opens when your range hood creates negative pressure. This makes it an excellent choice for smaller hoods or bathrooms with exhaust fans.
The kit is easy to install and doesn’t require any electrical connections, which can save you time and money. It’s a practical, no-nonsense option if you want to meet building codes without adding complexity. If your setup uses 6-inch ducts, this Zephyr damper is a solid, dependable pick.
- Easy installation
- No electrical work
- Compact size
- Passive operation
- Not for large hoods
Broan MD6TU Range Hood Make-Up Air Damper Assembly
The Broan MD6TU is a genuine OEM replacement part, specifically designed to fit Broan range hoods that use a 6-inch makeup air damper. If you’re replacing a worn-out damper in an existing Broan system, this assembly ensures a perfect match and reliable performance. It’s built to the exact specifications of the original, so you can trust it to function correctly.
This damper is a direct replacement, meaning you won’t need to modify your ductwork or wiring. It’s a practical choice for homeowners who want to restore their ventilation system’s efficiency without replacing the entire hood. If you have a Broan range hood and need a dependable replacement damper, this is the part to get.
- Genuine OEM part
- Perfect fit
- Restores functionality
- Specific to Broan
- No universal compatibility
Broan MD8TU 8" Universal Make-Up Air Damper
The Broan MD8TU is an 8-inch universal makeup air damper from a trusted name in ventilation. It’s designed to work with a wide range of range hoods, making it a flexible option for many homes. The damper opens automatically when your exhaust fan runs, helping to balance indoor air pressure and prevent backdrafting.
As a universal model, it can be installed in various duct configurations, and its durable construction ensures long-lasting performance. Broan is known for quality, and this damper lives up to that reputation. If you need an 8-inch damper that’s reliable and easy to integrate, the MD8TU is a strong contender.
- Universal fit
- Automatic operation
- Trusted brand
- May need extra parts
- Not motorized
Broan MD10TU Motorized Universal Make-Up Air Damper
The Broan MD10TU is a motorized makeup air damper with a pressure sensor kit, designed for 10-inch duct systems. It interlocked with select Broan range hoods to provide makeup air automatically, ensuring your kitchen stays comfortable and your hood operates at peak efficiency. The motorized design opens the damper precisely when needed, avoiding the energy waste of passive barometric solutions.
This damper also supports slave dampers (MD6S, MD8S, or MD10S) that open in unison for synchronized operation, which is ideal for larger kitchens with multiple exhaust points. It’s a smart investment if you have a high-CFM hood that requires reliable makeup air. For a robust, interlocked system, the MD10TU delivers.
- Motorized operation
- Pressure sensor included
- Supports slave dampers
- Requires wiring
- Specific to Broan hoods
Broan-NuTone 6" Universal Automatic Make-Up Air Damper
The Broan-NuTone 6-inch universal automatic makeup air damper is a compact solution for smaller range hoods or bathroom exhaust fans. It features a pressure sensor that automatically opens the damper when your fan creates negative pressure, ensuring a balanced environment without manual intervention. This makes it a convenient, hands-off option.
As a universal model, it’s compatible with a variety of ventilation systems, and its automatic operation helps maintain indoor air quality. The damper is easy to install and built to last, reflecting Broan-NuTone’s commitment to quality. If you need a reliable 6-inch damper that works on its own, this is a great choice.
- Automatic sensor
- Universal compatibility
- Compact design
- Not motorized
- Limited to 6-inch ducts
Suncourt 8 in Make Up Air Kit with Motorized Damper
The Suncourt 8-inch makeup air kit is a complete, automatic solution for balancing your kitchen range hood. It includes a motorized damper, a UL-listed 24V transformer, and a current-sensing switch that opens the damper whenever your hood or exhaust fan is running. This ensures your home stays at neutral pressure, preventing the negative pressure that can cause backdrafting.
The kit is designed to meet International Residential Code M1503.4 requirements, making it a code-compliant choice for new builds or renovations. It’s easy to install and provides peace of mind by protecting your home’s appliances and comfort. If you want a turnkey makeup air system, this Suncourt kit is an excellent option.
- Motorized damper
- Current-sensing switch
- Meets building code
- Requires electrical connection
- Higher price point
Suncourt 10 in Make Up Air Kit with Motorized Damper
The Suncourt 10-inch makeup air kit is built for larger range hoods that exhaust significant air volume. It includes a motorized damper, a UL-listed 24V transformer, and a current-sensing switch that automatically opens the damper when your hood is active. This maintains neutral pressure in your home, preventing backdrafting and keeping your living space comfortable.
This kit also helps meet International Residential Code M1503.4 requirements, making it suitable for new construction or major renovations. The motorized design ensures precise control, and the included components make installation straightforward. If you have a high-CFM hood, this Suncourt kit provides the robust makeup air you need.
- Motorized operation
- Complete kit
- Code compliant
- Requires wiring
- Bulky for tight spaces
Suncourt 4 in Make Up Air Kit with Motorized Damper
The Suncourt 4-inch makeup air kit is a compact solution for smaller exhaust fans, such as those in bathrooms or modest range hoods. It includes a motorized damper, a UL-listed 24V transformer, and a current-sensing switch that opens the damper automatically when your fan runs. This helps balance air pressure and prevents backdrafting, even in tight spaces.
Despite its small size, this kit meets International Residential Code M1503.4 requirements, ensuring code compliance for your project. It’s easy to install and ideal for retrofitting existing systems with limited space. If you need a small but effective makeup air solution, this Suncourt kit fits the bill.
- Compact size
- Automatic operation
- Code compliant
- Limited to 4-inch ducts
- Lower airflow capacity
Suncourt 5 in Make Up Air Kit with Motorized Damper
The Suncourt 5-inch makeup air kit offers a middle-ground solution for exhaust fans that need a bit more airflow than a 4-inch damper but don’t require a large 6-inch unit. It includes a motorized damper, a UL-listed 24V transformer, and a current-sensing switch that automatically opens the damper when your range hood or exhaust fan is active. This keeps your home at neutral pressure and prevents backdrafting.
This kit is also designed to meet International Residential Code M1503.4 requirements, making it a reliable choice for code-conscious homeowners. The motorized design ensures efficient operation, and the included components simplify installation. If you have a 5-inch duct system, this Suncourt kit is a perfect fit.
- Motorized damper
- Automatic switch
- Code compliant
- Requires electrical hookup
- Niche size
Buyer’s Guide: What to Consider
Choosing the right makeup air damper involves several key factors. Here’s what to consider to ensure you pick a damper that works efficiently with your range hood and meets your home’s needs.
- Duct Size: Match the damper size to your existing ductwork. Common sizes are 4, 5, 6, 8, and 10 inches. Using the wrong size can reduce efficiency or require adapters.
- Automatic vs. Passive: Passive dampers rely on pressure differences to open, while automatic or motorized dampers use sensors or switches. Motorized options offer more precise control and are better for high-CFM hoods.
- Compatibility: Some dampers are universal, while others are OEM parts for specific brands like Broan. Check your range hood's manual to ensure compatibility, especially for interlocked systems.
- Building Codes: Many local codes require makeup air for range hoods over a certain CFM. Look for dampers that meet International Residential Code M1503.4 to ensure compliance.
- Installation Complexity: Passive dampers are easier to install since they need no wiring. Motorized kits include transformers and switches, which may require professional installation if you're not comfortable with electrical work.
Conclusion
Makeup air dampers are essential for any powerful range hood, preventing negative pressure and keeping your home comfortable and safe. From simple passive models to advanced motorized kits, there’s a solution for every duct size and budget.
For most homeowners, the Suncourt kits offer a complete, code-compliant package, while Broan and Zephyr provide reliable universal and OEM options. Assess your duct size and hood’s CFM to make the best choice.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
With a passion for exploring the great outdoors and staying up to date on the latest fashion trends, Erica uses her expertise to provide valuable insights into the products that matter most to her readers.
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