Answering the question: which automatic make-up air damper best fits your kitchen exhaust needs? This guide highlights top options designed to balance indoor air when range hoods operate, helping you choose based on duct size, compatibility, and installation style. Ideal buyers include homeowners upgrading homes with high-CFM hoods, remodelers adding code-compliant make-up air systems, and contractors seeking reliable interlocked dampers for synchronized operation. Below is a quick reference table of five strong picks.
| Product | Best For | Size / Compat | Notes |
|---|---|---|---|
| Broan MD10TU | High-CFM, universal make-up air | 10″ | Interlocked dampers; direct wire; suitable with select BROAN hoods |
| Broan-NuTone MD8T | Direct-wired, synchronized operation | 8″ | Interlocked with main damper; meets air balance needs |
| Zephyr 6″ Universal Kit | Smaller-diameter installations | 6″ | Universal kit for Zephyr line; straightforward install |
| Zephyr MUA010A 10″ | Zephyr hoods up to 1200 CFM | 10″ | Certified refurbished option; galvanized steel |
| CCB Innovations RMAS08 | Easy install, versatile residential use | 8″ | Universal installation; no false trips under non-use |
Broan MD10TU Motorized Universal Make-Up Air Damper
- Interlocked make-up air damper provides make-up air when called for, enabling range hood operation at optimum levels.
- Direct wire design works with select BROAN range hoods to balance indoor air pressure by providing interlocked make-up air.
- Damper opens automatically when the hood is activated, and slave dampers (MD6S, MD8S, or MD10S) interlock for synchronized operation.
Best for: Homes with Broan hoods requiring integrated interlocked control and precise air balance. Choose this if your installation uses a BROAN system and you want automatic opening synchronized with the hood.
Caution: Requires proper wiring to ensure interlock function; verify compatibility with existing hoods and control wiring.
Broan-Nutone MD8T 8″ Automatic Make-Up Air Damper
- Interlocked dampers provide make-up air when called for, keeping the home comfortable as the range hood operates at optimal levels.
- Direct-wired design works with select Nutone hoods to balance indoor air pressure via interlocked make-up air; damper opens automatically when the hood runs.
- Interlocked systems meet IRC Code requirements for make-up air with hoods over 400 CFM; helps reduce wasted energy from improper exhaust balance.
Best for: Homes using Nutone hoods and needing a code-compliant, automatic make-up air solution with reliable interlock control.
Limitation: May require professional wiring to ensure proper interlock integration and code compliance.
Zephyr 6 in. Universal Make-Up Air Damper Kit
- Universal make-up air damper kit designed for range hood installations requiring a 6-inch damper.
- Kit form simplifies installation and helps balance exhaust air with indoor pressure.
- Best for smaller duct runs or Zephyr hood configurations that call for a 6″ damper.
Best for: Projects with 6″ ducting where a universal solution is preferred for compatibility and ease of installation.
Caution: Limited to 6″ ducts; verify duct size before purchasing.
Zephyr MUA010A 10″ Round Make-Up Air Kit
- 10″ round make-up air kit designed for Zephyr range hoods up to 1200 CFM.
- Material: Galvanized steel; power: 24 volts; suitable for higher-CFM installations requiring robust dampers.
- Fact: This is listed as a certified refurbished product with a 90-day limited hardware warranty, emphasizing value in a factory-refurbished option.
Best for: Zephyr hood users who need a high-CFM, durable 10″ damper kit with lower cost through refurbished options.
Limitation: Refurbished units may have limited wear disclosure and shorter warranty window; confirm warranty expectations before purchase.
CCB Innovations RMAS08 Make-Up Air Damper System
- Make-up Air Damper System featuring universal installation that can be used with any residential kitchen vent hood.
- Includes an airflow switch designed to avoid false trips when the kitchen exhaust is not in use.
- Easy installation aimed at saving time and money on retrofits and new builds alike.
Best for: Homeowners seeking a flexible, universal make-up air solution that can work with a wide range of hood brands and models.
Limitation: Installation ease may depend on existing duct layout; confirm compatibility with your hood and ductwork.
Buying Guide: Make-Up Air Dampers
What size do I need? Start with your hood’s CFM rating and duct diameter. Larger hoods typically demand 8″–10″ dampers to balance air effectively; smaller kitchens can often use 6″ dampers without compromising performance.
Interlock vs. universal: Interlocked dampers synchronize with the hood’s operation, ensuring air balance and energy efficiency. Universal dampers are versatile across brands but may require more setup to achieve ideal interlock behavior.
Wiring and installation: Direct-wired dampers require electrical work. Confirm compatibility with your hood model and local codes. Some dampers meet IRC code requirements for hoods over 400 CFM.
Brand considerations: If you already have a specific hood brand, choosing a damper from the same line (Broan, Nutone, Zephyr, or others) can simplify compatibility and control integration.
While refurbished options may offer savings, verify warranty terms and ensure the unit includes original components and accessories.
Where to install: In-line dampers are commonly placed near the hood or along the supply duct to regulate air intake and reduce backdrafts. Ensure adequate clearance and access for servicing.
Frequently Asked Questions
- What is a make-up air damper?
A make-up air damper automatically introduces fresh air to balance exhaust from a range hood, improving indoor air quality and comfort.
- Do I need a make-up air damper for every hood?
Not always, but many codes require make-up air for hoods over certain CFMs. Check local building codes and hood specifications.
- What size should I buy?
Choose based on the hood’s CFM and duct size. 6″ dampers work for smaller setups, while 8″–10″ dampers suit larger, higher-CFM installations.
- Are interlocked dampers worth it?
Yes for most installations, because they ensure coordinated opening and closed cycles with the hood, preserving pressure balance and efficiency.
- Can I install a damper myself?
DIY is possible for many kits, but electrical wiring and code considerations may require a licensed professional.
- What brands offer universal dampers?
Brands like Zephyr and CCB Innovations provide universal dampers, while others offer brand-specific interlocked kits for easier integration.