What is a Butterfly Backdraft Damper and how does it work?

A Butterfly Backdraft Damper is a device designed to prevent the reverse flow of air in ventilation systems. It operates using a pivoting blade that opens to allow airflow in the designated direction and closes to block backdrafts. By using this damper, you can maintain efficiency in your HVAC system, ensuring conditioned air doesn’t escape and unwanted air doesn’t enter. It’s especially useful in situations where external air pressure can force unconditioned air back into the system, such as in high-rise buildings or during high winds.

What applications are suitable for the Butterfly Backdraft Damper?

The Butterfly Backdraft Damper is commonly used in residential and commercial HVAC systems, exhaust ducting, and kitchen hoods. Its design makes it ideal for applications where airflow regulation is crucial for maintaining indoor air quality and efficiency. For instance, when installed in a kitchen exhaust system, it prevents outside odors from coming in through the ducts when the system is not in operation, helping to keep your living environment fresh.

What size should I choose for my ventilation system?

Choosing the right size for your Butterfly Backdraft Damper is critical for optimal performance. The BD 7 model has a 7-inch diameter, making it suitable for duct systems with matching specifications. It is essential to measure your existing ductwork and ensure compatibility. Installing a damper that is too small may restrict airflow, while one that is too large may not seal properly, allowing unwanted airflow.

How do I install the Butterfly Backdraft Damper?

Installing the Butterfly Backdraft Damper is straightforward, but it is crucial to follow the manufacturer’s guidelines. Generally, you will need to cut the duct to fit the damper, ensuring a snug and secure installation. Use duct tape or clamps to seal any gaps around the edges to maintain airflow integrity. Proper installation ensures that the damper functions correctly, keeping unwanted air out while allowing essential ventilation.

What materials is the Butterfly Backdraft Damper made from?

The Butterfly Backdraft Damper is typically constructed from durable materials such as galvanized steel or aluminum. These materials are chosen for their strength and resistance to corrosion, ensuring longevity and reliable performance in various environments. The choice of material also plays a role in maintaining air tightness, which is essential for energy efficiency and performance in heating and cooling systems.

Can I use this damper in a high-velocity system?

Yes, the Butterfly Backdraft Damper can be used in high-velocity HVAC systems, provided that the system's pressure specifications match the damper's design. It's advisable to consult with an HVAC professional to ensure compatibility. In high-velocity systems, proper installation is vital to prevent noise and ensure efficient airflow. This damper aids in regulating airflow and pressure, making your ventilation system more efficient.

Is the Butterfly Backdraft Damper suitable for air conditioning systems?

Absolutely, the Butterfly Backdraft Damper is suitable for air conditioning systems as well. It helps to maintain proper airflow and prevents backflow of warmer air into cooled areas, optimizing system efficiency. Installing it in your AC ducts can significantly enhance the performance of your system while extending its lifespan by reducing strain on components caused by inefficiencies.

How can I determine if my damper is functioning correctly?

To determine if your Butterfly Backdraft Damper is functioning correctly, observe the airflow when the system is in operation. The damper should open when air is flowing through and completely seal when airflow stops. Regular maintenance checks can help identify any issues, such as stuck blades or debris accumulation, which may hinder performance. Ensuring proper operation is key to maintaining your HVAC system's efficiency.

Where can I buy the Butterfly Backdraft Damper (7 Inch) (BD 7) in India?

You can buy the Butterfly Backdraft Damper (7 Inch) (BD 7) from Ubuy in India. Ubuy offers a range of ventilation solutions, including this specific damper, ensuring you have access to high-quality products tailored to your needs. Their platform provides user-friendly shopping options, making it simple to find and purchase the right equipment for your ventilation requirements.

Is maintenance required for the Butterfly Backdraft Damper?

While the Butterfly Backdraft Damper is designed to be low-maintenance, routine checks are recommended to ensure optimal performance. It’s essential to inspect the damper periodically for any signs of wear, dirt buildup, or blockages that could affect operation. Regular maintenance not only prolongs the life of the damper but also enhances the efficiency of your entire HVAC system by ensuring that it operates under optimal conditions.

How to Shop Butterfly Backdraft Damper (7 Inch) (BD 7) Online From Ubuy?

It’s easy to shop Butterfly Backdraft Damper (7 Inch) (BD 7) online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.

Is Butterfly Backdraft Damper (7 Inch) (BD 7) Available to Shop Online in India?

Yes, at Ubuy India this product is available for you to shop at a reasonable price. The Butterfly Backdraft Damper (7 Inch) (BD 7) is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

HVAC Express

Butterfly Backdraft Damper (7 Inch) (BD 7)

Proven design to protect against backdraft in your appliance venting.

HVAC Express

Item #: 15107871

Butterfly Backdraft Damper (7 Inch) (BD 7)

88% of respondents would recommend this to a friend

Item #: 15107871

INR 5793

Price Details

Price

INR 5793

M.R.P. INR 5793

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

^{*All items will import from US}

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Proven design to protect against backdraft in your appliance venting.

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What Stands Out

Efficient Airflow

The butterfly backdraft damper enhances airflow efficiency by preventing backdrafts, ensuring that only desired air circulates within HVAC systems for optimal performance.

Durable Construction

Crafted from high-quality materials, the 7-inch damper guarantees long-lasting durability and reliability under various environmental conditions, reducing the need for frequent replacements.

Easy Installation

Designed for straightforward installation, the BD 7 damper can be quickly mounted in existing ducts, minimizing downtime and allowing for hassle-free upgrades to airflow systems.

Product Details

Brand Name	HVAC Express
Number of Items	1
Unit Count	1 Count
Manufacturer	HVAC Express
Manufacturer Part Number	BD 7
Seat Width	7 inches
Item Weight	16 ounces (453.6 grams)
Color	Silver
Material Type	Galvanized Metal
Brand	HVAC Express
Material	Galvanized Metal
Country of Origin	This item will be imported from US
What is in the box	Butterfly Backdraft Damper (7... For more details, please check description/product details

Who Should Buy?

HVAC Installations
Ideal for HVAC professionals seeking to prevent backflow in ventilation systems, enhancing system efficiency and indoor air quality.
Residential Use
Perfect for homeowners wanting to improve their ductwork's performance by minimizing unwanted drafts and air leakage.
Energy Savers
Great for environmentally conscious users aiming to reduce energy bills by optimizing airflow and preventing heat loss.

Large Commercial Use
Unsuitable for large-scale commercial applications where higher capacity dampers may be necessary for proper airflow management.

Product Description

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Customer Questions & Answers

Question: How to Shop Butterfly Backdraft Damper (7 Inch) (BD 7) Online From Ubuy?

Answer: It’s easy to shop Butterfly Backdraft Damper (7 Inch) (BD 7) online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is Butterfly Backdraft Damper (7 Inch) (BD 7) Available to Shop Online in India?

Answer: Yes, at Ubuy India this product is available for you to shop at a reasonable price. The Butterfly Backdraft Damper (7 Inch) (BD 7) is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

HVAC Express Ducting Editorial Review

Butterfly Backdraft Damper (7 Inch) (BD 7) is a high-quality backdraft damper valve made from galvanized metal, ensuring solid construction and durability. Users have praised its smooth and silent operation, making it ideal for kitchen exhaust fans. The thoughtful design allows for easy installation and effective use of gravity to keep the damper doors functioning correctly. Reviewers highlighted its robust structure compared to cheaper alternatives found in typical home improvement stores, indicating that it does an excellent job of preventing backdraft and reducing noise. With an emphasis on quality and performance, this damper is seen as a reliable choice for any ventilation system.

Customer Reviews & Ratings

4.9

33 customers ratings

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Pros

High-quality construction for long-lasting performance
Operates smoothly and silently when installed
Easy to install and user-friendly design
Effective at preventing backdraft and noise
Robust structure compared to competitors

Cons

Requires careful installation orientation for optimal function

Platform Trust & Buyer Confidence

4.3/5 1588 reviews

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Anjan

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“It is really an amazing experince on importing items from US. Very simlified procedure of custom duty handling. The delivery was also done in lightning seed.”

20 September 2026 · via Trustpilot

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“Product was of good quality.”

23 September 2026 · via Trustpilot

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“Very easy to use Very easy to use. Nice resolution. Ubuy got it in the assured time slot.”

06 October 2026 · via Trustpilot

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“I have ordered McLaren formula car for kids from Huffy. Ubuy actually done a great job by quality testing the car before shipping long distance over to India from USA. Ubuy has taken very good care over shipment as well. I am great fan of Ubuy and I wish them the success they deserve.”

07 October 2026 · via Trustpilot

Robbin

Verified buyer

“Highly recommended for hard-to-find items Extremely satisfied with my purchase on Ubuy. I was initially unsure about ordering from an international seller, but everything went without a hitch. All customs and shipping details were handled seamlessly with zero surprise fees at delivery. The product is 100% genuine and well-packaged. Highly recommended for rare or imported products!”

07 October 2026 · via Trustpilot

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Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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INR 5793

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QTY:

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Features & Benefits

Eliminates noise with lightweight blades and foam closure.
Easy installation with heavy-duty 26 gauge galvanized metal.
Flexible mounting options: vertical or horizontal with one end crimped.
Available in sizes ranging from 3 to 24 inches for versatile ducting.
Made in the USA with a proven design for maximum efficiency.
Enhances your appliance venting system with quiet closure.

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Butterfly Backdraft Damper (7 Inch) (BD 7)