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Back draft damper for insertion into 4 inch ventilation ducts. The backflow damper opens and closes automatically. It has a strong spring and can be installed either horizontally or vertically. Designed for use in AC, dryer vent, exhaust, extractor or range hoods, heating systems, fans, vents and other residential, commercial and industrial HVAC applications. Best to use with VENT SYSTEMS hvac parts.
Item #:
69521757
Vent Systems - 12 Inch Backdraft Damper - One-Way Airflow - Inline Fan Vent Deflector
Item #:
69521757
TTD 317
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*All items will import from US
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Back draft damper for insertion into 4 inch ventilation ducts. The backflow damper opens and closes automatically. It has a strong spring and can be installed either horizontally or vertically. Designed for use in AC, dryer vent, exhaust, extractor or range hoods, heating systems, fans, vents and other residential, commercial and industrial HVAC applications. Best to use with VENT SYSTEMS hvac parts.
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What Stands Out
One-Way Airflow
The backdraft damper ensures efficient one-way airflow, preventing unwanted air infiltration and enhancing overall ventilation efficiency. Ideal for maintaining consistent indoor air quality without backflow disruptions.
Compact Design
Designed with a 4-inch compact profile, this damper easily fits into tight spaces, making it versatile for various applications. Its size does not compromise performance, ensuring optimal airflow control.
Durable Construction
Built from high-quality materials, this damper withstands wear and tear while maintaining functionality. Its robust design guarantees long-lasting performance, providing excellent value for homeowners and professionals alike.
Product Details
| Special Features | Automatic Flap |
| Recommended Uses For Product | Exhausting |
| Mounting Type | duct mount |
| Controller Type | Button Control |
| Number of Speeds | 1 |
| Indoor Outdoor Usage | Indoor |
| Control Method | Remote |
| Main Power Connector Type | Type A or Type B |
| Installation Type | inline |
| Material | Metal |
| Blade Material | Plastic |
| Color | silver |
| Electric Fan Design | Exhaust Fan |
| Style | Industrial |
| Finish Type | Metallic |
| Form Factor | Inline |
| Collection Name | Hvac Components |
| Size | 12 Inch (30.5 cm) |
| Brand Name | Vent Systems |
| Manufacturer | Vent Systems |
| Unit Count | 1 Count |
| Brand | Vent Systems |
| Electric fan design | Exhaust Fan |
| Special Feature | Automatic Flap |
| Country of Origin | This item will be imported from US |
| What is in the box | Vent Systems - 12... For more details, please check description/product details |
| Item Weight | 3 lbs (1.36 kg) |
| Date First Available | April 06, 2021 |
Who Should Buy?
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Home Ventilation
Ideal for homeowners looking to control airflow and prevent backdraft in ventilation systems, enhancing indoor air quality.
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HVAC Professionals
Useful for HVAC technicians who require effective dampers for installations, ensuring optimal performance of heating and cooling systems.
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Small Spaces
Perfect for cramped areas where space-saving solutions are necessary, providing effective airflow management without bulk.
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Large Duct Systems
Not suitable for large HVAC duct systems that require higher airflow capacities beyond the 4-inch specification.
Product Description
Vent Systems - 12 Inch Backdraft Damper - One-Way Airflow - Inline Fan Vent Deflector
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is a backdraft damper and how does it work?
Answer: A backdraft damper is a device installed in ventilation systems, designed to prevent unwanted reverse airflow. It utilizes gravity to automatically close once the fan stops, effectively sealing the vent. This is crucial in maintaining indoor air quality by stopping cold drafts from entering or conditioned air from escaping. For instance, if you have an inline fan for exhaust, a backdraft damper ensures that when the fan is off, external air doesn’t flow back into the system, keeping your space comfortable. -
Question:
What are the benefits of a one-way airflow damper?
Answer: A one-way airflow damper facilitates the direction of airflow only in a single direction, preventing backflow. This design optimizes the efficiency of your ventilation system. For example, when installed with an exhaust fan, it ensures that stale air is expelled efficiently while also blocking outdoor air and pollutants from re-entering. This enhances air quality, conserves energy, and ensures a consistent indoor climate. -
Question:
Can this damper be used for both intake and exhaust applications?
Answer: The Vent Systems 12 Inch Backdraft Damper is primarily designed for exhaust applications to effectively manage airflow in and out of your space. While it can technically be employed in intake settings, its efficiency is maximized in removal scenarios. For instance, if you're venting out kitchen odors or bathroom humidity, it serves best in keeping air moving in one direction, improving air quality and maintaining optimal humidity levels. -
Question:
What materials are used in the construction of the damper?
Answer: This damper is typically constructed from durable materials such as aluminum or galvanized steel, ensuring longevity and resistance to corrosion. The robust build allows it to withstand various environmental conditions without compromising functionality. For many users, this means less frequent replacements and more reliable performance, especially in areas with fluctuating temperatures or high humidity. -
Question:
Is the Vent Systems damper adjustable?
Answer: The damper may not have adjustable features due to its designed purpose of providing a fixed one-way airflow. However, its installation method allows for easy integration into existing systems. Users generally appreciate a fixed damper for its simplicity, as it reduces the complexity of airflow management, ensuring consistent performance without the need for manual adjustments. -
Question:
How is the damper installed?
Answer: Installation of the Vent Systems backdraft damper is typically straightforward, involving mounting directly to ductwork or fan outlets. You may need tools like screws and a screwdriver for secure attachment. This setup allows homeowners and contractors alike to enhance their existing ventilation systems effectively. For instance, in a home ventilation project, placing this damper in-line with a fan can immediately improve airflow without professional intervention. -
Question:
What size ductwork is compatible with this damper?
Answer: This specific damper is designed for 12-inch ductwork, ensuring a tight seal and optimal performance. Matching the duct size with the damper is crucial for maintaining airflow efficiency, as an improper fit could lead to leaks and reduced effectiveness. If your ventilation system features 12-inch ducts, this damper is an ideal choice for ensuring consistent performance across your ventilation system. -
Question:
Can this backdraft damper help with energy efficiency?
Answer: Yes, a backdraft damper significantly contributes to energy efficiency by preventing unwanted airflow when the fan is not operational. This mechanism minimizes energy loss that occurs when conditioned air escapes and outside air seeps in. As a result, homeowners can enjoy reduced heating and cooling costs while maintaining a comfortable indoor environment. For example, during winter months, it helps keep warm air indoors, leading to more efficient energy use. -
Question:
What applications are ideal for using the Vent Systems 12 Inch Backdraft Damper?
Answer: Ideal applications for this damper include residential exhaust systems such as bathroom fans, kitchen hoods, and dryer vents. It can also be utilized in commercial settings where air exchange is necessary, like in restaurants or industrial kitchens. By ensuring that air is expelled effectively while preventing backflow, it creates a healthier and controlled environment, which is essential in maintaining air quality in such spaces. -
Question:
Where can I buy Vent Systems - 12 Inch Backdraft Damper - One-Way Airflow - Inline Fan Vent Deflector?
Answer: You can purchase the Vent Systems - 12 Inch Backdraft Damper from Ubuy in Trinidad and Tobago. Ubuy offers a wide selection of ventilation products and ensures a smooth shopping experience, making it a reliable choice for your home improvement needs.
Vent Systems Ducting Editorial Review
The Vent Systems 4" Inch Backdraft Damper is a heavy-duty one-way airflow ducting insert that helps prevent cold air from blowing back into your home during windy weather. It has inline spring loaded shutters to prevent backflow. However, the direction arrow needs to be paid attention to as it is directional. Some customers have noted that the foam seal insert that comes with the damper are lacking and may get hot or come loose, but this can be remedied by using foam and silicone. Despite packaging issues, some customers were able to make it work for their ventilation needs.
Customer Reviews & Ratings
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Pros
- Heavy-duty inline springs loaded
- Prevents cold air from blowing back into the home
- Can be used for ventilation needs
Cons
- The foam seal that comes with the damper is lacking
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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kund
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“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
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“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
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“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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Features & Benefits
- Automatically opens and closes
- Strong spring, can be installed horizontally or vertically
- Suitable for various HVAC applications
- Prevents cold air, wind, or smell from entering the ventilation pipe
- Made of galvanized steel, aluminum, and stainless steel for durability
- Best used with VENT SYSTEMS hvac parts
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