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Item #:
5539175
Tjernlund BD-8 Spring-Return Backdraft Damper for 8 in Round Duct Systems
82% of respondents would recommend this to a friend
Item #:
5539175
BSD 128
Price Details
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In stock
Imported from USA store
QTY:
Only 3 items left in stock.
Order now and get it around Thursday, November 19
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What Stands Out
Automatic Operation
The BD-4 features a spring return mechanism that automatically seals the duct when not in use, preventing backdrafts and optimizing airflow efficiency in residential and commercial spaces.
Compact Design
Designed for 4-inch ducts, the BD-4's slim profile allows for easy installation in tight spaces, making it a versatile solution for various HVAC applications without compromising performance.
Durable Construction
Crafted from high-quality materials, the BD-4 ensures long-lasting durability and reliable operation, providing excellent value and peace of mind over time compared to competitors in the market.
Product Details
| Brand Name | Tjernlund |
| Model Number | BD-8 |
| Manufacturer Part Number | BD-8 |
| Global Trade Identification Number | 00080956439000 |
| Number of Items | 1 |
| UPC | 080956439000 |
| Item Highlight | Spring-return damper fits 8 in round duct to reduce reverse airflow; verify orientation, clearance and installation needs. |
| Unit Count | 1 Count |
| Included Components | Damper |
| Manufacturer | Tjernlund |
| Auto Part Position | Rear |
| Compatible with Vehicle Type | Truck |
| Style Name | Modern |
| Material Type | Aluminum |
| Brand | Tjernlund |
| Style | Modern |
| Vehicle Service Type | Truck |
| Material | Aluminum |
| Item Weight | 3 lbs (1.36 kg) |
What's in the box
Damper
Who Should Buy?
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Homeowners
Ideal for homeowners needing to prevent backdrafts and ensure proper ventilation in their HVAC systems.
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HVAC Technicians
Excellent for HVAC professionals installing systems to enhance airflow efficiency and meet code requirements.
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Energy Savers
Suitable for those aiming to reduce energy loss by preventing unwanted airflow when systems are not in use.
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Large Duct Systems
Not suitable for larger duct systems as it is specifically designed for 4-inch diameter ducts only.
Product Description
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Customer Questions & Answers
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Question:
How to Shop Tjernlund BD-8 Spring-Return Backdraft Damper for 8 Online From Ubuy?
Answer: It’s easy to shop Tjernlund BD-8 Spring-Return Backdraft Damper for 8 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 Tjernlund BD-8 Spring-Return Backdraft Damper for 8 Available to Shop Online in The Bahamas?
Answer: Yes, at Ubuy The Bahamas this product is available for you to shop at a reasonable price. The Tjernlund BD-8 Spring-Return Backdraft Damper for 8 is not available locally but you can trust us with our express shipping services. -
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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.
Tjernlund Ducting BD-8 Editorial Review
Tjernlund BD-4 Spring-Return Backdraft Damper is designed specifically for 4 in round duct systems to effectively reduce reverse airflow. It features a robust build with a modern style, made from aluminum and rubber, ensuring durability and longevity in any application. Users have noted that the damper fits snugly on standard 4-inch sewer pipes, with a strong spring mechanism that maintains tight closure. However, potential buyers should consider the damper's suitability for their setup, as some reviews mention that the spring tension may be too strong for lower airflow applications, requiring adjustments for optimal functionality. Overall, many find it to be a great addition for dust collection systems and other ventilation needs.
Customer Reviews & Ratings
83 customers ratings
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5 Star
50%
-
4 Star
21%
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3 Star
9%
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2 Star
10%
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1 Star
10%
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Pros
- Strong build quality and solid construction
- Fits snugly on standard 4 in pipes
- Quiet operation without clacking sounds
- Designed to reduce reverse airflow effectively
- Suitable for various duct systems
Cons
- Spring tension may be too strong for lower airflow applications
Platform Trust & Buyer Confidence
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Mona
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“Everything was efficient and fast. ”
05 November 2026 · via Trustpilot
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Music
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05 November 2026 · via Trustpilot
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William
Verified buyer
“I can't fault this purchase. Had a scarce part i needed, cheaper than i could source it in the UK, ordered and was followed up with great communication and speedy delivery of a very well packaged part.”
06 November 2026 · via Trustpilot
A
Andrew
Verified buyer
“Fast delivery, good and secure packaging, everything was fine and with no problems.”
06 November, 2026 · via Trustpilot
SM
Stephen
Verified buyer
“I am very happy with my insoles purchase, they make my work boots very comfortable and soft to walk on and even mitigate the vibration from driving the truck all day. I would highly recommend this company for online purchases, reliability of product delivery and value for money.”
07 November 2026 · via Trustpilot
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BSD 128
Order now and get it around Thursday, November 19
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 3 items left in stock.
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