Tjernlund BD-4 Spring-Return Backdraft Damper for 4 in Round Duct Systems
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Tjernlund BD-4 Spring-Return Backdraft Damper for 4 in Round Duct Systems
Galvanized steel, spring loaded dampers prevent back drafts with a tight seal and easy installation.
Tjernlund BD-4 Spring-Return Backdraft Damper for 4 in Round Duct Systems
товар №: 5539175

Tjernlund BD-4 Spring-Return Backdraft Damper for 4 in Round Duct Systems

товар №: 5539175

TJS 1394

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США Импортировано из магазина USA

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Galvanized steel, spring loaded dampers prevent back drafts with a tight seal and easy installation.
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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.

Информация о продукте

Shop for Tjernlund BD-4 Spring Return Backdraft Damper at Ubuy Tajikistan. Galvanized steel collar, aluminum damper blades. Get positive closure and interior gasket. Global delivery.
Brand NameTjernlund
Model NumberBD-4
Manufacturer Part NumberBD-4
Number of Packs1
Global Trade Identification Number00080956437006
Number of Items1
UPC080956437006
Item HighlightSpring-return damper fits 4 in round duct to reduce reverse airflow; verify orientation, clearance and installation needs.
Unit Count1 Count
Included ComponentsDamper
ManufacturerTjernlund
Auto Part PositionRear
Compatible with Vehicle TypeTruck
Automotive Fit TypeUniversal Fit
Style NameModern
Exterior FinishZinc
Material TypeAluminum, Rubber
BrandTjernlund
StyleModern
Vehicle Service TypeTruck
Item Weight1.1 lbs (500 grams)

Who Should Buy?

Suitable For
  • Homeowners

    Ideal for homeowners needing to prevent backdrafts and ensure proper ventilation in their HVAC systems.

  • HVAC Technicians

    Excellent for HVAC professionals installing systems to enhance airflow efficiency and meet code requirements.

  • Energy Savers

    Suitable for those aiming to reduce energy loss by preventing unwanted airflow when systems are not in use.

Not Suitable For
  • Large Duct Systems

    Not suitable for larger duct systems as it is specifically designed for 4-inch diameter ducts only.

ОПИСАНИЕ ТОВАРА

Tjernlund BD-4 Spring-Return Backdraft Damper for 4 in Round Duct Systems

Есть вопрос? Пообщайтесь с нами в чате

Вопросы и ответы клиентов

  • вопрос: What sizes are available for the backdraft damper?

    отвечать: The backdraft damper comes in sizes ranging from 4in to 16in.
  • вопрос: What material is used for the damper blades?

    отвечать: The damper blades are made of lightweight aluminum.
  • вопрос: Is installation difficult?

    отвечать: No, the backdraft damper is designed for easy installation.

Tjernlund Ducting BD-4 Editorial Review

The Tjernlund BD-4 Spring Return Backdraft Damper has garnered a mix of enthusiastic and critical feedback from customers, primarily revolving around its Construction quality and functionality versus expected air flow capabilities. Users commend the build quality, highlighting its solid Construction with a durable double-flanged rubber gasket, which enhances its effectiveness when correctly placed in systems with sufficient air flow. Many customers have noted that the damper fits securely onto standard 4-inch ducting, a feature that contributes to its appeal for various applications, including dust collection systems. However, the overarching concern among users pertains to the strength of the springs. Multiple reviewers have reported that the springs are excessively robust, making the damper challenging to activate in specific installations, particularly where air flow is weak. Customers installing it in horizontal positions, or with low-capacity fans, found the spring's resistance problematic, requiring modifications such as removing springs, which could compromise effectiveness. This, coupled with some reports of missing interior gaskets and manufacturing inConsistencies, raises questions about the overall reliability in preventing backdrafts under less-than-ideal conditions. In summary, while the Tjernlund BD-4 is seen as a high-quality, heavy-duty product suited for robust air flow scenarios, its performance may falter with lower-capacity systems unless modifications are made. **

Customer Reviews & Ratings

1 оценки клиентов
  • 5 звезда
    100%
  • 4 звезда
    0%
  • 3 звезда
    0%
  • 2 звезда
    0%
  • 1 звезда
    0%

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Плюсы

  • Solid Construction quality with durable materials
  • Good fit for standard 4-inch ducting
  • Effective at stopping backdrafts when installed correctly

Минусы

  • Springs are too strong for some applications, complicating use

Platform Trust & Buyer Confidence

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4.2/5 9477 отзывы
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“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
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10 September 2026 · via Trustpilot
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
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Product Price History

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TJS 1394

Закажите сейчас и получите товар приблизительно Monday, Октябрь 05

QTY:

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Fastest cross-border delivery

Особенности и преимущества

  • Constructed with galvanized steel for durability.
  • Features lightweight aluminum damper blades for efficient operation.
  • Spring-loaded design ensures positive closure against interior gaskets.
  • Available in a variety of sizes from 4in to 16in.
  • Usable as a replacement part for duct booster fans.
  • Easy installation for quick setup.

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