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Tjernlund Booster Fan — 8in., 300 CFM, 120V, Model# EF-8

Item# 18005
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Tjernlund Booster Fan — 8in., 300 CFM, 120V, Model# EF-8

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Tjernlund Booster Fan — 8in., 300 CFM, 120V, Model# EF-8

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$109.99

  • Shipping: 

    Factory shipped

  • Store Pickup: 

    Not available - online only
  • Powerful Airflow (Up to 325?CFM): Delivers robust airflow in 8" ducts, helping overcome static pressure drops and ensuring even heating or cooling in distant or underserved areas of your home.
  • Heavy-Duty Galvanized Steel Housing: Built for durability and heat resistance (up to 150?°F), this robust housing protects the motor and blade assembly and withstands long-term use in HVAC systems.
  • Metal Fan Blade with C-Frame Motor: Equipped with a high-performance metal fan blade and C-frame motor architecture for consistent speed and better pressure-handling capability than plastic-blade models.
  • Low Power Consumption: Operates on only 56?W (1.1?A at 120?V), keeping energy usage minimal while still providing significant airflow gains—a more efficient option than running an oversized HVAC blower.
  • Minimal Maintenance & Simple Control Options: Designed to work with standard HVAC filters so no blade cleaning is needed. You can control the fan manual on/off, use Tjernlund’s optional SC?1 speed controller, or automate operation with a duct-mounted airstat sensor.

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  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Warranty

  • Compare

Product Summary

The Tjernlund Register Booster Fan is designed to significantly enhance airflow through your 4in. x 12in. floor register, delivering up to 75 cubic feet per minute (cfm) of air. This efficient and easy-to-install fan can be set up in less than a minute, making it a convenient solution for improving air circulation in your home or office. Manufactured in the U.S.A., this booster fan ensures reliable performance and durability, helping to maintain a comfortable and well-ventilated environment. Whether you need to boost airflow to a specific room or improve overall air distribution, the Tjernlund Register Booster Fan is an effective and practical choice.

What's Included

    (1) Booster fan

Downloads

Product Manual
Play Item Video

Features + Benefits

  • Powerful Airflow (Up to 325?CFM): Delivers robust airflow in 8" ducts, helping overcome static pressure drops and ensuring even heating or cooling in distant or underserved areas of your home.
  • Heavy-Duty Galvanized Steel Housing: Built for durability and heat resistance (up to 150?°F), this robust housing protects the motor and blade assembly and withstands long-term use in HVAC systems.
  • Metal Fan Blade with C-Frame Motor: Equipped with a high-performance metal fan blade and C-frame motor architecture for consistent speed and better pressure-handling capability than plastic-blade models.
  • Low Power Consumption: Operates on only 56?W (1.1?A at 120?V), keeping energy usage minimal while still providing significant airflow gains—a more efficient option than running an oversized HVAC blower.
  • Minimal Maintenance & Simple Control Options: Designed to work with standard HVAC filters so no blade cleaning is needed. You can control the fan manual on/off, use Tjernlund’s optional SC?1 speed controller, or automate operation with a duct-mounted airstat sensor.

Key Specs

AttributeSpecification

item#

18005

Brand

Tjernlund

Manufacturer's Warranty

1 year limited warranty

Ship Weight

4.25 LB
AttributeSpecification

Compatible With

Heating Ducts

CFM

300 cfm

Product Weight

lb

Dimensions L x W x H (in.)

8.0 x 9.0 x in

Reviews

Questions & Answers

11 Reviews This action will navigate to reviews.

Questions

1–10 of 14 Questions  
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  1. Ductwork Type?

    Is it possible for this to be installed in my existing rectangular ductwork?

    1. The only way you could make this unit work with rectangular ducts would be to get adapters to go from rectangular duct to round duct then another adapter to go from round back to rectangular. As the staff member indicated, there are other fans that are intended for use with rectangular ductwork.

      Helpful?

    2. The booster fan is designed for use with standard 9 inch diameter circular duct. It will not effectively work in square or rectangular ducting. Please see the attached link for a product offered through Northern Tool that would work with your rectangular duct work.

      Helpful?

  2. What is the heat limit on fan

    1 answer

    1. The max air temperature this can handle is 150 degrees.

      Helpful?

  3. Does this have a permanent split capacitor motor

    1 answer

    1. The blower does not have a permanent split capacitor motor.

      Helpful?

  4. Can this fan be used as a variable speed fan when used with a 120V wall mounted dimmer switch?

    1 answer

    1. This booster fan can be used as a variable speed fan when used with the optional speed control from the manufacturer, model #SC-1. It cannot be wired to a dimmer switch for variable speed.

      Helpful?

  5. What is the db rating of this fan?

    1 answer

    1. The manufacturer does not rate these booster fans for a decibel rating.

      Helpful?

  6. Can this be used in a small chimney to improve draft above a gas grill?

    1 answer

    1. The fans are designed to increase the flow of heated air in a warm air heating system or cooled air in a central air conditioning system. It would not be recommended for this application.

      Helpful?

  7. I need this in a six inch fan/duct we used to be able to get from you

    1 answer

    1. See our item #18000. This booster fan can be installed in a 5 inch diameter or larger duct.

      Helpful?

  8. Is the motor case sealed to prevent dust getting into it?

    1 answer

    1. This item has a C-Frame motor that is not completely sealed however there would be no concern for dust or sparks with this unit.

      Helpful?

  9. What is the noise level of this fan?

    1 answer

    1. This fan could have differing sound levels depending on variables such as applications used in and if you were to use a speed controller.

      Helpful?

  10. Can you use the 18005 as a primary source fan

    1 answer

    1. This is a booster fan that is designed to enhance air flow to one room only.

      Helpful?

Warranty

Manufacturer's Warranty

1 year limited warranty

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Replacement Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.

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Tjernlund Booster Fan — 8in., 300 CFM, 120V, Model# EF-8
4.8 out of 5 stars. 11 reviews

Tjernlund Booster Fan — 8in., 300 CFM, 120V, Model# EF-8

Item # 18005

$109.99