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Fan Type
Booster Fans
Duct Size
6" Duct
110V AC
Ease of Installation
Advanced (Installs > 60 minutes)
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Automatically Starts Up and Powers Down in Conjunction with Your Furnace or Air Conditioning for More Effective Climate Control
Tjernlund EF-6 AUTO Automatic Duct Booster Fan - 6 Inches
Tjernlund EF-6 AUTO Automatic Duct Booster Fan - 6 Inches
Tjernlund EF-6 AUTO Automatic Duct Booster Fan - 6 Inches
Item# 32519
Price: Normally $290.00 
Hot Deal $149.96
Free shipping on orders over $175 - See Details


  • Durable heavy gauge housing with metal prop fan blades
  • Can be installed in less than 10 minutes - insert it into the duct run and plug it in
  • Withstands air temperatures up to 150 degrees F (65 degrees C)
  • Can be installed in metal or flex ducting

Essential Info

Make your existing HVAC system more effective by increasing air flow with this duct booster fan. The fan features a 115 VAC power cord and built-in Pressure Response Control (PRC) unit to automatically operate when your forced air system is running. When positive pressure is sensed, the PRC turns the fan on to channel the hot or cool air into the selected room. Pressure checks are automatically performed to determine whether the fan should continue to run. The fan will even continue to run for a short time after the heating or cooling system has turned off to ensure every last bit of the heated or cooled air makes its way out of the duct.

Heavy gauge steel housing and metal prop fan blades make this duct booster fan ultra-durable. If installed where your system's filters are properly positioned and maintained, this fan or its motor will not require any cleaning. The fan's operation will be so smooth and quiet you might forget that it is running.


What's Included

  • 1x - 6-Inch Automatic Duct Booster Fan

  • Specifications

    Manufacturer Product No.EF-6 AUTO
    Motor RPM3000
    Cord Length5 feet
    Dimensions6" Diameter x 6.5" D
    Weight3.53 lbs
    Warranty1 year, limited

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: Tjernlund Products Inc, Tel: (800) 255-4208 Ext


    9 Ratings
    5 star: 33%  (3)
    4 star: 33%  (3)
    3 star: 0%  (0)
    2 star: 11%  (1)
    1 star: 22%  (2)
    Average Customer Rating
    (9 customer ratings)
    Share your thoughts with other customers
    KENNETH E -- hummelstown, PA   2/13/2014
    Works as designed. It is louder then I expected.
    BRAD -- springfield, IL   2/3/2014
    The unit is about 2 feet from the trunk line and is still very loud. Also, pressure switch is not sensitive enough and you have to give it an assist to start the fan.
    RUVIM -- portland, OR   1/15/2014
    Save your money, do not buy. Got this fan hoping to boost airflow to a duct in bedroom. Hooked up per instructions, this booster made plenty of noise but did not help at all. In retrospect, I should have bought a more powerful booster with a separate switch. Avoid this one !!
    Skip -- Tustin   12/7/2013
    I bought this booster fan about 4 months ago because my home office was always colder in the winter and warmer in the summer than the rest of the house. It was at the end of the line and just didn't get enough heat or A/C. The install was easy. Took less than an hour. Now that I've had a chance to experience it working both with A/C and heat, I have to say, it's amazing. For my purposes, it was well worth the price. I can hear it running but it's not loud I actually like that I can hear it so I know when it's on. Occasionally, it will kick on when the strong Santa Ana winds blow, but that's not very often. I guess gusts of wind get in the system and trigger the switch.
    JAMES -- northville, MI   12/7/2012
    I have not installed it yet, but it appears to be as described. Delivery was prompt
    JAN -- meridian, ID   10/25/2012
    Your delivery was fast and with no complications. Thank you
    JAMES -- hudson, ME   3/15/2012
    Very professional company to deal with
    RODNEY -- lafayette, IN   12/1/2011
    It works as intended . wish that it would shut off sooner

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