Model # EF-10 is not suitable for operation in unfiltered, dusty ducts. Please ensure that an upstream filter is installed and maintained; heavy dust requires seasonal removal and cleaning to prevent motor damage. Refer to the manual for maintenance details.
Tjernlund Duct Booster Fan, 10in., 475 CFM, Model# EF-10

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Shipping:
Factory shippedStore Pickup:
Not available - online only
- Easily installed in metal or flex ducting
- Suitable for air temperatures up to 150°
- Permanently lubricated shaded pole
- 24-g. galvanized steel housing, aluminum prop fan
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Description
Key Specs
Reviews
Q & A
Warranty
Compare
Product Summary
What's Included
- (1) Fan
Downloads

Features + Benefits
- Easily installed in metal or flex ducting
- Suitable for air temperatures up to 150°
- Permanently lubricated shaded pole
- 24-g. galvanized steel housing, aluminum prop fan
Key Specs
| Attribute | Specification |
|---|---|
item# | 517216 |
Brand | Tjernlund |
Manufacturer's Warranty | 1 year limited warranty |
Ship Weight | 11.0 LB |
Air Delivery | 475 cfm |
| Attribute | Specification |
|---|---|
Outdoor Rated | No |
Horsepower | 0.01 HP |
Volts | 120 |
Fan Diameter | 10 in |
Speeds (qty.) | 1 |
Reviews
Questions & Answers
Questions
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· 4 months ago
Is the motor safe for moving dust or will it damage the motor?
1 answer-
ProductExpert29· 3 months ago
Helpful?
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· 3 years ago
What is the overall length of this booster fan?
1 answer-
ProductExpert5· 3 years ago
The fan is 15-3/4" total length.
Helpful?
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· 6 years ago
to connect this fan to my residential A/C system to run at the same time the system is ON, and shut off when the system shuts OFF are any accessories necessary?
1 answer-
ProductExpert38· 6 years ago
Additional accessories are not needed to have this cycle with your heat or a/c.
Helpful?
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· 7 years ago
Can I get a 9 inch fan?
9 inch duct splits off to 8 and 7 in ducts.
Need a 9 inch fan before the split.
Does anyone make a 8 inch duct fan?
Can't find one anywhere.1 answer-
ProductExpert10· 7 years ago
At this time Northern Tool does not carry a 9" duct fan.
Helpful?
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· 9 years ago
can this fan run 24/7?
1 answer-
ProductExpert12· 9 years ago
The Tjernlund Duct Booster Fan can we wired to run constantly. It may shorten the lifespan of the fan but would not void the warranty.
Helpful?
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· 14 years ago
Can this fan be controlled by a thermostat in the room I'm drawing the air from?
Can this fan be controlled by a thermostat in the room I'm drawing the air from? ......This Duct Booster Fan would be placed in the crawl space over my family room and used to draw hot air (warmed by the ProCom PCD24TD Vent Free Log Set purchased from Northern in Jan-2012) through flex duct into the upstairs of my end-stairwell colonial style home. I would like to install it with a thermostat mounted near the air intake in the ceiling.
1 answer-
ProductExpert13· 14 years ago
This Tjernlund Duct Booster Fan can be used as a utility fan and controlled by a thermostat. The thermostat should be in the area you are trying to control.
Helpful?
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· 14 years ago
can these types of duct booster fans be used for ventalation of a room to the outdoors?
can these types of duct booster fans be used for ventalation of a room to the outdoors? similiar to a small whole house fan? I'm looking to take a small area and vent outdoors up an abandoned chiminey, will not be much static pressure.
1 answer-
ProductExpert13· 14 years ago
This Duct Booster Fan is designed for duct work, but could be used as a ventilation fan. Insulation contrary to manufacturer's installation instructions may void warranty.
Helpful?
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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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Specifications
475 cfm
598 cfm
875 cfm
No
No
No
0.01 HP
-
0.04 HP
120
120
120
10 in
-
12 in
1
1
1
-
140
-
-
No
-
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71 dB
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Gray
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Gray
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3,028 rpm
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Yes
-
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15.0000 lb
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15.5 x 11.25 x 13.5 in
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