The black motor lead wire is connected to the power source. The green wire is for ground purposes only. Wiring instructions are included with the blower. Wiring can vary per application.
Tjernlund Duct Booster Increases Heating and Cooling Power, 275 CFM

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Shipping:
Factory shippedStore Pickup:
Not available - online only
- Mounting Template: 4in. x 7in
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Description
Key Specs
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Features + Benefits
- Mounting Template: 4in. x 7in
Key Specs
| Attribute | Specification |
|---|---|
item# | 18000 |
Brand | Tjernlund |
Manufacturer's Warranty | 1 year limited warranty |
Ship Weight | 25.0 LB |
Compatible With | Heating and Cooling Duct |
| Attribute | Specification |
|---|---|
CFM | 275 cfm |
Amps | 0.51 |
Product Weight | lb |
Dimensions L x W x H (in.) | 7.0 x 4.0 x in |
Reviews
Questions & Answers
Questions
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· 2 years ago
How is this wired?
1 answer-
ProductExpert11· 2 years ago
Helpful?
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· 4 years ago
Can this be be installed on the side of a duct? Head height requirements would not be met if this was hanging down under the duct.
1 answer-
ProductExpert11· 4 years ago
The duct booster must be installed with the motor shaft horizontally. It can be installed either on the bottom or top of a horizontal duct or any side of a vertical duct.
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· 4 years ago
tjernlund duct booster fan video said use a ps1503 control to hook up to furnace. I can not find this on your web site
1 answer-
ProductExpert12· 4 years ago
The air pressure switch is currently not available online. Please contact our parts department at 1.800.657.0516 and reference part #TJPS1503.
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· 4 years ago
How loud is the fan? What is the sound rating in sones?
1 answer-
ProductExpert11· 4 years ago
The manufacturer does not have a decibel or sone rating on the fan.
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· 5 years ago
Will this install with fiberglass duct-board type of duct? Can it be installed from the top? Our central air A/C ducts are in the attic with no access to mount from below.
1 answer-
ProductExpert29· 5 years ago
This cannot be installed in a fiberglass duct-board type of duct. It also cannot be installed from the top.
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· 8 years ago
What is the maximum temperature air this will handle?
1 answer-
ProductExpert38· 8 years ago
The maximum temperature this duct booster will handle is 200 degrees Fahrenheit.
Helpful?
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· 11 years ago
can a dedicated 120v wall thermostat be used to control on off of this fan
1 answer-
ProductExpert6· 11 years ago
You would be able to set this up on a dedicated 120 volt wall thermostat.
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· 12 years ago
What is the RPM of the fan
1 answer-
ProductExpert30· 12 years ago
The RPMS on this Tjernlund duct booster fan is 1550.
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· 13 years ago
will this item work with a varaible speed control?
1 answer-
ProductExpert30· 13 years ago
This blower motor controller should not be a variable speed tap type, This should be wired to a on off switch or the high speed side of the furnace fan if you have a two speed blower on your furnace.
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· 15 years ago
What is the overall size. How much does it hang below the duct? length width and height?
1 answer-
ProductExpert10· 15 years ago
The overall dimensions for this unit is 7in. Length and 4in. diameter with a mounting template of 4in. x 7in as well. The item would install in ducts 5in. in diameter or more and in rectangular ducts at east 3 1/4in. deep.
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
Heating and Cooling Duct
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275 cfm
18.5 cfm
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50 cfm
0.51
0.16
15
0.17
lb
lb
3.0000 lb
lb
7.0 x 4.0 x in
6.25 x 5.5 x 5.5 in
11.0 x 5.0 x 8.0 in
9.75 x 3.75 x 10.0 in
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Steel
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20
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