Shutter Mounted Wall Exhaust Fan w/ 9' Cord & Plug 20 Inch 3340 CFM Variable Speed 20SF4V180C

Build Time:
7 to 10 Business Days ?
Ships By:
FedEx Ground

Build Time

The product Build Time you see represented on this site is only a typical number of days the manufacturer states it needs to build the product(s) when ordered. Build times are based on business days (excludes weekends & holidays).

The build time does not include the time it will take to ship the order to you (the customer). If an order has multiple items and comes from multiple warehouses, you may receive part of your order on one day, and then receive the remaining part(s) of your order at a later date.

*Please be aware that seasonal demand of certain equipment may cause build times to run longer than what is typical.

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Only $229.29

Shutter Mounted Exhaust Fan is perfect for removing excess heat, moisture, dust and odors from virtually any residential or commercial space. Applications include: workshops, welding rooms, restaurants, factories, warehouses, barns, and greenhouses.This wall mounted exhaust fan features aluminum blades, OSHA compliant wire guards, and automatic gravity shutters that open and close in conjunction with the operation of the fan. The completely enclosed motor is thermally protected and permanently lubricated.This fan comes fully assembled and ready to install out of the box.


High efficiency, quiet operating
Variable speed capable models for use with variable speed controls
Sizes 8” - 24” pre-wired with 9ft grounded cord—115v
Guards feature industrial gray polyester powder coating, OSHA spacing
“Rounded” guard design prevents excessive vibration, adds rigidity
Heavy duty aluminum shutters with reinforced corners
Weather stripping on louvers provide maximum seal, prevents rattling
Motor Type: TEAO, IP55 rating
Fans are UL705 certified

Dimensions: 23"W x 13"D x 23"H.

Rough In-Opening: 20.5” x 20.5”

Model No.:
Exhaust Fans
Blade Material:
Blade Size (Inches):
CFM High:
Decibels (dBA):
7.01 sones @ 10'
Dimension Inches:
Width: 23" Depth: 13" Height: 23"
Drive Type:
Limited Warranty:
2 Year Limited
Motor Type:
Totally Enclosed
Weight lbs.:
Notice: Manufacturer's products features and specifications are subject to change without notice.
California Residents: warning WARNING- This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, please visit


Ask a Question
  • What wiring is required between the speed controller and fan?

    Thank you for your question.  Linked below are the wiring instructions for a variable speed controller.

  • Using the Variable Speed Control, what is the low end CFM and noise estimate? Are the louvers all connected so that they all operate together?

    Thank you for your question.  The manufacturer only provides the high CFM rating of 3340 and a 7.10 sones at 10', which is at the high setting. 

    The louvres are gravity operated, and utilize a tie bar so they all open/close at the same time.

  • Is the weather hood required for mounting to exhaust to the outdoors or are these weatherproof as is?

    The weather hoods are not required. They are designed to be added protection against driving winds and rain.

  • Can these fans be purchased without the shutters...just the fan and motor?

    No. These are pre-packaged fan assemblies.

  • how many watt s is the motor in this model , AirFlo-NF Shutter Mounted Wall Exhaust Fan 20 Inch w/ 9' Cord & Plug 3050 CFM Variable Speed 20NFSF4VN ?

    The manufacturer does not rate their fans in watts.  This fan draws 2.4 amps at 115 volt or 1.2 amps at 230 volt.