lasko 20" 3-speed premium box fan with durable steel body front-facing view of a black 20-inch box fan with five-blade propeller, concentric protective grille, built-in top carry handle and top-mounted speed knob; blue streaks indicate high-velocity airflow for room ventilation and window exhaust, suitable for circulating air in bedrooms or garages.
Lasko 20" 3-Speed Premium Box Fan with Durable Steel Body
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Lasko

Lasko 20" 3-Speed Premium Box Fan with Durable Steel Body

|3 ratings

Smart summary

Generated by AI
  • Cools Rooms Fast

    Cools Rooms Fast

    The WindRing system delivers 20% more air velocity for faster room cooling.
  • Safe For Windows

    Safe For Windows

    The weather-resistant motor lets you safely bring in fresh outdoor air.
  • Easy To Carry

    Easy To Carry

    A built-in handle makes it simple to move between your rooms.
  • Sturdy Steel Frame

    Sturdy Steel Frame

    The rugged steel body and wide base keep the fan stable during operation.
  • Three Speed Settings

    Three Speed Settings

    Top-mounted manual controls let you easily adjust from gentle to powerful airflow.

Specifications

Key Features Specifications
Dimensions 4.75"L x 21.25"W x 22.5"H
Voltage 120 Volts
Cord Length 72 Inches
Materials Aluminum, Copper, Steel, PP, Cordset
Built-In Safety Equipped with Lasko's trusted, fused safety plug. The Blue Plug shuts off power if electrical fault is detected.
ETL Listed Yes
Assembly Simple assembly required
Current price is $39.98
Prices may vary in club and online
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Shipping

Columbus, 43215
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About this item

Product details

Powerful High-Velocity Airflow

Experience exceptional cooling with the Lasko B20911 20” Box Fan, delivering up to 2,000 CFM of high-performance airflow. The advanced WindRing® system enhances air velocity by up to 20% compared to standard box fans, ensuring faster room cooling and improved ventilation. Use it independently or alongside your air conditioner to efficiently circulate cool air throughout your space.

Durable and Portable Design

Built with a rugged steel body and a wide, stable base, this box fan offers long-lasting durability and stability during operation. The built-in carry handle makes it easy to move the fan wherever cooling is needed, whether in bedrooms, living rooms, garages, or workshops.

Safe for Window Use

Equipped with a Weather Shield® motor, this fan is designed for safe window placement, making it perfect for bringing in fresh air or exhausting stale air from any room. Its sturdy construction ensures reliable performance even in window settings.

Customizable Cooling Options

Adjust airflow to your preference with top-mounted manual controls and three fan speeds, ranging from gentle circulation to a powerful breeze. The 6-foot power cord allows for convenient placement near outlets, while simple assembly ensures hassle-free setup.

Safety and Warranty

ETL listed and featuring Lasko’s Blue Plug® safety fuse technology, this fan provides peace of mind by cutting power if a hazardous electrical fault is detected. Backed by a 2-year limited warranty, the Lasko B20911 offers dependable performance and added confidence.

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Key specifications

Specifications

Key Features Specifications
Dimensions 4.75"L x 21.25"W x 22.5"H
Voltage 120 Volts
Cord Length 72 Inches
Materials Aluminum, Copper, Steel, PP, Cordset
Built-In Safety Equipped with Lasko's trusted, fused safety plug. The Blue Plug shuts off power if electrical fault is detected.
ETL Listed Yes
Assembly Simple assembly required
Warranty 2-Year limited warranty

Member ratings & reviews

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Showing 1-3 of 3 reviews

Aug 2, 2026
Reviewer name: anonymous
5 out of 5 stars
5 out of 5 stars review

great lansko fan

it was a great fan , kept it in bedroom in apartment to keep me cooler and keep outside noise out and its not like the 20.00 walmart fans extremely quiter. i used every day most times 24 hr a day. but like the review where some said only last couple years. mine has lasted three years. but i mean its a 40.00 fan . if u wanted a lifetime fan go get a dyson , or whatever. but this was by far my favoriye lansko fan. so forget what others say. it worth the 40 and last a long time if u keep it going 24/7 for three years. most of time. it has just started making a small noise on and off. so i went and got another one

Helpful?75G189DDKRDS18320254853
reply from Lasko Product Expert

We're delighted to hear how much you've enjoyed your fan! It's wonderful to know that it helped keep you cool, reduced outside noise, and provided reliable performance for three years of near 24/7 use. We also appreciate you sharing your honest experience and continued confidence in Lasko by purchasing another one. Thank you for your support and for taking the time to share your feedback. We're happy to hear that this has been your favorite Lasko fan!

Jun 7, 2026
Reviewer name: anonymous
5 out of 5 stars
5 out of 5 stars review

A great box fan

Moves very good air for the price and is 100% worth it to buy

Helpful?75G189DDKRDS18320254853
Jul 20, 2026
Reviewer name: William
2 out of 5 stars
2 out of 5 stars review

only lasted a couple of years

Helpful?75G189DDKRDS18320254853
reply from Lasko Product Expert

Thank you for your response. I'm sorry to hear that the unit only lasted a couple of years. I understand how disappointing that can be, and I'd be happy to help. As a troubleshooting step, please try resetting the unit: Turn the unit OFF. Unplug the unit from the power outlet. Leave it unplugged for 10-15 minutes. Plug the unit directly into a wall outlet. Turn the unit back on and test its operation. If the issue persists after completing these steps, please contact our Customer Service team for further assistance: Lasko Products: Contact Us https://lasko.com/pages/contact-us We appreciate your patience and look forward to assisting you further.

Current price is $39.98
Prices may vary in club and online
How do you want your item?

Shipping

Columbus, 43215