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Lasko Cool Colors 20" 3-Speed Weather Resistant, Energy Efficient Box Fan, B20309, Purple

4.5 stars out of 36465 reviews
(4.5)|
36.4K ratings
Lasko Cool Colors 20" 3-Speed Weather Resistant, Energy Efficient Box Fan, B20309, PurpleLasko Cool Colors 20 3 Speed Weather Resistant Energy Efficient Box Fan B20309 PurpleLasko 20 Cool Colors 3 Speed Box Fan with Weather Resistant Motor Blue 22 5 High B20310 NewLasko 20 Classic Box Fan with Weather Resistant Motor 3 Speeds 22 5 H White B20200 New3 pack Lasko 20 Cool Colors 3 Speed Box Fan with Weather Resistant Motor Blue 22 5 High B20310 New3 pack Lasko 20 Classic Box Fan with Weather Resistant Motor 3 Speeds 22 5 H White B20200 NewLasko Cool Colors 20 3 Speed Weather Resistant Box Fan Black B20301 New3 pack Lasko Cool Colors 20 3 Speed Weather Resistant Box Fan Black B20301 New
Actual Color:Purple-Out of stock
Black, $26.38
Blue, $25.97
White, $23.86
selected, Purple, $23.98, Out of stock
Pack Size:Single-Out of stock

Key item features

  • High Volume Airflow: Slim 20 inch box fan provides high volume air movement
  • Energy Efficient: Energy-efficient fan helps keep you feeling cooler while spending less than 2 per hour to operate
  • Easy Controls: Top-mounted manual controls are easy to reach
  • Multiple Speeds: 3 high-performance fan speeds
  • Weather Resistant: Weather-resistant motor for worry-free window use
  • Durable Construction: Durable steel frame with safe, rounded corners
  • Safety Features: Equipped with Lasko's trusted, fused safety plug
  • Enhanced Cooling: Use in conjunction with an air conditioner to boost cooling airflow
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Current price is $23.98
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4.5 out of 5 stars
stars36.4K ratings11.7K reviews
How item rating is calculated
  1. 5 stars78% (28.3K)
  2. 4 stars9% (3,195)
  3. 3 stars4% (1,516)
  4. 2 stars2% (801)
  5. 1 star7% (2,615)

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Showing 1-3 of 11,755 reviews

May 7, 2025
skatingangel
Item details
Color: Black
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Excellent Box Fan. Will Keep you COOL!!😎

Excellent Box Fan. Great for circling air around, especially if you have a room that doesn't have a ceiling fan. Living in Florida you need fans even with air conditioning. Works great to keep your electric bill down so you can turn the thermostat up a few degrees %26 use the fan to circulate the air, which makes it feels three to five degrees cooler.

Helpful?48ba90b0-0b0e-11f1-8e30-63e7131886fb42388501
Apr 7, 2025
Walter
Item details
Color: Blue
5 out of 5 stars review

Verified Purchase

LASKO box fan 20 inch with weather proof motor.

I use this fan to draw out under house odors. It is mounted on the crawl space entrance door, turned on low and forgotten. It runs continuous and last about three years. The motor holds up far beyond 3 years but the plastic blades are warped from the sun, so even still running the blades don't push air any longer. Still a great purchase, other fans I've tried didn't last a year, The motors would go out on them.

Helpful?48ba90b0-0b0e-11f1-8e30-63e7131886fb42388501
Jan 21, 2026
MyTakeOnThis
Item details
Color: White
5 out of 5 stars review

Verified Purchase

Excellent for Corsi Rosenthal Box

I used this to build a Corsi Rosenthal box. It's an amazing kind of air filter built inexpensively that's as good as an extremely expensive air filter. This fan is often recommended because it is just right, and it is! Excellent. A relatively inexpensive fan that can be turned into something worth forty times more. At low speed, the optimal one, I have to look over to know it's on.

Helpful?48ba90b0-0b0e-11f1-8e30-63e7131886fb42388501