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(3 pack) Lasko 20" Weather-Shield Performance 3-Speed Box Fan, 2000 CFM, White, 3720

4.3 stars out of 490 reviews
(4.3)|
490 ratings
(3 pack) Lasko 20" Weather-Shield Performance 3-Speed Box Fan, 2000 CFM, White, 37203 pack Lasko 20 Weather Shield Performance Box Fan with 3 Speeds 3720 White 22 5 High NewLasko 20 Weather Shield Performance Box Fan with 3 Speeds 3720 White 22 5 High New
Pack Size:3 Pack-Out of stock

Key item features

  • Powerful Airflow: Features a 20-inch box fan design with a high-performance grille for ultimate airflow and cooling in any room.
  • Customizable Cooling: Offers 3 refreshing speed settings to personalize your cooling experience.
  • Energy Efficient: Boasts Save-Smart energy efficiency, costing less than 2 cents per hour to operate.
  • Weather-Shield Motor: Equipped with a patented Weather Shield motor for worry-free indoor window use.
  • Stable Portable: Wider fan body structure provides greater stability, complemented by a lightweight design and convenient carry handle for easy portability.
  • Enhanced Safety: Includes Lasko's trusted, fused safety plug for added peace of mind and Blue Plug safety fuse technology.
  • Versatile Application: Ideal for circulating cool air with air conditioning in bedrooms, living rooms, home offices, and garages.
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Current price is $114.00$38.00/ea
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This item includes:

  • 3-pack of Lasko 20" Weather-Shield Performance 3-Speed Box Fan, 2000 CFM, White, 3720

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Customer ratings & reviews

4.3 out of 5 stars
stars490 ratings289 reviews
How item rating is calculated
  1. 5 stars72% (351)
  2. 4 stars10% (48)
  3. 3 stars5% (24)
  4. 2 stars2% (10)
  5. 1 star12% (57)

Reviews summary

Pros
  • : Has three speed settings for adjustable power.
  • : Fits stably in window for outdoor use.
  • : Fits snugly on window frames and openings.
  • : Offers good value at this cost.
Neutral
  • : Can be quiet, but also loud on higher settings.
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Showing 1-3 of 289 reviews

Feb 6, 2026
Layal
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Practical fan

This 20” weather-shield performance 3-speed box fan (2000 CFM) in the white color from Lasko is a great device and option if you're looking to have a cool ambiance on a hot day! It's effective and practical to use and set up on 3 different modes. It's affordable and definitely recommended.

Helpful?37D1A429U1HU14172817191
Jan 22, 2026
Stacy
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Excellent window fan

10/10 fan Very powerful It arrived pretty fast I recently purchased the window lasko window fan to help cool down my Bedroom/Living Room and overall, I'm very satisfied. It does its job I recommend it

Helpful?37D1A429U1HU14172817191
Aug 24, 2022
Mel
5 out of 5 stars review

Verified Purchase

How to use a fan for a long life.

I have a theory, with logic and conclusion. First the observation: The makers of this fan made it so that when you turn it on, the first setting available is high, then medium, then low. The logic: Since we all know that getting a motor running requires more power than it does to just continue running, not allowing a full start up is hard on the motor. So if you quickly go to medium setting without letting the high setting run for a few seconds, you may in fact be shortening the life of the motor. The conclusion: If we want this fan to have maximum lifespan, we should, when starting up, allow a few seconds in High setting before going to Medium. And to take it one step further, we likewise should allow a few seconds in Medium before going into low. Perhaps this explains why some fans end up kinda slow, and others do not. Though admittedly theory, it is based on known startup demands of motors. At any rate, I am going to follow this procedure in the hopes my fan has a long life! So far so good.

Helpful?37D1A429U1HU14172817191