Model # 3720

Internet #203749141

Store SKU #400327

Lasko 20 in. 3-Speed Weather Shield Performance Box Fan
0046013418807

Lasko

20 in. 3-Speed Weather Shield Performance Box Fan

  • Weather-Shield design is safe to use in windows
  • Three speeds deliver quiet performance
  • Unique grill enables high-velocity airflow
$2799 /each
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Frequently Bought Together

Product Overview

  • Weather-Shield design is safe to use in windows
  • Three speeds deliver quiet performance
  • Unique grill enables high-velocity airflow
Step up to Lasko's 3-Speed Weather Shield Performance Box Fan and enjoy the benefits of the Wind Ring system, featuring an exclusive grill design that focuses the air movement to increase its velocity. This high-performance fan runs on three quiet speeds and includes the exclusive Weather-Shield motor, making it safe to use in windows. Lightweight and easy to carry, it costs just two cents an hour to operate, helping you save on energy costs without sacrificing power.
  • Patented, isolated weather-shield motor for worry-free window use
  • 3 quiet speeds won't disrupt the room or surrounding area
  • Top-mounted controls make it easy to operate
  • Easy-carry handle for portability
  • High-performance grill is uniquely designed for ultimate airflow
  • Save-smart design costs less than two cents per hour to run
  • Wide body provides floor stability despite its lightweight frame
  • Patented, fused safety plug ensures worry-free operation
  • 2-year limited warranty
  • ETL listed for safety
  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Weather-Shield design is safe to use in windows
  • Three speeds deliver quiet performance
  • Unique grill enables high-velocity airflow
Model #: 3720
Sku #: 400327
Internet #: 203749141

Step up to Lasko's 3-Speed Weather Shield Performance Box Fan and enjoy the benefits of the Wind Ring system, featuring an exclusive grill design that focuses the air movement to increase its velocity. This high-performance fan runs on three quiet speeds and includes the exclusive Weather-Shield motor, making it safe to use in windows. Lightweight and easy to carry, it costs just two cents an hour to operate, helping you save on energy costs without sacrificing power.

  • Patented, isolated weather-shield motor for worry-free window use
  • 3 quiet speeds won't disrupt the room or surrounding area
  • Top-mounted controls make it easy to operate
  • Easy-carry handle for portability
  • High-performance grill is uniquely designed for ultimate airflow
  • Save-smart design costs less than two cents per hour to run
  • Wide body provides floor stability despite its lightweight frame
  • Patented, fused safety plug ensures worry-free operation
  • 2-year limited warranty
  • ETL listed for safety
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Price
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Name Premium 20 in. 3-Speed Box Fan 20 in. 3-Speed Weather Shield Performance Box Fan Weather-Shield Select 20 in. 3-Speed Box Fan with Thermostat 20 in. Power Plus Box Fan
Brand Lasko Lasko Lasko Lasko
Ratings (13) (91) (41) (74)
Assembled Height (in.) 21.3 in 4.5 in 23.188 in 20.75 in
Remote Control No No No No
Mounting style Standalone Standalone Standalone Standalone
Indoor/Outdoor Indoor Indoor Indoor Indoor
Number of Fan Speeds 3 3 3 3
View Product View Product View Product View Product

Specifications

Dimensions

Assembled Depth (in.)
21.5 in
Assembled Height (in.)
4.5 in
Assembled Width (in.)
22 in
Fan diameter (in.)
20
Product Depth (in.)
21.5
Product Height (in.)
4.5
Product Width (in.)
22

Details

Assembly Required
No
Color Family
White
Cord Length (ft.)
6
Fan Type
Box Fan
Grounded
No
Housing Material
Plastic
Indoor/Outdoor
Indoor
Ionizing
No
Mounting style
Standalone
Number of Fan Speeds
3
Product Weight (lb.)
10.10lb
Remote Control
No
Returnable
90-Day
Slip-resistant feet
No
Thermostat
No
Timer
No
Wheels
No

Warranty / Certifications

Certifications and Listings
ETL Listed
Manufacturer Warranty
2 year limited

Specifications

Dimensions

Assembled Depth (in.)
21.5 in
Assembled Height (in.)
4.5 in
Assembled Width (in.)
22 in
Fan diameter (in.)
20
Product Depth (in.)
21.5
Product Height (in.)
4.5
Product Width (in.)
22

Details

Assembly Required
No
Color Family
White
Cord Length (ft.)
6
Fan Type
Box Fan
Grounded
No
Housing Material
Plastic
Indoor/Outdoor
Indoor
Ionizing
No
Mounting style
Standalone
Number of Fan Speeds
3
Product Weight (lb.)
10.10lb
Remote Control
No
Returnable
90-Day
Slip-resistant feet
No
Thermostat
No
Timer
No
Wheels
No

Warranty / Certifications

Certifications and Listings
ETL Listed
Manufacturer Warranty
2 year limited

Questions & Answers

Can this be wall-mounted?

I am looking to mount it at a downward angle.
Asked by: Kate
Don't think. there are two small mounting slots on the bottom for these plastic stand pieces to keep the fan from tipping over. Possibly rig it up somehow to wall mount. But nothing straight straightforward
Answered by: Laskofanboy
Date published: 2017-10-11

How much energy does it consume?

I need the wattage, voltage, and amps.
Asked by: Pichi17un
Low 80 High ~100-120
Answered by: Laskofanboy
Date published: 2017-10-11

Do you use the window screen behind the fan when its installed in the window?

Asked by: Peg
I do but if you really need maximum air exhaust efficiency if its easy to remove the screen you might then have to worry about bugs
Answered by: Laskofanboy
Date published: 2017-10-11

CFM?

Asked by: valuedcustomer
But is it the same fan? That one has complaints of being noisy. This one is supposed to be super quiet. One would suppose that would change the CFM. Does it?
Answered by: BobF
Date published: 2017-07-25
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Customer Reviews

20 in. 3-Speed Weather Shield Performance Box Fan is rated 4.4 out of 5 by 91.
Rated 3 out of 5 by from This fan only puts out the same amount of air, as the other 2 made by the same company in the sam... This fan only puts out the same amount of air, as the other 2 made by the same company in the same price range. I own all 3 types and do not see any difference.
Date published: 2017-07-04
Rated 5 out of 5 by from I use it as exhaust fan in a 20 in. casement window. Perfect fit, held in place with elastic cor... I use it as exhaust fan in a 20 in. casement window. Perfect fit, held in place with elastic cord. With a window open on the opposite side of the house it ventilates the house at night or any other time it's too hot inside and cooler outside. The weatherproof feature is a nice touch. Exactly what I needed.
Date published: 2017-07-11
Rated 4 out of 5 by from Nice fan. Relatively quiet and moves a lot of air. Also appears to be well constructed. I didn... Nice fan. Relatively quiet and moves a lot of air. Also appears to be well constructed. I didn't give it a 5 because the handle feels so cheap. Every time I pick it up, I think the handle is going to break. I have only owned the fan for 2 months. Hopefully, I will just as happy in 5 years.
Date published: 2017-05-30
Rated 5 out of 5 by from We checked out this fan's rating online and found in... We checked out this fan's rating online and found in at Home Depot online. We are very satisfied. It is noisy but all box fans are. It is quieter than our other box fans though.
Date published: 2017-08-08
Rated 5 out of 5 by from I bought 2 more of these for use in my windows since they are weather resistant. Works great and ... I bought 2 more of these for use in my windows since they are weather resistant. Works great and is fairly quite.
Date published: 2017-09-05
Rated 5 out of 5 by from Fan Powerful and quiet unlike many other box fans .motor is insulated so that makes it quiter
Date published: 2017-08-02
Rated 5 out of 5 by from This Lasko fan was purchased during a heat wave/hot spell we had here on the left coast last mont... This Lasko fan was purchased during a heat wave/hot spell we had here on the left coast last month (September '17) - and it does its job quite well. Our old fan mostly just made a lot of noise but moved little air. This new Lasko fan moves an enormous amount of air and does it without the roar. Sure, it makes a little noise - but nothing like the old fan we had! We were surprised at how efficient it is because we didn't have to run it on the highest setting to comfortably cool the house. For the price, this fan is an absolute bargain and we just can't recommend it highly enough! Try one - you'll love it!
Date published: 2017-10-03
Rated 4 out of 5 by from Haven't had for very long, and we don't run them all the time-- we use to push smoke and odors ou... Haven't had for very long, and we don't run them all the time-- we use to push smoke and odors out of the house. But the air-power is good, the various speeds are what they should be, and the motor seems strong. Comes with a set of plastic feet stabilizers that attach by fitting into notches in the body & these are very cheap. One was defective and wouldn't fit into place; others fit, but did not stay in place. HD is having replacement feet sent though, so aside from this minor inconvenience, I'm pleased with the product.
Date published: 2017-08-27
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