Model # 3743

Internet # 203749145

20 in. 3-Speed Weather Shield Premium Plus Box Fan

This item has been discontinued.
The Home Depot no longer carries this specific product.



Model # 3743

Internet # 203749145

Customize your air circulation and conditioning with this Lasko Weather Shield 20 in. 3-Speed Box Fan. The fan's Weather Shield turbo motor design allows for weather-secure window use with enhanced power for the aerodynamic blades, which create enhanced air velocity. The wide body design contributes to the fan's floor stability and the ultra performance grill design produces concentrated air flow.

  • Patented, isolated Weather-Shield motor for worry-free window use
  • High performance grill for ultimate air flow
  • 3 quiet speeds
  • Top mounted controls
  • Easy-carry handle
  • Wide body design for greater floor stability
  • Save-Smart Less than 2-cents per hour
  • Patented, fused safety plug
  • 2-year limited warranty
  • ETL listed

Info & Guides

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Assembled Depth (in.) 
21.5 in 
Assembled Height (in.) 
4.5 in 
Assembled Width (in.) 
22.5 in 
Fan diameter (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Assembly Required 
Color Family 
Cord Length (ft.) 
Fan Type 
Box Fan 
Housing Material 
Mounting style 
Number of Fan Speeds 
Product Weight (lb.) 
10.87 lb 
Remote Control 
Slip-resistant feet 
Warranty / Certifications
Certifications and Listings 
ETL Listed 
Manufacturer Warranty 
2 year limited 


Brand: Lasko
Review Rating: 3 & Up
Assembled Height (in.): 4.5 in
Color Family: White
Indoor/Outdoor: Indoor
Ionizing: No
Mounting style: Standalone
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Rated 3.9 out of 5 by 15 reviewers.
Rated 3.0 out of 5.0 by Noisy and unstable Fan has limited features for the price. It's just a basic box fan, that's it. The fan itself is very loud and noisy. I have to keep it on the lowest setting if I use this at night while sleeping. Also, I'm severely disappointed in the stability of the fan. It has a tendency to tip over when brushed against. It is not the most stable unit I have ever owned. It seems top heavy thus contributing to its tendency to tip over. This would be an important consideration if you have little kids.. Overall construction is very good and it seems well made. I have had good luck with Lasko products in the past. hope to get plenty of service out of this unit. I'll recommend the unit with reservations due to how loud it is at higher speeds. December 18, 2013
Rated 4.0 out of 5.0 by Better than the regular "Weather Shield". This is an inexpensive box fan, but it works great as we have no A/C. [] We stack two of them in the window w/o the legs and secure them with a bungee. [] We need one fan per 100 sq ft on hot California days. [] I like the larger selector knob. [] It is only a couple of watts more than the original. [] If you like box fans, get the WEATHER SHIELD PREMIUM PLUS. [] But remember, this is a machine and you should not drop it. [] As usual, The Home Depot ships quickly for only a few dollars, or free. August 14, 2013
Rated 5.0 out of 5.0 by Used for Garage fan Quiet in low speed. Good volume of air and light weight December 10, 2014
Rated 4.0 out of 5.0 by Great window fan. This fan is very good it's far more durable and well built then the lower end Lasko fans(which are still great by the way). It's a much more solid fan and just feels like it's much higher quality and all for only a little bit more money then the baseline fan. It moves much more air through it and is actually not all that loud even on it's highest setting(it's not whisper quiet but it's surprisingly quiet for how much air it moves) The only real problem I had is that the fan is a bit thicker then the lower end models which is likely the reason this one is so solid. But because of this it doesn't fit my window as well as it could but it's still not that much of a problem as windows vary from place to place. Overall a very solid window fan and a great value for only a little more compared to the baseline model. December 24, 2013
Rated 1.0 out of 5.0 by Disappointed Unit arrived damaged. Was not evident until I turned it on. The front grill was warped inwards and rubbing against the inner hub of the fan blade. Rubs so much the motor hardly turns. Upon further inspection it appears the box was laid flat at the warehouse with something heavy placed on top of the box which caused this condition. Too bad because otherwise the fan appears well constructed for the money. Returning the item for a replacement. March 21, 2014
Rated 5.0 out of 5.0 by Excellent value for the money! This fan moves a lot of air and the three speeds are handy also. It is fairly well made and with care should work through a long hot summer (at least). It is light and easy to move around and I added 2 attachments and have it hanging from my shop ceiling and remove it when I am through working there so it won't get dirty. For the price it is a good buy. May 24, 2014
Rated 4.0 out of 5.0 by Box Fan Plus Compact lightweight floor and window fan. Low setting is just a tad more than I would want but at this price it's still a good value. August 5, 2014
Rated 4.0 out of 5.0 by Good fan Overall seems like a good fan. It cools the house well. I do have to echo the other comments about the noise the cover makes when it rubs on the ban blades. Mine wasn't as bad as some of the other comments but it does happen. It wasn't bad enough to return it but the maker should correct the issue. July 1, 2014
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