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
$24.98 /each

Frequently Bought Together

Product Overview

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
  • Three 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

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Name 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 Weather-Shield Select 20 in. 3-Speed Box Fan with Thermostat
Brand Lasko Lasko Lasko Lasko
Ratings (477) (56) (30) (9)
Assembled Height (in.) 22 in 4.5 in 23.188 in 23.188 in
Indoor/Outdoor Indoor Indoor Indoor Indoor
Mounting style Standalone Standalone Standalone Standalone
Number of Fan Speeds 3 3 3 3
Color Family White White Black Gray
Ionizing No No No No
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Customer Questions & Answers

4 Questions7 Answers

Customer Questions & Answers

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

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3 answers

Can this be wall-mounted?

This question is from 20 in. 3-Speed Weather Shield Performance Box Fan
Asked by
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June 27, 2015
I am looking to mount it at a downward angle.
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Answers (3)

Asked by
monticello, N.Y.
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September 20, 2016
Answer: 
I do not think it is meant to be put on a wall and is best if placed in a window for air circulation.
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Asked by
NYC
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Home Improvement Profile: DIYer
July 6, 2016
Answer: 
Not at all easily. This fan has no mounting holes, brackets, or other hardware, it's intended to sit on a flat surface like the floor or a windowsill. Not to mention that it would not work properly without significant clearance in the back (where it's pulling air from). Monting it within a few inches of a wall would put a heavy strain on the motor and greatly reduce the airflow. And since the controls Read More
Not at all easily. This fan has no mounting holes, brackets, or other hardware, it's intended to sit on a flat surface like the floor or a windowsill. Not to mention that it would not work properly without significant clearance in the back (where it's pulling air from). Monting it within a few inches of a wall would put a heavy strain on the motor and greatly reduce the airflow. And since the controls are on top of the fan, I really can't imagine how you'd control it, unless you just set it to one speed and then used an extension cord with a remote switch or something like that.
I don't mean this in a rude way but, basically, "if you have to ask", you probably won't want to try. It would be more than a minor "project" even for someone with some DIY experience and a degree of McGyver-esque ingenuity.
I don't know if Home Depot carries them, but fan manufacturers do make wall-mountable, oscillating fans. They're (obviously?) quite a bit more expensive than this item, but their design makes that more or less a given. It sounds like one of those would be your best bet. Read Less
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Asked by
Seattle
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July 3, 2015
Answer: 
You would have to custom mount it with straps or something. The frame is plastic so you can just screw mounts or straps wherever is needed. Be sure you can reach the knobs.
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2 answers

How much energy does it consume?

This question is from 20 in. 3-Speed Weather Shield Performance Box Fan
Asked by
San Antonio, Texas
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June 9, 2015
I need the wattage, voltage, and amps.
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Asked by
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September 20, 2016
Answer: 
I really don't know but I think it only costs pennies to operate. Details are in the product information on line.
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Asked by
Seattle
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July 3, 2015
Answer: 
You will have to check their website for the specifics. According to the product description -Save-Smart design costs less than 2-cents per hour to run. Doesn't say if that is on low med or high.
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2 answers

CFM?

This question is from 20 in. 3-Speed Weather Shield Performance Box Fan
Asked by
NJ
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May 11, 2015
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Asked by
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September 3, 2016
Answer: 
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?
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Asked by
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Home Improvement Profile: DIYer
November 18, 2015
Answer: 
Per the same Lasko 20 in. 3-speed fan without the weather shield it runs up to 2500 CFM (on fastest speed).
http://www.homedepot.com/p/Lasko-20-in-3-Speed-Box-Fan-3733/100405665
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0 answers

what is the RPM of each variable speed of the fan?

This question is from 20 in. 3-Speed Weather Shield Performance Box Fan
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May 15, 2016
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Customer Reviews

20 in. 3-Speed Weather Shield Performance Box Fan is rated 4.5 out of 5 by 56.
Rated 5 out of 5 by from Looks well built It's a fan. They all kind of look alike but this appears to be built better and moves more air than my discount store specials. It has a metal frame and plastic blades and grills. My last cheapie fan fell out of the window and the blades broke. Not sure if this fan would survive that fall but I'm sure it will get it's chance. The motor does appear to be protected from the elements so I'm not as concerned about it during a light rain. I will probably buy another to use outside under the awning of the RV just because of the protected motor.
Date published: 2016-11-08
Rated 1 out of 5 by from The product is named, "Weather Shield." The description says, "Patented, isolated Weather-Shield ... The product is named, "Weather Shield." The description says, "Patented, isolated Weather-Shield motor for worry-free window use." The fan is shipped with a sticker that clearly says it is not for use in a window. I will not purchase from this manufacturer again since they choose to play ridiculous liability games. Home Depot should stop selling this brand since HD is typically good about being clear about products and standing behind their sales.
Date published: 2017-01-03
Rated 5 out of 5 by from Great Fan I have always liked the Lasko fans. They seem to produce more air flow than many of the other brands. In recent years the less expensive ones have faltered and not done as well. The Weather Shield, though, is still a great fan. No fan is truly quiet but these are as quiet as can be expected for the volume of air they push out. And they're durable and safe in an open window.
Date published: 2016-09-13
Rated 5 out of 5 by from very good fan I did a fair bit of looking around (yeah, I know, "for a fan?") and came across a very detailed review of several fans that included their flow rates, sound in dB, etc. (someone had too much time on his hands!). That review included this fan as one of the two recommended fans and, so far, it has lived up to the conclusions of that comprehensive fan "study".
Date published: 2016-10-18
Rated 5 out of 5 by from Exactly what I needed. Special feature of weather protected electrical box is exactly what I needed. I can put the fan in the window and not worry about the high humidity or light rain, rusting out the fan mechanism. My working area requires good air flow, and the quiet fan works great. Good air flow at all levels.
Date published: 2016-09-27
Rated 5 out of 5 by from Moves a vast quantity of air After reading the reviews at Home Depot I bought this 20" box fan for a church gym where we play volleyball. It is lightweight but sturdy and moves a vast quantity of air. It is loud on the high setting, but that's what you need if you want to push a lot of air.
Date published: 2016-09-13
Rated 4 out of 5 by from Quiet on low speed/ a bit louder on higher speeds, but very acceptable I am using this fan as an exhaust fan on our 3-season porch (lots of sliding glass windows). It does the job of cooling the room down, at low speed, and has a quiet, soothing sort of sound. The higher speeds have not been necessary as of yet, but the sound levels of the higher speeds are louder (as expected) but not terribly obtrusive. I got this model (Weather Shield) because it can take some dampness from rain if it blows into the room before I have a chance to remove the fan from the window sill. The fan comes with 4 snap-on plastic stabilizer legs -- but I did not attach them because the sill that I am placing it on cannot handle those legs jutting out. A better design would be to have metal stabilizer legs that fold out from the bottom of the fan, so that you could position them as need be. So, I have deducted a star for this reason-- cheap, ineffective stabilizer legs that are not good for all situations. This is likely similar for all of these box fans made today. But, there is definitely room for this simple improvement to be applied to all these box fans.
Date published: 2016-10-24
Rated 5 out of 5 by from good fan I haven't used it too much as it is now cooling off but when I did use it, I was happy with the performance. Lasko is a good brand, I have had fans of this make in the past and they are still going strong.
Date published: 2016-09-21
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