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Eragorn | Staff 18.7K Views
Aug 5, 2026 10:47 PM

3-Speed Lasko 20" Weather-Resistant Motor Box Fan (w/ 1710 CFM Airflow)

$20

$25

20% off
Walmart
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Deal Details
Walmart has 3-Speed Lasko 20" Weather-Resistant Motor Box Fan (White, B20200) on sale for $19.87. Shipping is free with Walmart+ (30-day trial for $1) or orders $35 or more. Otherwise, select store pickup where available.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter Eragorn for sharing this deal.

About this product:
  • 20" box fan with weather-resistant motor for safe window use
  • Moves up to 1,710 CFM airflow through bedrooms kitchens and offices
  • Three energy-efficient speeds for custom cooling comfort needs
  • Top-mounted controls allow quick speed adjustment without bending
  • Blue Plug fused safety technology cuts power on electrical faults

Editor's Notes

Written by jimmytx | Staff
  • About this Store:
    • Most items sold & shipped by Walmart.com can be returned for free, either to a store or by mail up to 90 Days after item is delivered. See the Walmart returns page for returns information.
  • Additional Information:
    • Rated 4.5 out of 5 stars at Walmart based on over 47.6k customer reviews.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Eragorn | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Walmart has 3-Speed Lasko 20" Weather-Resistant Motor Box Fan (White, B20200) on sale for $19.87. Shipping is free with Walmart+ (30-day trial for $1) or orders $35 or more. Otherwise, select store pickup where available.
  • Note: Availability for pickup may vary by location.
Thanks to Deal Hunter Eragorn for sharing this deal.

About this product:
  • 20" box fan with weather-resistant motor for safe window use
  • Moves up to 1,710 CFM airflow through bedrooms kitchens and offices
  • Three energy-efficient speeds for custom cooling comfort needs
  • Top-mounted controls allow quick speed adjustment without bending
  • Blue Plug fused safety technology cuts power on electrical faults

Editor's Notes

Written by jimmytx | Staff
  • About this Store:
    • Most items sold & shipped by Walmart.com can be returned for free, either to a store or by mail up to 90 Days after item is delivered. See the Walmart returns page for returns information.
  • Additional Information:
    • Rated 4.5 out of 5 stars at Walmart based on over 47.6k customer reviews.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Eragorn | Staff

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51 Comments

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Aug 6, 2026 4:33 PM
1K Comments
Joined Aug 2022
MidnightGamerAug 6, 2026 4:33 PM
1K Comments
Quote from TACO_Trader View quoted comment :
Don't forget to add a filter. Merv 3
I've never consider putting a filter on a fan. Thanks for the idea!
Aug 6, 2026 5:58 PM
7.6K Comments
Joined Aug 2007

This comment has been rated as unhelpful by Slickdeals users.

Aug 6, 2026 7:24 PM
64 Comments
Joined Nov 2022
CalmKnob568Aug 6, 2026 7:24 PM
64 Comments
Perfect for Alton Browns beef jerky and dried fruit. Merve 3 filters and a bunge cord.
Aug 6, 2026 7:37 PM
4.2K Comments
Joined Mar 2005
bullgatesAug 6, 2026 7:37 PM
4.2K Comments
Quote from lotsalotsadeals View quoted comment :



Still just moving air.

In order to provide cooling would have to do it regardless of temperature.

So right now in my house with AC on its 75 here in FL.
Outside its 86 - I should open windows and put on fan to cool my house even more?
Absolutely if you want to be uncomfortable. And in many places the night time air is much cooler (but more humid )than daytime temps so people can usually bring down inside temps.

Does a fan cool? no not really but it can bring a cooling effect to the body when sweat is present. In a house it can move hotter air from objects may have absorbed heat and bring cooler air from outside to pass over objects that will help remove heat from the objects.

It would seem that you know this and are just being snarky?
Aug 6, 2026 8:28 PM
210 Comments
Joined Mar 2005
ToronadoXPAug 6, 2026 8:28 PM
210 Comments
These move lots of air and are great for the garage too.
Aug 6, 2026 8:34 PM
706 Comments
Joined Aug 2014
MikeyJohnAug 6, 2026 8:34 PM
706 Comments
Quote from incarnate View quoted comment :
Where in the world are you using these fans that you destroyed 4 of them in a month?
I'm using them as fans in the windows. They are held in place by closing the window down on them or to the side of them.
Aug 7, 2026 1:25 AM
1K Comments
Joined Aug 2022
MidnightGamerAug 7, 2026 1:25 AM
1K Comments
Quote from lotsalotsadeals View quoted comment :
Still just moving air.

In order to provide cooling would have to do it regardless of temperature.

So right now in my house with AC on its 75 here in FL.
Outside its 86 - I should open windows and put on fan to cool my house even more?
A/C is always better way to cool the house, but in afternoon or evening, I've been able to make the 1st floor cool enough to not need to turn my A/C.

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Aug 7, 2026 1:40 AM
64 Comments
Joined Nov 2022
CalmKnob568Aug 7, 2026 1:40 AM
64 Comments
Quote from lotsalotsadeals View quoted comment :
These (and all fans) have ZERO cooling capability. All they do is move air around.
Or, just maybe, when it is cooler in the evening, maybe it moves hot air outside causing a negative pressure to draw the cooler air in for another window.... Maybe...
Aug 7, 2026 3:00 PM
168 Comments
Joined Sep 2019
infamouscrunchyAug 7, 2026 3:00 PM
168 Comments
Quote from TACO_Trader View quoted comment :
Don't forget to add a filter. Merv 3
Just picked up this same fan about a week ago at Home Depot for the same price. Added 3x MERV 8 filters for $14 and 3D printed 4 brackets to hold a filter to the fan. Adding some cardboard and using it for a powder coating spray booth (vs the $120 Eastwood wanted for the same thing...with only 1 filter...and they make you supply your own fan)!
Pro
Aug 7, 2026 3:11 PM
2.9K Comments
Joined Nov 2010
TACO_Trader
Pro
Aug 7, 2026 3:11 PM
2.9K Comments
Quote from infamouscrunchy View quoted comment :
Just picked up this same fan about a week ago at Home Depot for the same price. Added 3x MERV 8 filters for $14 and 3D printed 4 brackets to hold a filter to the fan. Adding some cardboard and using it for a powder coating spray booth (vs the $120 Eastwood wanted for the same thing...with only 1 filter...and they make you supply your own fan)!
Adapt improvise and overcome. Just out of curiosity. What do you estimate the printed brackets cost.
Pro
Expert
This user is an Expert in Home & Home Improvement
Aug 7, 2026 5:25 PM
33.9K Comments
Joined Jul 2006
SUCHaDEALAug 7, 2026 5:25 PM
Pro
Expert
This user is an Expert in Home & Home Improvement
33.9K Comments
Aug 7, 2026 8:03 PM
1K Comments
Joined Jul 2005
psuvetteAug 7, 2026 8:03 PM
1K Comments
Quote from vid1900 View quoted comment :
Here is a guy who did a shootout with a dozen 20" box fans, including airspeed and power consumption :https://www.amazon.com/review/R3F...XINOM1RIB3
That was awesome. My biggest gripes with the box fans I have is that they're too loud even on the lowest setting or don't have a handle.
Last edited by psuvette August 7, 2026 at 01:06 PM.
Pro
Aug 7, 2026 8:30 PM
629 Comments
Joined Jul 2010
thethingx
Pro
Aug 7, 2026 8:30 PM
629 Comments
Quote from tiiimdotcom View quoted comment :
I bought one of these years ago. It's had a wobble since day 1. It walks itself across the floor. If I say anything more, I know I'll get downvoted.
but I kinda want to see a video of this happening...
does it only do this on hard floors or carpet too?
Aug 7, 2026 9:12 PM
22 Comments
Joined Feb 2016
mesteneroAug 7, 2026 9:12 PM
22 Comments
Quote from MikeyJohn View quoted comment :
This is total bs. I purchased 4 of these a month ago from Walmart. All brand new. They each have fallen over once. Each fan broke in various ways. One of them one blade completely came off as a result of it just tipping over onto a rug. The other 3 all run considerably slower than they did for the first week. Others when fell onto the ground shattered the edge frame which broke away. Another one the speed control dial completely came away from the housing. The last description I would label for these fans is un-killable. Instead they are some of the most fragile household products I have ever owned.
I am convinced that Lasko has an army of paid folks out there…..
Theres no way, i have two lasko fans, one fall to grown all the time because its sits on a rickety desk, and besides the feet nothing has broken its been like 10 years.
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Aug 8, 2026 7:18 AM
706 Comments
Joined Aug 2014
MikeyJohnAug 8, 2026 7:18 AM
706 Comments
Quote from mestenero View quoted comment :
Theres no way, i have two lasko fans, one fall to grown all the time because its sits on a rickety desk, and besides the feet nothing has broken its been like 10 years.
But you clearly have the older generation models that established the reputation reported. You said it has been 10 years for you. How about you buy a new one now and let us know how it's working after one fall.

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