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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Nov 12
At a glance
- Condition
- New
- Dimensions
- 4.25"D x 20.5"W x 21.75"H
- Weight
- 3.2 lb
- Color
- White
- Material
- Plastic
- Electric fan design
- Window Fan
- Power Source
- Corded Electric
- In the box
- Cord
- Warranty
- Warrranty
Features 5
- Built-in carry handle Save-Smart
- less than 2 per hour to operate
- 2-year limited warranty
- 3 quiet speeds
- The Blue Plug Patented safety fuse technology
Specs 41
| Brand | Lasko |
|---|---|
| Color | White |
| Electric fan design | Window Fan |
| Power Source | Corded Electric |
| Style | Classic |
| Product Dimensions | 4.25"D x 20.5"W x 21.75"H |
| Room Type | Bedroom |
| Special Feature | Lightweight |
| Recommended Uses For Product | Indoor |
| Mounting Type | Window Mount |
| Special Features | Lightweight |
| Controller Type | Manual controls |
| Number of Speeds | 3 |
| Wattage | 70 watts |
| Number of Blades | 5 |
| Speed | 3 rpm |
| Voltage | 70 volts |
| Switch Type | Push Button |
| Indoor Outdoor Usage | Indoor |
| Control Method | App |
| Number of Power Levels | 3 |
| Main Power Connector Type | NEMA 5-15 |
| Installation Type | Window Mount |
| Material | Plastic |
| Blade Material | Plastic |
| Specification Met | ETL |
| Finish Type | Painted |
| Collection Name | Indoor Fans |
| Item Dimensions D x W x H | 4.25"D x 20.5"W x 21.75"H |
| Blade Length | 20 inches |
| Item Weight | 3.2 pounds |
| Size | No Size |
| Brand Name | Lasko |
| Model Name | Air Circulating Box Fan |
| Model Number | 3733 |
| Manufacturer | Lasko Products |
| UPC | 046013311900 012304161165 |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Item Type Name | 20 INCH BOX FAN |
| Part Number | 3733 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Loyal to Lasko
I only buy Lasko fans b/c they're often one of the most affordable options and they ALWAYS work great. I've never been disappointed by a Lasko fan! We run them everyday (often on max speed) and they'll last from roughly 2 to 6 years, depending on how much they get abused.
Reviewed in the United States on September 1, 2026 by Tom Cline
strong airflow at a suprising price!
Powerful, strong airflow at a suprising price!
Reviewed in the United States on August 13, 2026 by Zhaobang Hou
This fan works multipurpose as a exhaust in your windowif you have a small apartment
The fan is not noisy but it is a fan so you will hear it blowing it is lightweight and sturdy I bought this fan in October 2021 and it hasn't been a whole year yet we are now in the end of June 2022 and it still works fine. It also is easy to clean you just remove the screws from the screen and get a scrub brush with soap and water or some type of multi-purpose cleaner and the dirt comes off easily the fan blades itself white clean easily I don't recommend trying to remove the fan blades from the mechanism just wipe the blades off and then that should be good enough and then replace the screens with the screws and you'll have clean fresh air instead of doing a lot of dust that is a great product and I'm happy that I invested in it and it saves money too. It sits easily in a window if you have an apartment like me and a small apartment at that and you're cooking definitely helps as exhaust as well
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Reviewed in the United States on June 22, 2022 by Jujulimitless
Window fan
Used in window to cool off apartment. It worked well it was a little noisy and difficult to clean, but it served the purpose of moving the air around the apartment if you’re in a pinch and you don’t have air-conditioning.
Reviewed in the United States on August 12, 2025 by Kris Morelli
A good buy is more than just the money up front.
While it's somewhat smaller and lighter than their previous box fans, it works very well and has more power than Lasko's previous box fan models ... so much that the rear "feet" need silicone grippers, or the suction skates it backwards. It comes in a Home Depot box, so why not buy direct? Here's why: the third-party seller gets it to you super fast (instead of the usual 3 - 4 wks. a direct order would take for delivery). Secondly, Amazon offers insurance on their appliance sales, and this is so important even for box fans. About 8 yrs. ago, I bought nine (9) large multifunctional fans, which are easily twice as expensive as box fans. Six of them were gifts, and I kept the other three. Eight of these fans died in under two years, five of them dying in the very first year! The ninth one that lived was one of mine and it lived about 8 yrs. All of these purchases were uninsured, so I was both out of pocket and humiliated by malfunctioning gifts. A one out of nine survival rate is a very poor ratio and hardly recommends a purchase, but when they work, their fans are really great (and their box fans usually work well). So you see, insurance is a vital necessity now. You can't protect your purchases without it.
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Reviewed in the United States on March 16, 2022 by KC Myers
No noise or vibration.
Have a room in our beach house that a ceiling fan cannot be installed in. Bought this fan and put it on the floor and it is better than a ceiling fan. Great price. Not noisy. Doesn't vibrate Great fan and a great price. Out of the box. Plug it in and you are good to go. We now have 3 of these fans and no problems with any of them.
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Reviewed in the United States on September 9, 2018 by Phyllis E.
I'm a big fan of fans
Other than 480V 3 phase 50 HP ones, right down the street on Lincoln St in West Chester is Lasko. I had my first 20 inch box fan for 19 years. I'd use it for summers and put it away. Then I used it all year long with a 20X20X2 inch filter on a timer from 4am to 8pm. I did a blow out the motor and reoil twice a year. Yes folks. I know HVAC. One day it (the motor) gave up the farm. No smoke. No fire. No smell. I'm waiting for Amazon to ship me the new version. Guaranteed gang. $31bucks. This moves the air without the expensive remote controlled crap. Satellite says: Buy it once.....buy it for life, *
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Reviewed in the United States on July 21, 2021 by Steve Johnson
Still Going
I’ve Had This Thing For Like 3 Years… still going strong. Valuable. Use it every night. Clean with warm wash cloth and swiffer duster once it’s turned off. Love it. It’s great.
Reviewed in the United States on October 16, 2024 by Nicole M. Sholl