---
product_id: 1183988
title: "Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720"
brand: "lasko"
price: "฿7478"
currency: THB
in_stock: true
reviews_count: 4
url: https://www.desertcart.co.th/products/1183988-lasko-weather-shield-performance-box-fan-3-speeds-innovative-wind
store_origin: TH
region: Thailand
---

# under $0.02/hr energy cost 30% more airflow 3 ultra-quiet speeds Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720

**Brand:** lasko
**Price:** ฿7478
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game—cool smarter, not harder!

## Quick Answers

- **What is this?** Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720 by lasko
- **How much does it cost?** ฿7478 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/1183988-lasko-weather-shield-performance-box-fan-3-speeds-innovative-wind)

## Best For

- lasko enthusiasts

## Why This Product

- Trusted lasko brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Savings:** Runs for less than 2 cents an hour, making year-round comfort budget-friendly
- • **Breeze Like a Pro:** 3 whisper-quiet speeds perfect for focused work or restful sleep
- • **Plug & Play Comfort:** No-tools assembly means instant refreshment—set up in seconds, no hassle
- • **Power Meets Efficiency:** Innovative Wind Ring System boosts airflow by 30% without extra energy use
- • **Weather-Ready Durability:** Weather Shield Motor lets you keep cool even with an open window in light rain

## Overview

The LaskoWeather-Shield Performance Box Fan features a 20-inch blade with an innovative Wind Ring System that delivers up to 30% more airflow while consuming minimal energy (under $0.02/hr). Its Weather Shield Motor allows safe use near open windows during light rain, and the fan operates quietly on three adjustable speeds. Designed for quick, tool-free assembly and portability with a built-in carry handle, it’s ideal for bedrooms, offices, and homes seeking efficient, reliable cooling.

## Description

Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720

## Features

- 3 Quiet Speeds - makes this fan ideal for the bedroom, living room, kitchen, or home office. The quiet yet powerful motor provides a cooling breeze throughout the room.
- Save-Smart - means you'll pay less than $0.02 per hour to operate the fan. Combine this with up to 30% more air velocity and you have an energy efficient fan to use year round.
- Weather Shield Motor - allows you to use the fan worry free in an open window. Thanks to the weather shield motor you can leave the fan in place during minor rain.
- Innovative Wind Ring System - is designed to increase air velocity without increasing power consumption. This allows the fan to circulate more air compared to traditional fans.
- Simple No-Tools Assembly - allows you to take the fan out of the box and have it working in seconds. Just clip the stabilizing feet onto the fan, stand up the fan, and it's ready to use.

## Product Details

- **Brand:** Lasko
- **Color:** 3720
- **Electric fan design:** Floor Fan
- **Power Source:** Corded Electric
- **Style:** Modern
- **Product Dimensions:** 4.7"D x 21.2"W x 22.5"H
- **Room Type:** Bedroom, Dorm Room, Home Office, Living Room
- **Special Feature:** 3 Speeds, Save-smart technology, Weather shield motor
- **Recommended Uses For Product:** Air Circulation, Cooling
- **Mounting Type:** Stand Alone

## Images

![Lasko Weather-Shield Performance Box Fan, 3 Speeds, Innovative Wind Ring System for Up to 30% More Air, Carry Handle for Bedroom, Office, Home, 20 Inch, White, 3720 - Image 1](https://m.media-amazon.com/images/I/71kzO3PsS9L.jpg)

## Available Options

This product comes in different **Number of Items** options.

## Questions & Answers

**Q: What is the cubic ft of air movement for the fan?**
A: Great question. The approximate CFMs of this unit are as follows -1530/LOW  1920/MED  2220/HIGH

**Q: how many watts does this fan draw?**
A: My watt meter is reading: Watts = 69/Low, 86/Med, 100/High.

**Q: Where does the cable connect on the fan?**
A: back at bottm comes from moter down fram and out nice long cable best fan i ever had i have 2 both run 12 t0 24 hrs a day and have for almost 2 yrs  you will love them they make very very little sound too and great air flow buy buy hope this helps you

**Q: I see it says made in the u.s.a. and in the next section it says made in china. well, which is it?**
A: The description says made in usa with parts from USA and China.

## Customer Reviews

### ⭐⭐⭐⭐⭐ lasko box fan
*by C***S on May 12, 2025*

my old lasko after 20 + yr gave out tried to return would not take back (lol just kidding) new fan super great defiantly low noise and puts out pjunty of air for me only draw back cord much shorter easy fix with quality short extension cord.but be nice if they did not skimp on the power cord other then that happy!! it a good box fan hopefully last like the last one.

### ⭐⭐⭐⭐⭐ These fans are worth every penny
*by F***X on April 5, 2025*

These box fans are excellent! I bought these to replace the two Lasko 3720 box fans that I bought back in 2008. They are quite and are extremely powerful. The best part is there is no having to assemble these you just put the feet on, plug it in and turn it on and it only cost 2 cents an hour to run talk about energy efficiency! These Lasko box fans are incredibly durable. I do not put ether of mine in the windows, so I don't know how they perform in that configuration probably pretty well given how durable and powerful they are. This is the box fan you want to buy! I promise you won't regret it.

### ⭐ Fans are poor quality, off centered blades create extreme noise
*by M***R on August 28, 2023*

The fan brand quality and design are both poor. This creates wobble vibrations, unstable fan balance even with feet design, sharp edges, and "weather shield" appears to be upon out-blowing air formation only, there is no back engine "weather shielding" visible on inspection item.I should have returned it immediately, but it was very hot here, so my family did try to make due. The noise became truly unbearable with loud clacking sounds each time the off-kiltered blades hit the metal backing. Little pieces of plastic began to fly and the item was damaged. When we went to pick it up to inspect it, there are loose pieces of metal around he screw areas and other places of the aluminum on these that cut into my fingers.When it happened to just one initially I thought it was just the one faulty unit and set it aside for a project. then the second began to create noise as well. Upon inspection, it appears that the wobbly is unfixable, because the inside of the rotational area houses a "weather shielded" fan blade assembly, that has no track. this means it is easily falling off center without any rigid design to hold it in place.Not only is this disappointing but I also waited too long to return them. I would strongly recommend another type of fan. This was purchased because the quality of Lasko fans used to be remarkable a few years ago. However, the way the internal blade piece is attached now will always stretch and cause the wobble problems that cause that noise. I am not sure it will always be this noisy, and one of them functioned properly for 1 month. This is not a bearings-issue noise but the internal blades are not stable so they hit the metal supports in the back. It seems that the design could have benefitted from a circular back or indeed true weather-shielding to the back of the blade assembly as well. It is not a good design.The level of noise is deafening and disturbing to the family. It is extremely loud "clacking" when it hits and the speed causes the blades to damage. This means the unit is unusable- both of them.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-11*