---
product_id: 104382782
title: "20\" Weather-Shield Performance Box Fan, 3-Speed (3720)"
brand: "lasko"
price: "AR$258231"
currency: ARS
in_stock: true
reviews_count: 9
url: https://www.desertcart.com.ar/products/104382782-20-weather-shield-performance-box-fan-3-speed-3720
store_origin: AR
region: Argentina
---

# Energy-efficient 20W motor Weather-Shield motor for window use 20-inch high airflow 20" Weather-Shield Performance Box Fan, 3-Speed (3720)

**Brand:** lasko
**Price:** AR$258231
**Availability:** ✅ In Stock

## Summary

> 🌬️ Stay cool, save smart, and breeze through your day with Lasko’s Weather-Shield box fan!

## Quick Answers

- **What is this?** 20" Weather-Shield Performance Box Fan, 3-Speed (3720) by lasko
- **How much does it cost?** AR$258231 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/104382782-20-weather-shield-performance-box-fan-3-speed-3720)

## 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

- • **Tool-Free Setup in Seconds:** Clip, stand, and go—no hassle, no delay, just instant cooling wherever you need it.
- • **Innovative Wind Ring System:** Boosts airflow by up to 30% without extra power—maximize comfort, minimize consumption.
- • **Save-Smart Energy Efficiency:** Runs under 2¢ per hour, keeping your wallet cool while you stay refreshed.
- • **Weather-Resistant Durability:** Patented Weather-Shield motor lets you leave it in your window worry-free, rain or shine.
- • **Whisper-Quiet 3-Speed Control:** Customize your breeze without the noise—perfect for focused work or restful sleep.

## Overview

The Lasko 20" Weather-Shield Performance Box Fan combines a powerful 20W motor with a patented weather-resistant design, delivering up to 30% more airflow at three whisper-quiet speeds. Energy-efficient and easy to assemble, it’s engineered for year-round indoor comfort with minimal operating cost.

## Description

This high-performing box fan from Lasko features a patented Weather-Shield motor for worry-free window use, plus a high performance grill for ultimate air flow. Three speeds and Save-Smart (costs less than 2¢ per hour to operate) make this an ideal fan for any room where you need to increase cooling airflow.

Review: Works without fail - I have this thing on 15 hours a day, in use for a CR box. It reliably runs at any speed.
Review: Terrible! - This fan fell apart immediately. The handle broke, it started rattling, and all three speed settings now move as slow as speed 1. It falls over easily even with the feet installed, but the feet broke on mine so it’s basically useless! This fan is an affront to the environment, your wallet, and the Lasko brand. Shame on the seller and shame on the company for making such a garbage product and pricing it so highly! This fan wouldn’t even be acceptable at 15 dollars!! When I requested a refund the seller said “the best I can do is give you 50% back”. Shame! Shame! Shame!! Update: I have continued to use it, and now it's SMOKING. This thing is a FIRE HAZARD!

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07NLJB35W |
| Batteries required | No |
| Best Sellers Rank | #2,238,203 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #562 in Floor Fans |
| Brand | Lasko |
| Color | Standard |
| Control Method | App |
| Customer Reviews | 3.8 3.8 out of 5 stars (160) |
| Diameter | 20 Inches |
| Efficiency | Energy-efficient, high-performing |
| Electric fan design | Window Fan |
| Finish Type | White or Cream |
| Finish types | White or Cream |
| Global Trade Identification Number | 00046013418807 |
| Indoor/Outdoor Usage | Indoor |
| Installation Type | Floor Mount, Window Mount, Wall Mount |
| Is Cordless? | No |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.25 pounds |
| Item model number | 3720 |
| Manufacturer | Lasko |
| Model Name | Lasko - 20" Weather-Shield Performance Box Fan, 3-Speed (3720) |
| Number of Blades | 5 |
| Number of Power Levels | 3 |
| Power Source | Corded Electric |
| Product Dimensions | 4.75"D x 21.25"W x 22.5"H |
| Recommended Uses For Product | Bedroom, Home |
| Room Type | Bedroom, Living Room |
| Special Feature | Energy Efficient |
| Specification Met | no |
| Style | Traditional |
| Switch Type | knob |
| UPC | 046013418807 |
| Wattage | 20 watts |

## Product Details

- **Brand:** Lasko
- **Color:** Standard
- **Electric fan design:** Window Fan
- **Mounting Type:** Floor Mount, Window Mount, Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 4.75"D x 21.25"W x 22.5"H
- **Recommended Uses For Product:** Bedroom, Home
- **Room Type:** Bedroom, Living Room
- **Special Feature:** Energy Efficient
- **Style:** Traditional

## Images

![20" Weather-Shield Performance Box Fan, 3-Speed (3720) - Image 1](https://m.media-amazon.com/images/I/81y6PL60EIL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works without fail
*by C***N on November 5, 2025*

I have this thing on 15 hours a day, in use for a CR box. It reliably runs at any speed.

### ⭐ Terrible!
*by A***S on July 12, 2022*

This fan fell apart immediately. The handle broke, it started rattling, and all three speed settings now move as slow as speed 1. It falls over easily even with the feet installed, but the feet broke on mine so it’s basically useless! This fan is an affront to the environment, your wallet, and the Lasko brand. Shame on the seller and shame on the company for making such a garbage product and pricing it so highly! This fan wouldn’t even be acceptable at 15 dollars!! When I requested a refund the seller said “the best I can do is give you 50% back”. Shame! Shame! Shame!! Update: I have continued to use it, and now it's SMOKING. This thing is a FIRE HAZARD!

### ⭐⭐⭐⭐⭐ Great quality fan for reasonable amount
*by T***Y on July 14, 2021*

I am partial to this brand and have had good luck with longevity of products. This fan is quieter than the older models and very efficient at moving air. Easy to use and quite sturdy. Would recommend this product as it is for the floor a window or on a shelf.

## Frequently Bought Together

- Lasko - 20" Weather-Shield Performance Box Fan, 3-Speed (3720)
- Lasko Wind Machine Air Circulator Floor Fan, 3 Speeds, Pivoting Head for Large Spaces, 20", 3300, White
- Genesis 20" Box Fan, 3 Settings, Max Cooling Technology, Carry Handle, Black (G20BOX-BLK)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-05-10*