- Description
- Specifications
20-Inch Premium Box Fan with Weather-Shield Design for Indoor and Window Use in Wet Conditions
The Lasko 3720 is a 20-inch premium box fan with Weather-Shield construction that resists moisture damage when placed in open windows during rain. Three speed settings provide adjustable airflow for cooling, ventilation, and white noise. Designed for residential, commercial, and job site environments where window ventilation operates year-round regardless of weather conditions.
Front and rear grills for full airflow coverage. UL Listed for safety. White finish.
Where the Lasko 3720 Fits
- Window installations where the fan stays in place through rain and humidity where the Weather-Shield design protects internal components from moisture that would damage a standard box fan
- Workshops, garages, and job sites that need continuous ventilation regardless of outdoor weather where the rain-resistant construction keeps the fan running in open windows and doorways without risk of water damage
- Bedrooms and living spaces that use a window fan year-round for airflow and white noise where three speed settings provide flexibility from gentle circulation to high-volume air movement
What the Lasko 3720 Delivers
- Weather-Shield Design: Moisture-resistant construction for safe operation in open windows during rain. 20-inch fan diameter.
- 3-Speed Control: Low, medium, and high settings for adjustable airflow. Front and rear grills for full coverage.
- Premium Construction: Built for extended use in residential and commercial environments. UL Listed.
- Window and Floor Use: Standard 20-inch box fan form factor. White finish. 21.5 inches tall.
