Cool Colors: Transform Your Space with the Lasko Cool Colors 20” Slim Box Fan – Bringing Coolness, Comfort, and color into your space! Moves a Large Volume of Air: Experience ultimate comfort and productivity by achieving an impressive 1,725 CFM airflow! Safe for Window Use: Durable weather-resistant motor ensuring hassle-free window operation. Built to Last: Engineered with a robust steel frame and thoughtfully designed with safe, rounded corners. Energy Efficient: Take full control of your comfort with 3 energy-efficient speed settings: Using Top-mounted manual controls, easily adjust air circulation and flow to perfectly suit your cooling experience, all with a turn of a knob! Wind Ring® System: Our cutting-edge WingRing® system delivers a remarkable 44 ft/min increase in air velocity, surpassing Lasko’s B20200 box fan model. Highly Portable: Easy to carry anywhere, instantly providing cool comfort where you need it – perfect for large living areas like bedrooms, family rooms, offices, or on the go! Safe to Use: The Blue Plug™: Trusted Safety Fuse Technology is a trusted safety device that utilizes an integrated fuse to provide protection against electrical faults. Maximize Your Cooling Power: Use this box fan in conjunction with an air conditioner for enhanced airflow and ultimate comfort.