Bionaire Window Fan with Reversible Airflow Blades delivers powerful, customizable cooling for your home. Engineered for comfort and convenience, this versatile fan features multi-functional blades that can be set to intake fresh air, exhaust warm air, or exchange airflow simultaneously, giving you total flexibility for your home environment. With three speed settings—low, medium, and high—you can personalize the airflow to your preference. The programmable thermostat allows the fan to turn on or off automatically based on your selected room temperature, while the LED display with dimmer function makes it easy to monitor temperature at a glance, even at night. Designed to fit most double hung, vertical slider, and casement windows, the fan includes a built-in accordion extender panel plus an additional extender, providing a snug and secure fit for window openings ranging from 24" to 36". Installation is fast and frustration-free—no assembly required. Operate the fan from across the room using the included remote control for added convenience. ETL certified for safety and backed by a 3-year limited warranty, the Bionaire Window Fan is a smart, reliable solution for enhancing airflow and maintaining comfort in any room.