POWERFUL VORTEX ACTION Utilizes Vornado's signature Vortex air circulation to draw fresh air in from outside or exhaust stale air out of the room. ELECTRONICALLY REVERSIBLE With one button, quickly transition the airflow from fan to exhaust. Transom also automatically rotates into a closed position when the unit is powered off. SIMPLE INSTALLATION Transom seals off windows 26 to 40 wide with the patented Soft-fit foam block system that provides a snug fit without having to remove your screen. CUSTOMIZABLE COMFORT Choose from 4 speed settings with auto temperature control to maintain a set temperature. A remote control provides additional convenience. SUPERIOR SUPPORT When you choose a Vornado window fan, youre investing in superior performance and design that will deliver total satisfaction. If not, well replace it, for 5 years.