Vornado creates cutting edge products - sowhen we set out to create a window fan, wedid our research and then rewrote theformula. The result was just over 6" tall,unobtrusive and clever enough to beseamlessly installed in windows from 24” upto 38" wide using an innovative modularblock system.Its electronically reversible chambersmoothly brings fresh air in or exhausts staleair out. Rain or shine, the weather-resistantcasing doesn’t mind. Either way, you’ll stillenjoy the view.