The window openings are smaller than the wall but I do not know the exact measurements. That wall is 14’ 8” long so width of the window is a little less. Many students get what is called a Tower Fan. These are tall, rotating fans that take up very little room but are very effective. They can be found at major retailers, Bed Bath and Beyond, Target and Walmart. In addition many tower fans come with remote controls for easy access to switching speed, position, etc.