These window air conditioners are made for 250- to 350-square-foot rooms ... We test three sizes of window ACs—small, medium, and large—and adjust the size of the chamber based on the room ...

Luckily, pretty much all the big air conditioner ... This is a window unit that cools 350 square foot rooms, which might mean a medium-sized bedroom or small living room. It stands 12.36 inches ...