Window AC units can cool the rooms where you spend ... Best window air conditioner: Midea U-shaped air conditioner (12,000 BTU) If you're looking to cool a space smaller than 550 square feet ...

Inverted U-shaped models drape over the window sill ... Part of finding an air conditioner with a tolerable noise level is choosing a unit that’s designed for your room size.

So our first and best advice is to buy a window unit, which can be both cheaper and more effective at cooling a room. In our portable air conditioner tests, we measure how long it takes a unit to ...