The difference between a good air conditioner and a great one isn’t just how quickly it cools a room—but also how quietly it does so. On a hot, still summer night, a quiet air conditioner may be the ...

These ACs from Frigidaire, GE, LG, and Midea can keep things cool and quiet while you sleep U-shaped air conditioners like this Midea can run quieter because they use your window to block out noise.

Sure, a quiet air conditioner is nice during the day, but it’s essential at night when you’re trying to sleep. That’s why, in addition to testing how well air conditioners cool a room, we also rate ...