We test three sizes of window ACs—small, medium, and large—and adjust the size of the chamber based on the room size each air conditioner is designed to keep cool. We crank the temperature in ...

By Allen St. John When summer approaches, a window air conditioner ... or large—each air conditioner is designed to keep cool. We crank the temperature in the chamber up to 90° F, then measure ...

Inverter air conditioners promise greater efficiency and quieter operation. Consumer Reports explains the technology and why ...