These high-powered, energy-efficient window air conditioner units are perfect for cooling your room in no time. Laboratory Technical Project Manager Gianmarco Chumbe has been part of the CNET Home ...

Portable air conditioners account for almost 20 percent of the room air conditioner market, but our lab tests reveal that they deliver only mediocre performance. In fact, not a single model earns ...

Our best budget portable air conditioner is designed for rooms up to 250 square feet but cooled the 550-square-foot testing room by more than 2 degrees in the two-hour testing period. That's ...