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 ...

At Consumer Reports, we test room air conditioners in a special climate-controlled chamber in our labs in Yonkers, N.Y. We adjust the size of the chamber based on the space—small, medium ...

Consumer Reports' tests have found that these heavy units are iffy at cooling—and hardly portable Portable air conditioners can be loud and unwieldy, and they work harder to cool a room ...