Summer is here and temperatures are rising across the Northern Hemisphere, where nearly 90 percent of the world’s people live. The heat is pushing people to rely on air conditioners to stay ...

No central AC? As the National Weather Service warns of dangerous heat across much of the US next week, we tested dozens of air conditioner units to see which delivers the best cooling performance.

The way portable and window AC units operate is the most significant factor that determines their cooling capabilities. The Windmill was the top-performing window AC unit in our tests, while the Black ...