The best portable air conditioners keep rooms cool and offer a degree of air filtration. We test for cooling ability, noise, ...

This isn't an all-weather, cold-climate heat pump -- it can operate in temperatures ranging from 50 to 104 degrees Fahrenheit ...

Our experts say these portable AC units from brands like DeLonghi and Honeywell are worth buying. They're movable and keep ...

They also aren't hugely energy-efficient, but the reality is they're a good cooling option if: you can't install air conditioning because you rent ... Check our pedestal and tower fan reviews to see ...

The most common and more efficient way is to use a cooling tower, with a recent video by [Practical Engineering] explaining the physics behind these. For the demonstration, a miniature natural ...