Humidifier

Most so-called portable air conditioners stretch the definition of "portable," but the Evapolar isn't one of them. In a form factor about the same size and weight as a small toaster, the unit packs an evaporative cooling system​ to cool, humidify and purify the air.

Dyson, a company best known for its line of high-end vacuum cleaners, has just announced a new humidifier that's designed to kill bacteria in the air using what it calls "Ultraviolet Cleanse" technology.