The compact, eco-friendly Arctic Air device utilizes Hydro-Chill evaporative cooling technology to draw in hot air and pass it through a wet filter, which then exits the other side as cool, refreshing, dehumidified air. The website indicates that all you have to do is add water to the ml reservoir and press the button, and the device will quickly and efficiently cool any personal space in your home for as long as eight hours. Its whisper-quiet two-speed fan with programmable digital thermostat—which can be adjusted using the bright, easy-to-read display—is said to give you precise control over your climate, and the nightlight can provide soothing comfort. Furthermore, does it have any competition? And if so, how can you make a more informed decision about which might be the most appropriate option? Evaporative cooling is pretty much what it sounds like.