This is the only relatively honest article I've seen about this cooling device. It's really suitable only in very dry climates such as AZ. The same concept is used there for whole house "swamp coolers ". People do not understand how this works. You do NOT want it in humid climates. The best it can do in that case is to create a cool, DAMP environment.

This exact unit is sold by like, 1,000 identical Chinese 'companies'...

"3.5-hour lifetime" :D

Perhaps I lack imagination but who exactly wants to humidify air in the summer (which is when most people want cooling)? People living in a desert? You probably want the exact opposite. Not to mention that air naturally becomes more relatively humid as temperature goes down. Actually, dehumidification makes up a large chunk of energy consumption of an air-conditioner as water vapour undergoes a phase-change.