"A fan that makes rooms wetter, deceptively marketed as an air conditioner."
The 'Windowless Portable Air Conditioner' title is a marketing fiction. This is an evaporative cooler that blows air over a wet medium. It uses water evaporation to feel cool, which only works in dry environments and actively increases room humidity.
This is for someone in a very dry, arid climate (e.g., Arizona, Nevada) who cannot install a window or portable AC and understands this device works by increasing humidity. It offers a slight cooling sensation at very low power consumption, provided the ambient humidity is low.
Anyone living in a region with moderate or high summer humidity should avoid this. It will simply make the room feel clammier and more uncomfortable. Buyers who need to actually reduce a room's temperature and humidity must purchase a real portable AC with an exhaust hose.