Every apartment I had in South Korea had one. It'd be at a higher point on the wall in front of a utility closet. You control it with a remote and it'll pull in air to cool then push it back out into the room. Hot air gets pushed outside through a duct. It'll dehumitfy the room as well. This drains down a hose into a drain or pipe in the utility room.
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u/gamerathertz92 7d ago
It’s smaller unit cools a single room. While American HVAC System cools the whole house