EDIT: several commenters seem to think that I’m claiming this air conditioner does not work at all, so I want to clarify that it will still cool down a room on net. The point is not that it doesn’t work at all. The point is that it’s stupidly inefficient in a way which I do not think consumers would plausibly choose over the relatively-low cost of a second hose if they recognized the problems.
Just added this clarification to the post: