I had a portable ac, which is what I think you're talking about, Fran. The one in this pic looks similar to the one I had. They work just as well as the window ac. The one I had, had a remote control to go with it. It still needs some kind of opening for the tube thingy

, and, on the back bottom, there's an opening for a piece of tubing that will lead somewhere to be drained.
ETA...they are more expensive than window ac's though. I had it for my very humid basement, while my son was still living here.