The A/C in an apartment I was living in in Texas failed one summer, and the management firm put one like that in my bedroom temporarily. Noisy and inefficient

The A/C in an apartment I was living in in Texas failed one summer, and the management firm put one like that in my bedroom temporarily. Noisy and inefficient is a good description. Granted, it had to run off a regular 15A outlet so it was never going to be as powerful as the one in the attic. But it made sleeping possible by getting the temperature below 85F (30C).