A WARNING ON PORTABLE ROOM AIR CONDITIONERS

At work, we have one in a hot server room that does not have an as built a/c duct.

Runs 24/7/365.....for 5 years.

Does just fine.

Not sure of the brand but I'd buy one.

Sure if you don't vent the hot exhaust properly it will not work.

...and cheapos, which were just about all you could find a few years ago, are gonna be trouble.