I've seen some companies use these smaller portable AC units for cooling small server rooms or IDF's. I can't really comment on the BTU issues, but if a company wants to utilize them I would try and make sure they understand the additional risk; They have de-humidifiers in them that don't drain anywhere but an internal holding tank. I've seen one leak water all over the floor of a small server room. Duty Cycle; Portable consumer grade AC units aren't really meant to run 24/7, I wouldn't expect one to run for 5 years non stop. (The one we had running in an IDF failed after 2 years.) They also lack any sort of environmental monitoring that the purpose built units have, so if a AC unit fails you won't know. You could re mediate that with some environmental monitoring sensors or appliances but that costs $$$.