Air Conditioning is considered a complicated matter. Not that it is so mathematically, but measurements, except for the general notion of “hot”, “hotter”, “cold” and “colder” are rather complicated, and require tools which are not common with the maintainers of server rooms. We trust flow diagrams, and air flow schema, however, the outcome should be a colder server room, and with some luck, with some less expenses on electricity.
I have recently seen such a creative solution in a company I have visited. The A/C solution suggested by the external experts the company has hired were overpriced and complicated, while the company needed a temporary solution for several months, especially the (hot Israeli) summer time.
I laughed my stomach out when I have seen the creative solution used in that particular server room. I felt as if I was taken back to the sci-fi B-movies of the 70s, however, the solution works, and is rather effective…
Bottom line – it works. That is almost all that matters.