Warning: This is not actually a modeling question, but I'm guessing some of you have addressed it as part of your modeling efforts
Also called "man fans" in some of the manufacturing spaces I've visited over the years. They are propeller fans, approximately 18-30 inches in diameter, and the people on whom they blow air will kill you if you even think of removing them (or file a union grievance).
Generally there are a lot of them and they may have up to 1/2 HP motors. We would like to propose a more efficient alternative (so we're not lynched). If you have any suggestions, please let me know. Thanks!
p.s., I have not quite absorbed the protocol for this site. If the questions is not appropriate, I apologize and ask that you send a private message to jim@buildingperformanceteam.com.