I too have used it 0 as a professional. I don't use the calculations per se, but as an example of where it's useful, I just had work done on my heat pump. I understand how the system works and was able to tell the tech what was wrong so he could fix it.
I enjoyed it a little bit. Learning how some of the stuff (ideally) works was generally interesting. What all do you guys do and how much stuff that I learn will I actually use? I've been told that it's <10% depending on the field I go into.
Right now I'm working @ KUB, so I think I might have a position lined up there for when I graduate in a year.
