Yesterday I sent a mail to our groups mailing list, stating that after 11 hours sitting in a loud environment and breathing dried air I reached my limit and will go home now (actually, the main message was something else...)

Today I got a response (CCed to the group list) from one of my bosses: when he was doing actual work, 11 hours was his average spent in the same hall, and he could be there much longer. Well. SOD OFF! I am feeling motivated, valued etc now.