The White Shirt Man (WSM) is probably Lovelad
1.The 6th floor = more heat gain rising to the upper floor and sun radiation penetrating roof reaching 6th floor.
2.Many more human bodies generating 300 BTU/hr/person= more heat gain
3.Sun streaming in where the white shirt man is standing = more hear gain
4. Anxiety and climbing staircase =faster heart rate = more heat gain
Therefore it’s not unreasonable to suggest that WSM is Lovelady who removed his flannel shirt due to the heat gain causing ambient temperature to be above the average 72-76 degree comfort zone.
And then all the other reasons Mr.Ford has adequately listed. 👍