Health and ventilation
Early health concerns when Egyptians noted health of pyramid stonecutters improved with ventilation.
First ventilation standard
First ventilation standard in 1631 where King Charles of England decreed that there must be ventilation. Also stating that ceiling at least 10 feet high, windows taller than they are wide, and it is all for health and safety.
First ventilation rate is documented to be 2 l/s/p or (4 cfm/p) in 1834 for British MPs.
Source: presentation on “Smart Ventilation” by Max Sherman from University of Nottingham.