Description

Ventilation requirements have been derived primarily from  those for odor control and secondarily from criteria for concentrations of air  contaminants.

The study reported here looked at criteria for both odor and  physical acceptability and paid particular attention to the differences between  smoking and nonsmoking occupancy in an environmental  chamber.

The results implied that, under nonsmoking conditions and with  moderate humidity, between 5 and 10 cfm (2 .5 and 5 L/s^-1) of fresh  air per occupant should satisfy 75% of visitors, but that, under smoking conditions,  many times as much fresh air is needed for both odor acceptability and  compliance with customary criteria values for smoke