[AIVC, Air infiltration and ventilation glossary, 1992]:air in which there are no known contaminates at harmful concentrations as determined by specialist authorities and with which a substantial majority (80 % or more) of the people exposed do not express dissatisfaction. … Continue reading →

[ISO 16814:2008, 3.2]air in an occupied space toward which a substantial majority of occupants express no dissatisfaction on the basis of odour and sensory irritation-NOTE Acceptable perceived IAQ is necessary, but not sufficient, to meet acceptable IAQ.