QEHSHealth
Indoor Air QualityIAQ
The quality of air inside buildings affecting occupant health and comfort.
IAQ concerns: CO2 (indicator of ventilation adequacy; ASHRAE 62.1 targets <1,000 ppm), VOCs, particulates, biological contaminants (mould, Legionella, allergens), and radon. OSHA has no comprehensive IAQ standard but enforces under the General Duty Clause. NIOSH IAQ investigations are a frequent response to "sick building" complaints.