GUIDES
Evidence-led guidance on particles, airborne microorganisms, VOCs, CO₂, and practical indoor air quality management.
01 · GUIDE
School indoor air quality should be assessed across ventilation, occupancy density, particles, airborne microorganisms, VOCs, and odors—not CO₂ alone. Ventilation remains fundamental; air-treatment equipment should be considered as a complement to the space’s management goals.
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Assess an air purifier or air sterilizer by its target pollutants and the test method and conditions, not by its name alone. Air-cleaning performance addresses particles such as PM10 and PM2.5, harmful gases, and odors, while air-sterilization performance addresses airborne microorganisms such as bacteria and viruses; confirm that the purchased and tested models match.
Read guide →03 · GUIDE
Indoor CO₂ is a supporting indicator of occupant respiration, outdoor-air supply, and ventilation. Typical particle-removal air purifiers are not primarily designed to remove CO₂, so check ventilation first and interpret any product result only for its stated model, initial concentration, operating time, and conditions.
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