Case studies

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Indoor air quality · Education · Beijing

96%

indoor PM2.5 reduction vs. outdoor air

3.2

µg/m³ average indoor PM2.5 after the upgrade

International School of Beijing

Reducing PM2.5 with positive building pressurization and filtration upgrades

On high-pollution days, classrooms at a 51,000 m² campus were seeing fine-particle levels above 150 µg/m³. New fresh-air handlers with HEPA filtration, higher airflow and a pressurized building envelope brought average indoor levels down to 3 µg/m³.

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