A Game Changer in Building Assessment and Commissioning: Aerosol Tracer Testing Comes of Age in ASHRAE Standard 241

ASHRAE Standard 241-2023, Control of Infectious Aerosols, introduces a groundbreaking test method for assessing the equivalent clean airflow rate for infection risk control. This column shares results from 395 tests conducted in schools and offices across 21 cities in five countries and three continents, covering various climate zones. Results show that the ASHRAE Standard 241-2023 Appendix C test not only demonstrates compliance with these guidelines but also helps save energy in offices while improving indoor air quality to reduce infection risks.