ASHRAE Standard 241: Preparing for the next pandemic and creating a new path to healthy indoor air quality

A Guide to Understanding and Applying ASHRAE 241: Control of Infectious Aerosols

Our common experience during the COVID-19 pandemic demonstrated that building owners and operators were unprepared to mitigate airborne disease transmission. Without knowing what the required minimum ventilation rate should be, it was impossible to respond properly. The pandemic is over but potential threats from COVID-19, its successors, and other infectious aerosols are here to stay.

Prior to March 2020, infectious aerosol transmission hadn’t been addressed for over 100 years, and indoor air quality in general was not a factor in building operations. Today, the perspective has changed, and we understand value of preparation for future events as well as the important role everyday indoor air quality has in health.

ASHRAE Standard 241 was developed in response to the pandemic, to provide a complete framework for planning, design, operation, and maintenance of systems that reduce the risk of airborne infection transmission.

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