ASHRAE leads in providing technical resources for controlling infectious aerosols

Airborne pathogen control guidelines for aerosols provide crucial support during high-risk virus seasons and beyond. Providing clean air in buildings has also become even more critical.

ASHRAE remains at the forefront by providing resources that are instrumental in safeguarding indoor environments. ASHRAE Standard 241-2023: Control of Infectious Aerosols continues to empower building owners, operators, and professionals to proactively reduce risks for occupants during peak virus seasons.

ASHRAE Standard 241 establishes minimum requirements to reduce the airborne transmission of viruses like SARS-CoV-2, the flu, and other pathogens. This standard applies to various building types, including single- and multi-family homes, offices, schools, and healthcare facilities. Former White House COVID Response Coordinator Dr Ashish Jha praised it as – one of the most important public health interventions seen in years. The potential for federal adoption highlights its crucial role in protecting public health across the built environment.

2024-25 ASHRAE President M. Dennis Knight, P.E., BEMP, Fellow Life Member ASHRAE said, “Standard 241 reinforces ASHRAE’s dedication to improving the health and well-being of building occupants. The Society supports legislation to improve indoor environmental quality (IEQ), which we know is a long-term solution in mitigating disease transmission and this standard is a foundational piece. By making the integration of strategies to control infectious aerosols the norm, we are helping to create safer indoor environments”.

Standard 241 provides detailed guidance on the design, installation, commissioning, and maintenance of HVAC systems to control the spread of infectious aerosols. This covers ventilation rates, filtration, and air cleaning technologies and includes a building readiness plan to evaluate the performance of existing or new HVAC systems.

ANSI/ASHRAE Standard 62.1, Ventilation and Acceptable Indoor Air Quality and Standard 62.2, Ventilation and Acceptable Indoor Air Quality in Residential Buildings, are also key resources for tackling poor indoor air quality (IAQ) in commercial and residential buildings, impacting health, comfort, and productivity. The Standards provide three compliance methods: prescriptive, performance-based, and natural ventilation approaches.