ASHRAE’s Epidemic Task Force has added new information to its building reopening guidance.
“The Building Readiness Guide includes additional information and clarifications to assist designers and commissioning providers in performing pre- or post-occupancy flush calculations to reduce the time and energy to clear spaces of contaminants between occupancy periods,” Wade Conlan, P.E., CxA, BCxP, LEED AP® BD+C, a member of ASHRAE’s Epidemic Task Force and its Building Readiness Team lead and Hanson’s commissioning and energy discipline manager, said in an ASHRAE news release. “New information includes the theory behind the use of equivalent outdoor air supply, method for calculating the performance of filters and air cleaners in series, and filter droplet nuclei efficiency that help evaluate the systems’ ability to flush the building.”
The guide’s major updates include an updated pre- or post-slushing strategy, a link to a flushing time calculator, guidance for heating outdoor air and aligning the guide to ASHRAE’s recently released Core Recommendations for Reducing Airborne Infectious Aerosol Exposure. The guide and ASHRAE’s other resources related to COVID-19 can be found here.
Wade and fellow Epidemic Task Force members Dennis Knight, P.E., FASHRAE, DAL, CxA, BEMP, LEED AP® N.C. and O&M, and Sarah Maston, P.E., LEED AP®, will talk about how to analyze your HVAC systems and what engineering controls can be applied in the ASHRAE Learning Institute’s Feb. 24 course, “Evaluating Your HVAC System’s Readiness to Mitigate the Spread of SARS-CoV-2.”