Associate Professor, Illinois Institute Of Technology
Dr. Brent Stephens is an Associate Professor in the Department of Civil, Architectural, and Environmental Engineering at Illinois Institute of Technology (Illinois Tech) in Chicago, IL. He also directs the Built Environment Research Group at Illinois Tech where he and his students investigate energy and air quality in the built environment. Dr. Stephens currently serves as Secretary of the International Society for Indoor Air Quality and Climate (ISIAQ), Chair of the ISIAQ Scientific and Technical Committee (STC) 21 on Ventilation, and Member and Research Subcommittee Chair of ASHRAE Technical Committee 2.4 on Particulate Air Contaminants and Particulate Contaminant Removal Equipment. Dr. Stephens has published over 40 peer-reviewed journal articles, editorials, and commentaries in his career. His research has been funded by the U.S. Environmental Protection Agency (EPA), the Alfred P. Sloan Foundation (APSF), the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), the Centers for Disease Control (CDC) through the National Institute for Occupational Safety and Health (NIOSH), the Air-Conditioning, Heating and Refrigeration Institute (AHRI), and the National Air Filtration Association (NAFA) Foundation.
Originally published in 2008, the U.S. EPA's Guide to Air Cleaners in the Home and its companion in-depth technical document have been made available online to provide consumers with information on different types of air cleaning devices, how they work, and how to evaluate their effectiveness for use in the home. Given this ever-changing field with new research results being published frequently, I recently worked with colleagues Lew Harriman and Terry Brennan to update these guidance documents. In this talk I will summarize some of our findings. Major additions and updates to the previous version will include: a detailed summary of research on the health benefits of using portable air cleaners and central HVAC filtration in homes; updated information on air cleaner noise; updated information on ultrafine particle removal and in-situ removal effectiveness of fine and ultrafine particles in homes; and updated recommendations for improved central HVAC filtration efficiency.