Dr. Jeff Siegel is an Associate Professor in the Department of Civil Engineering and the Dalla Lana School of Public Health at The University of Toronto. Prior to accepting his current position he was an Associate Professor at the University of Texas, Austin. His interests and research have focused on healthy and sustainable buildings, ventilation and indoor air quality in residential and commercial buildings, control of indoor particulate matter, secondary impacts of control technologies and strategies, aerosol dynamics in indoor environments and HVAC systems. He is also keenly interested in ensuring that good research works its way into practice and this week we want to focus on that theme. Dr. Siegel's Ph.D. is in Mechanical Engineering (2002) from the University of California, Berkeley, he also has an M.S. in Mechanical Engineering (1999) from the same institution and a B.S. in Engineering (1995) from Swarthmore College. He is a prolific researcher and speaker and a very active member of professionals societies and associations including ISIAQ and ASHRAE.