Dr. Iain Walker is a scientist at Lawrence Berkeley National Laboratory. He has more than 30 years of experience as a building scientist, conducting research on indoor air quality, ventilation, and reducing the energy and climate impacts of buildings. He is an ASHRAE Fellow and recently served on the Residential Team of the ASHRAE COVID-19 Epidemic Task Force. He works on standards and technical committees for ASHRAE, ASTM, RESNET, the IEA and other national and international organizations. His current work focuses on residential ventilation and home decarbonization.