The building performance industry has lost another friend with the passing of Bion D. Howard. Bion was a tireless advocate of home energy ratings and building science. His background includes service with the National Association of Home Builders, the Alliance to Save Energy, NAHB Research Center, the Environmental Protection Agency, the National Institute for Standards and Technology (NIST) and consulting as the owner of Building Environmental Scientist and Consulting (B.E.S.T.). Mr. Howard also served on the RESNET Technical Committee. RESNET Executive Director Steve Baden commented, “I had the pleasure to work closely with Bion on a number of initiatives ranging from the Department of Energy/Housing and Urban Development National Collaborative on Home Energy Ratings and Energy Efficient Mortgages to the planning committee of the Affordable Comfort Conferences. He was a tireless advocate for building science and home energy ratings. Everyone who worked with Bion appreciated his technical expertise and commitment. The building performance industry has loss a good friend.”