Brennan Lesshas spent nine years as a building science researcher at Lawrence Berkeley National Laboratory in the Residential Building Systems group and the Indoor Environment group. His current work focuses on state-of-the-art field measurements and simulations of smart ventilation systems, hygrothermal performance of sealed and insulated attics, indoor air quality, deep energy retrofits, zero net energy homes, and the health-energy efficiency nexus. He regularly presents his work at national conferences for the home performance and IAQ industries, and he is the author of over 20 research reports and technical journal articles. Brennan holds a Master of Science in Architecture degree from UC Berkeley – California (2012). He also has extensive experience as a home energy auditor and in residential construction and brings this hands-on approach to his research activities.
HUD MBEST Tool Development - May 25th 2023
A team of BTUS researchers created the Multifamily Building Efficiency Screening Tool (MBEST) for HUD's Green and Resilient Retrofit Program (GRRP) [https://www.hud.gov/grrp/
Spot: Brennan Less - January 23rd 2020
Leading the Smart Ventilation for Advanced California Homes project to a successful conclusion.
Societal Impact Award - October 04th 2019
2019 Societal Impact
Citation: In recognition of the Residential Ventilation Team’s scientific research and development of technologies, practices, and standards for residential ventilation that have made millions of homes healthier and more comfortable.