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.
Woody Delp, Brennan Less, Brett Singer, Iain Walker
"Assessment of peak power demand reduction available via modulation of building ventilation systems." Energy and Buildings (2020). .
"Measured Moisture Performance of Sealed and Insulated Attics with Permeable Insulation In California Homes." Thermal Performance of the Exterior Envelopes of Buildings XIV (2020). .
"Energy savings with outdoor temperature-based smart ventilation control strategies in advanced California homes." Energy and Buildings 194 (2019) 317 - 327. 2001207. .
"Efficacy of occupancy-based smart ventilation control strategies in energy-efficient homes in the United States." Building and Environment 156 (2019) 253 - 267. LBNL-2001199. .
"Rethinking Occupancy-Based Ventilation Controls." 39th AIVC Conference. 2018. 2001245. .
Smart Ventilation Controls for Occupancy and Auxiliary Fan Use Across U.S. Climates. 2017. LBNL-2001118. .
"Smart Ventilation Control of Indoor Humidity in High Performance Homes in Humid U.S. Climates." ASHRAE (2016). LBNL-1006980. .
Assessment of Literature Related to Combustion Appliance Venting Systems. 2015. LBNL-176805. .
Deep Energy Retrofit Guidance for the Building America Solutions Center. 2015. LBNL-184443. .
"Indoor Air Quality in 24 California Residences Designed as High-Performance Homes." (2015). LBNL-6937E. .
A Meta-Analysis of Single-Family Deep Energy Retrofit Performance in the U.S. 2014. LBNL-6601E. .
An Assessment of Envelope Measures in Mild Climate Deep Energy Retrofits. 2014. LBNL-6880E. .
Houses are Dumb without Smart Ventilation. 2014. LBNL-6747E. .
Indoor Air Quality and Ventilation in Residential Deep Energy Retrofits. 2014. LBNL-6881E. .