About Us +
Researchers in the Building Technology & Urban Systems Division (BTUS) at Lawrence Berkeley National Laboratory develop data and technologies that increase energy efficiency and improve the health, safety and comfort of building occupants, in the United States and worldwide.

We work closely with industry partners, academics and government officials to achieve these goals, and share our research widely
Research +
We are at the forefront of cutting-edge research that redefines building technology and explores all areas of urban systems.

We have been leaders for decades in developing energy-efficient windows, improving indoor air quality, coming up with new ideas to fix the nation's electricity grid, and so much more.

Visit our research areas at the right to find out more.
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Publications +
Enjoy presentations from Building Technology & Urban systems research experts on a wide variety of topics in the areas of building energy efficiency, the electricity grid and how it relates to buildings and much more.
- Presentations
News
Tools & Guides +
Explore our tools, guidebooks and software and download for free.

We offer a variety of technologies designed to simulate and model real-world circumstances to assist in energy-saving programs and help building owners build better buildings. These tools can help calculate performance of building systems like windows and shades, help consumers and builders pick the best windows for a variety of applications and much more.

Publications

Publications By Research Area

2023

Hart, Robert, Stephen Fisher, and Stephen Morse."Guidelines for Determining the Load Resistance of Thin-Glass Triple-Pane Insulating Glass Unit Configurations." (2023). DOI

2020

Lee, Eleanor S, Anothai Thanachareonkit, D. D Charlie Curcija, Gregory J Ward, Taoning Wang, David Geisler-Moroder, Christoph Gehbauer, John Breshears, Luis L Fernandes, Stephen E Selkowitz, Robert Hart, Christian Kohler, David Blum, Jinqing Peng, and Howdy Goudey."High-Performance Integrated Window and Façade Solutions for California." (2020).

2019

Hart, Robert, Stephen E Selkowitz, and D. D Charlie Curcija."Thermal performance and potential annual energy impact of retrofit thin-glass triple-pane glazing in US residential buildings."Building Simulation 12.1 (2019) 79 - 86. DOI

2018

Selkowitz, Stephen E, Robert Hart, and D. D Charlie Curcija."Breaking the 20 Year Logjam to Better Insulating Windows."2018 ACEEE Summer Study on Energy Efficiency in Buildings (2018). DOI

Hart, Robert."Numerical and experimental validation for the thermal transmittance of windows with cellular shades."Energy and Buildings 166 (2018) 358 - 371. DOI

Hart, Robert, Howdy Goudey, and D. D Charlie Curcija."Experimental validation for thermal transmittances of window shading systems with perimeter gaps."Journal of Building Performance Simulation (2018) 1 - 13. DOI

2017

Hart, Robert, Howdy Goudey, and D. D Charlie Curcija."Experimental validation and model development for thermal transmittances of porous window screens and horizontal louvred blind systems."Journal of Building Performance Simulation 11.2 (2017) 190 - 204. DOI

2015

Yazdanian, Mehry, D. D Charlie Curcija, Christian Kohler, Dragan Vidanovic, Robert Hart, and Stephen Czarnecki."Control algorithms for dynamic windows for residential buildings."Energy and Buildings 109 (2015). DOI

2013

Van Den Bergh, Sofie, Robert Hart, Bjørn Petter Jelle, and Arlid Gustavsen."Window Spacers and Edge Seals in Insulating Glass Units: A State-of-the-Art Review and Future Perspectives."Energy and Buildings 58 (2013) 263–280. DOI

2012

Hart, Robert, Howdy Goudey, Dariush K Arasteh, and Dragan C Curcija."Thermal Performance Impacts of Center-of-Glass Deflections in Installed Insulating Glazing Units."Energy and Buildings 54.November 2012 (2012) 453-460. DOI

Arasteh, Dariush K, Robert Hart, Cezary Misiopecki, Arlid Gustavsen, and Bjørn Petter Jelle."Impacts of Operating Hardware on Window Thermal Performance."BEST3 Conference (2012).

Jelle, Bjørn Petter, Andrew Hynd, Arlid Gustavsen, Dariush K Arasteh, Howdy Goudey, and Robert Hart."Fenestration of Today and Tomorrow: A State-of-the-Art Review and Future Research Opportunities."Solar Energy Materials and Solar Cells 96 (2012) 1-28. DOI

2011

Hart, Robert, Dragan C Curcija, Dariush K Arasteh, Howdy Goudey, Christian Kohler, and Stephen E Selkowitz."Research Needs: Glass Solar Reflectance and Vinyl Siding." (2011).