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

2024

Casillas, Armando, Yimin Chen, Jessica Granderson, Guanjing Lin, Zhelun Chen, Jin Wen, and Sen Huang."Development of high-fidelity air handling unit fault models for FDD innovation: lessons learned and recommendations."Journal of Building Performance Simulation 17.5 (2024) 615-630. DOI

2023

Liu, Jingjing, Lili Yu, Rongxin Yin, Mary Ann Piette, Marco Pritoni, Armando Casillas, and Peter Schwartz."Factors Influencing Building Demand Flexibility." (2023). DOI

Yin, Rongxin, Jingjing Liu, Mary Ann Piette, Jiarong Xie, Marco Pritoni, Armando Casillas, Lili Yu, and Peter Schwartz."Comparing simulated demand flexibility against actual performance in commercial office buildings."Building and Environment 243 (2023) 110663. DOI

Lin, Guanjing, Armando Casillas, Maggie Sheng, and Jessica Granderson."Performance Evaluation of an Occupancy-Based HVAC Control System in an Office Building."Energies 16.20 (2023) 7088. DOI

2022

Liu, Jingjing, Rongxin Yin, Lili Yu, Mary Ann Piette, Marco Pritoni, Armando Casillas, Jiarong Xie, Tianzhen Hong, Monica Neukomm, and Peter Schwartz."Defining and applying an electricity demand flexibility benchmarking metrics framework for grid-interactive efficient commercial buildings."Advances in Applied Energy 8 (2022) 100107. DOI

Casillas, Armando, Guanjing Lin, Jessica Granderson, Sen Huang, and Yan Chen."Development of a Simulated Air Handling Unit Fault Dataset for FDD Tools: Lessons Learned and Considerations for FDD Developers."2022 ACEEE Summer Study on Energy Efficiency in Buildings (2022). DOI

Helmns, Dre, Armando Casillas, Anand Prakash, David Blum, Marco Pritoni, Spencer M Dutton, Jonathan Woolley, and Subhrajit Chakraborty."Heat Pumps with Phase Change Thermal Storage: Flexible, Efficient, and Electrification Friendly."2022 Summer Study on Energy Efficiency in Buildings (2022). DOI

Yu, Lili, Jingjing Liu, Rongxin Yin, Mary Ann Piette, Marco Pritoni, Armando Casillas, Monica Neukomm, and Amir Roth."When Do Efficiency and Demand Flexibility Go Hand-in-hand?."2022 Summer Study on Energy Efficiency in Buildings (2022). DOI

Casillas, Armando, Yimin Chen, Guanjing Lin, Jessica Granderson, Sen Huang, and Zhelun Chen."Modeling Air Handling Units to Create a Diverse Fault Dataset for FDD Innovation: Lessons Learned and Recommendations."7th International High Performance Buildings Conference (2022). DOI

2021

Helmns, Dre, David Blum, Armando Casillas, Anand Prakash, Jonathan Woolley, David Vernon, Caton Mande, Michael Woodcox, and Spencer M Dutton."Towards a Techno-Economic Analysis of PCM-Integrated Hybrid HVAC Systems."6th International High Performance Buildings Conference at Purdue (2021).