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.
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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.

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2025

Levinson, Ronnen M, Donghan Kim, Howdy Goudey, Sharon S Chen, Hui Zhang, Ali Ghahramani, Charlie Huizenga, yingdong He, Akihisa Nomoto, Alexander Merritt, Edward A Arens, Ana Alvarez Suarez, David Ritter, Markus Tarin, and Robert Prickett."Hot, Cold, or Just Right? An Infrared Biometric Sensor to Improve Occupant Comfort and Reduce Overcooling in Buildings via Closed-loop Control." (2025).

Office, U.S Department of Energy Industrial Efficiency and Decarbonization, Heidi Fuchs, Unique Karki, Tae-Hwan Lim, Peng Peng, Prakash Rao, Arman Shehabi, and Jibran Zuberi."Transformative Pathways for U.S. Industry: Unlocking American Innovation." (2025). DOI

Zheng, Wanfu, Laura Zabala, Jesus Febres, David Blum, and Zhe Wang."Quantifying and simulating the weather forecast uncertainty for advanced building control."Journal of Building Performance Simulation (2025) 1-16. DOI

2024

Belaid, Youba Nait, Miguel Heleno, and Kristina Hamachi LaCommare."Reconductoring Economic and Financial Analysis (REFA) Tool." (2024).

Satre-Meloy, Aven, Nuria Casquero-Modrego, Iain S Walker, and Brennan Less."Reducing the Cost of Home Energy Upgrades in the US: An Industry Survey."Journal of Building Engineering, October, 110939 (2024). DOI

Walker, Iain S, Brennan Less, Nuria Casquero-Modrego, Cara Lozinsky, and Michael D Sohn."The Impact of Simplified Window and Exhaust Fan Assumptions on Model- Based Predictions of Inter-Zonal Air Flow and Contaminant Transport in Multifamily Buildings."Proceedings of the 44th AIVC Conference, Dublin, Ireland. (2024).

Srinivasan, Pavitra, Nora Esram, Helen Chen, and Reshma Singh."A Proposed Evaluation Framework for New and Emerging LowEmbodied-Carbon Concrete Technologies." 2024 ACEEE Summer Study on Energy Efficiency in Buildings (2024). DOI

Less, Brennan, Iain S Walker, Sean Murphy, and Eric Fournier."Electrical Service Panel Capacity in California Households with Insights for Equitable Building Electrification."Proceedings of the ACEEE Summer Study 2024. ACEEE, Washington, DC (2024).

Singh, Reshma, Yashima Jain, Laura Wong, Mary Weigel, and Nicholas Ryan."From IMPEL to Impact: Lessons Learned in Accelerating Innovative Building Technologies."2024 ACEEE Summer Study on Energy Efficiency in Buildings (2024). DOI

Less, Brennan, and Iain S Walker."HVAC Heat Pump Upgrades and their Impact on Household Maximum Power Demand."Proceedings of the ACEEE Summer Study 2024. ACEEE, Washington, DC (2024).

Szum, Carolyn, Han Li, Robin Mitchell, Sydney Applegate, Billierae Engelman, Nicholas Long, Yassen Roussev, and Eric Noller."New U.S. Data Tools are Playing a Crucial Role in Decarbonizing Buildings at Speed, Scale, and Low Cost."2024 ACEEE Summer Study on Energy Efficiency in Buildings (2024). DOI

Casquero-Modrego, Nuria, M Venkatraman, and Iain S Walker."The Costs of Decarbonizing Multifamily Buildings in DACs and Rural Areas."2024 Summer Study on Energy Efficiency in Buildings. American Council for an Energy Efficient Economy (ACEEE) (2024). DOI

Robinson, Alastair, Samuel Fernandes, Tianzhen Hong, Sang Hoon Lee, Ronnen M Levinson, and Mary Ann Piette."Potential Urban Heat Island Countermeasures and Building Energy Efficiency Improvements in Los Angeles County." (2024).

Zhao, Haoran, Wanyu R Chan, Chrissi Antonopoulos, Eric Martin, Paul Francisco, Iain S Walker, and Brett C Singer."Mechanical Ventilation and IAQ in Recently Constructed US Homes."Indoor Air 2024 (2024).

Walker, Iain S, Brennan Less, Cara Lozinsky, David M Lorenzetti, Nuria Casquero-Modrego, and Michael D Sohn."Compartmentalization and Ventilation System Impacts on Air and Contaminant Transport for Multifamily Buildings."International Journal of Ventilation. (2024). DOI

Shehabi, Arman, Sarah Josephine Smith, Alex Hubbard, Alexander Newkirk, Nuoa Lei, Md AbuBakar Siddik, Billie Holecek, Jonathan G Koomey, Eric R Masanet, and Dale A Sartor."2024 United States Data Center Energy Usage Report." (2024). DOI

Bhatia, Aviruch, Shanmukh Dontu, Vishal Garg, and Reshma Singh."Approach for energy efficient building design during early phase of design process."Energy Informatics 7.1 (2024). DOI

Thanachareonkit, Anothai, Luis L Fernandes, Howdy Goudey, and Jacob C Jonsson."DIY Affordable Window Shading." (2024).

Earni, Shankar, Amy Pevzner, Unique Karki, Paul Sheaffer, Prakash Rao, Ross Charland, and Josh Weissert."Field Validation of Electrochemical Water Filtration System on an Open Loop Cooling Tower at Nissan Manufacturing Plant in Canton, Mississippi." (2024). DOI

Earni, Shankar, Amy Pevzner, Unique Karki, Prakash Rao, Ross Charland, and Josh Weissert."Field Validation of Electrochemical Water Filtration System on an Open Loop Cooling Tower at Toyota MotorManufacturing Plant in Blue Springs,Mississippi." (2024).

Zhao, Haoran, Iain S Walker, William W Delp, and Brett C Singer."Performance and usage of mechanical residential kitchen ventilation."ASHRAE Winter 2024 (2024).

2023

Walker, Iain S, Nuria Casquero-Modrego, and Brennan Less."Challenges and Opportunities for Home Decarbonization." (2023).

Granderson, Jessica, Samuel Fernandes, and Anand Prakash."Unmanned Aerial Vehicle Image Dataset of the Built Environment for 3D reconstruction (UAVID3D)." (2023). DOI

2022

Mathew, Paul A, Jordan Shackelford, Cynthia Regnier, Sang Hoon Lee, and Travis Walter."Energy efficiency package for rooftop unit replacement: laboratory testing and validation of energy savings."Science and Technology for the Built Environment (2022). DOI

Zhou, Nan, Reshma Singh, Carolyn Szum, and Mary Ann Piette."NZW South East Asia Center For Innovation in the Built Environment (SEIBE) A Preliminary Blueprint." (2022).