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

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

2022

Casquero-Modrego, Nuria, WR Chan, Brennan Less, and Iain S. Walker."Getting to Scale for Decarbonizing Homes in the US: An Industry Survey."SBE22Delft - Innovations for the Urban Energy Transition: Preparing for the European Renovation Wave (2022). DOI

Walker, Iain S., Brennan Less, David M. Lorenzetti, Michael D. Sohn, and Nuria Casquero-Modrego."Compartmentalization and Ventilation System Impacts on Air and Contaminant Transport for a Multifamily Building."Buildings XV Conference (2022).

Less, Brennan, Nuria Casquero-Modrego, and Iain S. Walker."Home Energy Upgrades as a Pathway to Home Decarbonization in the US: A Literature Review."Energies (2022). DOI

Walker, Iain S., Brennan Less, Nuria Casquero-Modrego, and Leo I. Rainer."The Costs of Home Decarbonization in the US."Proceedings of the 2022 Summer Study on Energy Efficiency in Buildings. (2022).

Walker, Iain S., Brennan Less, and Nuria Casquero-Modrego."Pathways to Home Decarbonization."Proceedings of the 2022 Summer Study on Energy Efficiency in Buildings. (2022).

Walker, Iain S., Brennan Less, and Nuria Casquero-Modrego."Carbon and Energy Cost Impacts of Electrification of Space Heating with Heat Pumps in the US." (2022). DOI

2021

Less, Brennan, Iain S. Walker, and Nuria Casquero-Modrego."Emerging Pathways to Upgrade the US Housing Stock: A Review of the Home Energy Upgrade Literature." (2021).

Less, Brennan, Iain S. Walker, Nuria Casquero-Modrego, and Leo I. Rainer."The Cost of Decarbonization and Energy Upgrade Retrofits for US Homes." (2021).