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

2004

Deringer, Joseph J, Maithili Iyer, and Yu Joe Huang."Transferred Just on Paper? Why Doesn't the Reality of Transferring/Adapting Energy Efficiency Codes and Standards Come Close to the Potential?."ACEEE Summer Study on Energy Efficiency in Buildings (2004).

Zhou, Nan, Weijun Gao, Chris Marnay, Masaru Nishida, and Toshio Ojima."Validation of the Thermal Effect of Roof-Spraying and Green Plants in an Insulated Building."SimBuild 2004, IBPSA-USA National Conference, August 4-6, 2004 (2004).

Liesen, Richard J, and Rahul Chillar."Variable Heat Recovery in Double Bundle Electric Chillers."SimBuild 2004, Building Sustainability and Performance Through Simulation (2004).

Matson, Nance, and Max H Sherman."Why We Ventilate Our Houses – An Historical Look."2004 ACEEE Summer Study on Energy Efficiency in Buildings, August 22-27, 2004 7 (2004) 241-250.

Jeng, Ming-Shan, Tengfang T Xu, and Chao-Ho Lan."Towards Green Systems for Cleanrooms: Energy-Efficient Fan Filter Units."SEMI Technology Symposium: Innovations in Semiconductor Manufacturing (2004) 73-77.

Webster, Thomas L."Alternative Air Conditioning Technologies: Underfloor Air Distribution (UFAD)." (2004).

Bhattacharya, Prajesh, S.K Saha, Ajay K Yadav, Patrick E Phelan, and Ravi S Prasher."Brownian Dynamics Simulation to Determine the Effective Thermal Conductivity of Nanofluids."Journal of Applied Physics 95.11 (2004) 6492–6494. DOI

Carroll, William L."RESEM-CA Final Project Report." (2004).

Roberson, Judy A, Carrie A Webber, Marla C McWhinney, Richard E Brown, Margaret J Pinckard, and John F Busch."After-hours Power Status of Office Equipment and Energy Use of Miscellaneous Plug-Load Equipment." (2004) 38.

Bourassa, Norman, Mary Ann Piette, and Naoya Motegi."An Evaluation of Savings and Measure Persistence from Retrocommissioning of Large Commercial Buildings."Proceedings of the 2004 ACEEE Summer Study on Energy Efficiency in Buildings (2004).

Bourassa, Norman, Mary Ann Piette, and Naoya Motegi."Evaluation of Retrocommissioning Persistence in Large Commercial Buildings."Proceedings of the 12th National Conference on Building Commissioning (2004).

McWhinney, Marla C, Gregory K Homan, Richard E Brown, Judy A Roberson, Bruce Nordman, and John F Busch."Field Power Measurements of Imaging Equipment." (2004).

Byon, Eungsun, Jong-Kuk Kim, Sik-Chol Kwon, and André Anders."Effect of Ion Mass and Charge State on Transport Vacuum Arc Plasmas Through a Biased Magnetic Filter."IEEE Transactions on Plasma Science 32.2 (2004) 433-439. DOI

Griffith, Brent T, and Qingyan Chen."Framework for Coupling Room Air Models to Heat Balance Model Load and Energy Calculations (RP-1222)."HVAC&R Research (ASHRAE) 10.2 (2004).

Sowell, Edward F, Michael A Moshier, Philip Haves, and Dimitri Curtil."Graph-Theoretic Methods in Simulation Using SPARK."High Performance Computing Symposium of the Advanced Simulation Technologies Conference (Society for Modeling Simulation International) (2004).

Sowell, Edward F, Michael A Moshier, and Philip Haves."Graph-theoretic Methods in Simulation Using SPARK."High Performance Computing Symposium of the Advanced Simulation Technologies Conference (2004).

Carmody, John, Stephen E Selkowitz, Eleanor S Lee, and Dariush K Arasteh."Window Systems for High-Performance Buildings." (2004) 400.

Webber, Carrie A, Richard E Brown, and Marla C McWhinney."2004 Status Report: Savings Estimates for the ENERGY STAR Voluntary Labeling Program." (2004).

Bhattacharya, Prajesh, Patrick E Phelan, and Ravi S Prasher."Determining the Effective Viscosity of a Nanofluid Using Brownian Dynamics Simulation."1st International Symposium on Micro & Nano Technology (2004).

Selkowitz, Stephen E, and Eleanor S Lee."Integrating Automated Shading and Smart Glazings with Daylight Controls."International Symposium on Daylighting Buildings (2004) B13-B20.

Akbari, Hashem, and Steven J Konopacki."Energy effects of heat-island reduction strategies in Toronto, Canada."Energy 29.2 (2004) 191-210. DOI

Calhoun, R, Patrick E Phelan, Ajay K Yadav, and Prajesh Bhattacharya."Numerical Tools For Particle- Fluid Interactions."Pulmonary Research Forum: American Lung Association of Arizona & New Mexico (2004).

Yee, Gaymond, and Thomas L Webster."Trends in Energy Management Technology - Part 3: State of Practice of Energy Management, Control, and Information Systems." (2004).

Yee, Gaymond, and Thomas L Webster."Trends in Energy Management Technology - Part 4: Review of Advanced Applications in Energy Management, Control, and Information Systems." (2004).

Diamond, Richard C, Craig P Wray, Brian V Smith, Darryl J Dickerhoff, Nance Matson, and Skylar A Cox."A prototype data archive for the PIER "thermal distribution systems in commercial buildings" project." (2004).