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

2013

Lee, Eleanor S., Luis L. Fernandes, Brian E. Coffey, Andrew McNeil, Robert D. Clear, Thomas L. Webster, Fred S. Bauman, Darryl J. Dickerhoff, David Heinzerling, and Tyler Hoyt."A Post-Occupancy Monitored Evaluation of the Dimmable Lighting, Automated Shading, and Underfloor Air Distribution System in The New York Times Building." (2013).

2012

Clear, Robert D.."Discomfort Glare: What Do We Actually Know?."Lighting Research and Technology April 2012 (2012). DOI

2011

Konis, Kyle S., Eleanor S. Lee, and Robert D. Clear."Visual Comfort Analysis of Innovative Interior and Exterior Shading Systems for Commercial Buildings using High Resolution Luminance Images."LEUKOS The Journal of the Illuminating Engineering Society of North America 7.3 (2011). DOI

2010

Clear, Robert D.."Post-Occupancy Evaluation of The New York Times Headquarters Building: an Examination of Causes for Occupant Satisfaction and Dissatisfaction with the Energy-Efficiency Measures." (2010).

2009

Lee, Eleanor S., Stephen E. Selkowitz, Dennis L. DiBartolomeo, Joseph H. Klems, Robert D. Clear, Kyle S. Konis, Robert J. Hitchcock, Mehry Yazdanian, Robin Mitchell, and Maria Konstantoglou."High Performance Building Facade Solutions: PIER Final Project Report." (2009).

Lee, Eleanor S., Stephen E. Selkowitz, Dennis L. DiBartolomeo, Joseph H. Klems, Robert D. Clear, Kyle S. Konis, Maria Konstantoglou, and Mark Perepelitza."Innovative Façade Systems for Low-energy Commercial Buildings." (2009).

Lee, Eleanor S., Dennis L. DiBartolomeo, Joseph H. Klems, Robert D. Clear, Kyle S. Konis, Mehry Yazdanian, and Byoung-Chul Park."Field Measurements of Innovative Indoor Shading Systems in a Full-Scale Office Testbed."ASHRAE Transactions 115.2 (2009) 706-728.

2007

Lee, Eleanor S., Glenn D. Hughes, Robert D. Clear, Luis L. Fernandes, Sila Kiliccote, Mary Ann Piette, Francis M. Rubinstein, and Stephen E. Selkowitz."Daylighting the New York Times Headquarters Building: Final Report: Commissioning Daylighting Systems and Estimation of Demand Response." (2007).

Lee, Eleanor S., Robert D. Clear, Gregory J. Ward, and Luis L. Fernandes."Commissioning and verification procedures for the automated roller shade system at The New York Times Headquarters." (2007).

Lee, Eleanor S., Robert D. Clear, Gregory J. Ward, and Luis L. Fernandes."Quick Start Guide: Commissioning and verification procedures for the automated roller shade system at The New York Times Headquarters." (2007).

2006

Clear, Robert D., Vorapat Inkarojrit, and Eleanor S. Lee."Subject Response to Electrochromic Windows."Energy and Buildings 38.7 (2006) 758-779. DOI

Lee, Eleanor S., Stephen E. Selkowitz, Robert D. Clear, Dennis L. DiBartolomeo, Joseph H. Klems, Luis L. Fernandes, Gregory J. Ward, Vorapat Inkarojrit, and Mehry Yazdanian."Advancement of Electrochromic Windows." (2006).

Clear, Robert D.."Summary results of visual comfort measurements at the electrochromic windows testbed." (2006).

Lee, Eleanor S., Stephen E. Selkowitz, Robert D. Clear, Dennis L. DiBartolomeo, Joseph H. Klems, Luis L. Fernandes, Gregory J. Ward, Vorapat Inkarojrit, and Mehry Yazdanian."A Design Guide for Early-Market Electrochromic Windows." (2006).

2005

Lee, Eleanor S., Stephen E. Selkowitz, Glenn D. Hughes, Robert D. Clear, Gregory J. Ward, John Mardaljevic, Judy Lai, Mehlika Inanici, and Vorapat Inkarojrit."Daylighting the New York Times Headquarters Building: Final Report." (2005).

2004

Huang, Yu Joe, Robin Mitchell, Stephen E. Selkowitz, Dariush K. Arasteh, and Robert D. Clear."Development of Trade-Off Equations for EnergyStar Windows."SimBuild 2004 (2004).

1999

Arasteh, Dariush K., Yu Joe Huang, Robin Mitchell, Robert D. Clear, and Christian Kohler."A Database of Window Annual Energy Use in Typical North American Residences."2000 ASHRAE Winter Meeting (1999).

1998

Vine, Edward L., Eleanor S. Lee, Robert D. Clear, Dennis L. DiBartolomeo, and Stephen E. Selkowitz."Office Worker Response to an Automated Venetian Blind and Electric Lighting System: A Pilot Study."Energy and Buildings 28.2 (1998) 205-218. DOI

Clear, Robert D., and Francis M. Rubinstein."A Cost-Benefit Analysis Applied to Lumen Maintenance Controls."Journal of the Illuminating Engineering Society 28 (1998) 113-126.

1995

Clear, Robert D.."Relationships between the VL and Reaction Time Models."IESNA Conference 25 (1995) 14-24.

Clear, Robert D., and Richard G. Mistrick."Multilayer Polarizers: A Review of the Claims."Journal of the Illuminating Engineering Society 25 (1995).

1994

Clear, Robert D., and Sam M. Berman."Environmental and Health Aspects of Lighting: Mercury."Journal of the Illuminating Engineering Society 23 (1994) 138-156.

1992

Clear, Robert D., and Sam M. Berman."Economics and Lighting Level Recommendations."Journal of the Illuminating Engineering Society 22 (1992).

Bailey, Ian L., Robert D. Clear, and Sam M. Berman."Size as a Determinant of Reading Speed."Journal of the Illuminating Engineering Society 22 (1992).

1991

Clear, Robert D., and Sam M. Berman."Polarization and glare on VDUs and Other Tilted Specular Surfaces."Illuminating Engineering Society Annual Conference 21(1) (1991) 29-40.