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

1989

Arasteh, Dariush K, Stephen E Selkowitz, and John R Wolfe."The Design and Testing of a Highly Insulating Glazing System for Use with Conventional Window Systems."Journal of Solar Energy Engineering 111.1 (1989) 44-53. DOI

Schuman, Jennifer E, Robert Sullivan, Stephen E Selkowitz, Michael Wilde, and Michael D Kroelinger."A Daylight Design Tool Using a Hypercard on the Macintosh."3rd National Conference on Microcomputer Applications in Energy (1989).

Selkowitz, Stephen E."Daylighting Technology Assessment: Final Report. NYSERDA." (1989).

Sullivan, Robert, and Stephen E Selkowitz."Fenestration Performance Analysis Using an Interactive Graphics-Based Methodology on a Microcomputer."ASHRAE Transactions 95 (1989).

1988

Papamichael, Konstantinos M, Joseph H Klems, and Stephen E Selkowitz."Determination and Application of Bidirectional Solar-Optical Properties of Fenestration Systems."13th National Passive Solar Conference (1988).

Sullivan, Robert, Dariush K Arasteh, Konstantinos M Papamichael, Jong-Jin Kim, Russell Johnson, Stephen E Selkowitz, and Ross McCluney."An Indices Approach for Evaluating the Performance of Fenestration Systems in Nonresidential Buildings."ASHRAE Transactions 94 (1988).

1987

Sullivan, Robert, Dariush K Arasteh, Glenn Sweitzer, Russell Johnson, and Stephen E Selkowitz."The Influence of Glazing Selection on Commercial Building Energy Performance in Hot and Humid Climates."ASHRAE Conference on Air Conditioning in Hot Climates (1987).

Sweitzer, Glenn, Dariush K Arasteh, and Stephen E Selkowitz."Effects of Low-E Glazing on Energy Use Patterns in Nonresidential Daylighting Buildings."ASHRAE Transactions 93 (1987) 1553-1566.

Sullivan, Robert, and Stephen E Selkowitz."Residential Heating and Cooling Energy Cost Implications Associated with Window Types."ASHRAE Transactions 93 (1987) 1525-1539.

Papamichael, Konstantinos M, and Stephen E Selkowitz."Simulating the Luminous and Thermal Performance of Fenestration Systems."Lighting Design + Application (1987).

1986

Selkowitz, Stephen E, Konstantinos M Papamichael, and Michael Wilde."A Concept for an Advanced Computer-Based Building Envelope Design Tool."Proceedings of the International Daylighting Conference (1986).

Arasteh, Dariush K, Russell Johnson, and Stephen E Selkowitz."Definition and Use of a Daylight Coolness Index."International Daylighting Conference (1986).

Kim, Jong-Jin, Konstantinos M Papamichael, Stephen E Selkowitz, Mark Spitzglas, and Michael F Modest."Determining Daylight Illuminance in Rooms Having Complex Fenestration Systems."Proceedings of the International Daylighting Conference (1986).

Kim, Jong-Jin, Konstantinos M Papamichael, and Stephen E Selkowitz."Development of Regression Equations for a Daylighting Coefficient-of-Utilization Model."Proceedings of the International Daylighting Conference (1986).

Johnson, Russell, and Stephen E Selkowitz."Light Guide Design Principles."International Daylighting Conference (1986).

Warren, M, Stephen E Selkowitz, Oliver C Morse, Charles C Benton, and James E Jewell."Lighting System Performance in an Innovative Daylighted Structure: An Instrumented Study."International Daylighting Conference, November 5-7, 1986 (1986).

Papamichael, Konstantinos M, Francis M Rubinstein, Stephen E Selkowitz, and Gregory J Ward."The Integration of Operable Shading Systems and Lighting Controls."Proceedings of the International Daylighting Conference (1986).

Benton, Charles C, M Warren, Stephen E Selkowitz, Rudolph R Verderber, J McBride, Oliver C Morse, and James E Jewell."A Field Evaluation of Daylighting System Performance."Advanced Building Technology, 10th CIB Congress, September 21-26, 1986 (1986).

Warren, M, Charles C Benton, Rudolph R Verderber, Oliver C Morse, Stephen E Selkowitz, and James E Jewell."Evaluation of Integrated Lighting System Performance in a Large Daylighted Office Building."1986 ACEEE Summer Study on Energy Efficiency in Buildings, August 17-23, 1986 (1986).

Benton, Charles C, B Erwine, M Warren, and Stephen E Selkowitz."Field Measurement of Light Shelf Performance in a Major Office Installation."11th National Passive Solar Conference, June 8-14, 1986 (1986).

Sullivan, Robert, Yu Joe Huang, James Bull, Isaac Turiel, Ronald L Ritschard, and Stephen E Selkowitz."Thermal Analysis of Buildings - Configuration Perturbations and Observed Climate Interface."ASHRAE Transactions 92 (1986).

Selkowitz, Stephen E, and J.W Griffith."Effective Daylighting in Buildings - Revisited."Lighting Design + Application (1986).

1985

Arasteh, Dariush K, Stephen E Selkowitz, and John Hartmann."Detailed Thermal Performance Data on Conventional and Highly Insulating Window Systems."International Daylighting Conference (1985).

Johnson, Russell, Dariush K Arasteh, Deborah J Connell, and Stephen E Selkowitz."The Effect of Daylighting Strategies on Building Cooling Loads and Overall Energy Performance."Proceedings of the ASHRAE/DOE/BTECC Conference (1985).

Johnson, Russell, Deborah J Connell, Stephen E Selkowitz, and Dariush K Arasteh."Advanced Optical Materials for Daylighting in Office Buildings."10th Passive Solar Conference (1985).