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

1984

Klems, Joseph H.."Error Analysis of In-Situ Field Tests of Fenestration Performance."Energy and Buildings 8 (1984) 165-173.

Johnson, Russell, Robert Sullivan, Stephen E. Selkowitz, Shirley Nozaki, Craig Conner, and Dariush K. Arasteh."Glazing Energy Performance and Design Optimization with Daylighting."Energy and Buildings 6.4 (1984) 305-317. DOI

Choi, U.S., Russell Johnson, and Stephen E. Selkowitz."The Impact of Daylighting on Peak Electrical Demand."Energy and Buildings 6.4 (1984) 387-399. DOI

Jorgenson, Gordon."A Literature Study on Electrochromic and Thermochromic Materials: Final Report." (1984).

Klems, Joseph H.."Measurement of Fenestration Net Energy Performance: Considerations Leading to Development of the Mobile Window Thermal Test (MoWiTT) Facility."Journal of Solar Energy Engineering (1984).

Selkowitz, Stephen E.."Nomographs for Predesign Analysis of the Potential Electrical Eenrgy and Load Savings from Daylighting." (1984).

Neeman, Eliyahu, Glenn Sweitzer, and Edward L. Vine."Office Worker Response to Lighting and Daylighting Issues in Workspace Environments: A Pilot Survey."Energy and Buildings 6 (1984) 159-171.

Neeman, Eliyahu, and Stephen E. Selkowitz."Windows, Skylights and Atria - Occupants Visual/Subjective Comparison."ASHRAE Transactions 90 (1984).

1983

Neeman, Eliyahu, and Stephen E. Selkowitz."Daylight Availability as a Function of Atmospheric Conditions."5th Conference on Atmospheric Radiation (1983).

Selkowitz, Stephen E., and Carl M Lampert."Advanced Optical and Thermal Technologies for Aperature Control."Passive and Hybrid Solar Energy Update (1983).

Selkowitz, Stephen E., Russell Johnson, Robert Sullivan, and S. Choi."Impact of Fenestration on Energy Use and Peak Loads in Daylighted Commercial Buildings."8th National Passive Solar Conference (1983) 187-192.

Selkowitz, Stephen E.."New Tools for Analyzing Thermal and Daylighting Performance of Fenestration in Multistory Buildings."International Symposium on the Design of Multistory Buildings for Physical and Environmental Performance, June 1-3, 1983 (1983).

Navvab, Mojtaba, Mahmut Karayel, Eliyahu Neeman, and Stephen E. Selkowitz."Analysis of Atmospheric Turbidity for Daylight Calculations."Energy and Buildings 6 (1983) 293-303.

Johnson, Russell, Robert Sullivan, Shirley Nozaki, Stephen E. Selkowitz, Craig Conner, and Dariush K. Arasteh."Building Envelope Thermal and Daylighting Analysis in Support of Recommendations to Upgrade ASHRAE/IES Standard 90: Vol 1, Parametric Study, Analysis, and Results." (1983).

Winkelmann, Frederick C.."Daylighting Calculation in DOE-2." (1983).

Rubinstein, Francis M.."Photo-Electric Control of Equi-Illumination Lighting Systems."Energy and Buildings 6 (1983) 141-150.

Lampert, Carl M."Solar Optical Materials for Innovative Window Design."International Journal of Energy Research 7 (1983) 359-374.

Rubin, Michael D., and Carl M Lampert."Transparent Silica Aerogels for Window Insulation."Solar Energy Materials 7 (1983) 393-400.

Karayel, Mahmut, Mojtaba Navvab, Eliyahu Neeman, and Stephen E. Selkowitz."Zenith Luminance for Daylighting Calculations."Energy and Buildings 6 (1983) 283-291.

1982

Lampert, Carl M."Optical Films for Solar Energy Applications."International Society for Optical Engineering Conference (1982) 387.

Selkowitz, Stephen E., Carl M Lampert, and Michael D. Rubin."Advanced Optical and Thermal Technologies for Aperature Control."Passive and Hybrid Solar Energy Update (1982).

Peck, John F., T. Lewis Thompson, and Helen J. Kessler."Windows for Accepting or Rejecting Solar Heat Gain: Final Report." (1982).

Van Dyck, Robert L, and Thomas P. Konen."Energy Conservation through Interior Shading of Windows: An Analysis, Test and Evaluation of Reflective Venetian Blinds." (1982).

Lampert, Carl M, and Stephen E. Selkowitz."Transparent Heat-Mirror Materials and Deposition Technology."International Society of Optical Engineering (SPIE) Conference on Optical Coatings for Energy Efficiency and Solar Applications and the Conference on Optical Thin Films (1982).

Lampert, Carl M."Advanced Heat-Mirror Films for Energy-Efficient Windows."The Renewable Challenge: Proceedings of the ASISES Annual Meeting (1982) 733-738.