| Building Technology and Urban Systems

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.
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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.

1981

Bryan, Harvey J, Robert D Clear, James Rosen, and Stephen E Selkowitz."Quicklite 1, A Daylighting Program for the TI-59 Calculator." (1981) 27.

Klems, Joseph H."A Calibrated Hotbox for Testing Window Systems - Construction, Calibration, and Measurements on Prototype High-Performance Windows."ASHRAE Transactions 85 (1981) 930-941.

Clear, Robert D, and Sam M Berman."A New Look at Models of Visual Performance."Journal of the Illuminating Engineering Society 12 (1981) 242-247.

Rubin, Michael D."Calculating Heat Transfer Through Windows."Int. J. Energy res. 6 (1981) 341-349.

Rubin, Michael D."Calculating Heat Transfer Through Windows." (1981).

Modest, Michael F."Daylighting Calculation for Non-Rectangular Interior Spaces with Shading Devices."Energy and Buildings 5 (1981) 69-79.

Selkowitz, Stephen E."Daylighting Design Overlays for Equidistant Sun-Path Projections."International Passive and Hybrid Cooling Conference (1981) 338-341.

Selkowitz, Stephen E."Daylighting Research Activities in the Energy-Efficient Buildings Program." (1981).

Neeman, Eliyahu, and Stephen E Selkowitz."Efficient Daylighting in Thermally Controlled Environments."International Passive and Hybrid Cooling Conference (1981) 670-681.

Lampert, Carl M."Heat Mirror Coatings for Energy Conserving Windows."Solar Energy Materials 6 (1981).

Klems, Joseph H."Methods of Estimating Air Infiltration through Windows."Energy and Buildings 5 (1981) 243-252.

Selkowitz, Stephen E."Thermal Performance of Insulating Window Systems."ASHRAE Transactions 85.2 (1981).

Rubin, Michael D, and Stephen E Selkowitz."Thermal Performance of Windows Having High Solar Transmittance."6th International Passive and Solar Conference (1981) 141-145.

1980

Selkowitz, Stephen E, and Russell Johnson."The Daylighting Solution."Solar Age (1980) 14-20.

Bryan, Harvey J, and Robert D Clear."A Procedure for Calculating Interior Daylight Ilumination."5th National Passive Solar Conference (1980).

Speltz, J, and Philip Haves."The Thermal Benefits and Cost Effectiveness of Earth Berming."5th National Passive Solar Conference 5.1 (1980).

Lampert, Carl M."Thin Film Electrochromic Materials for Energy Efficient Windows." (1980).

Kohler, Thomas P."Electronic Screw-In Ballast and Improved Circline Lamp Phase I: Final Report." (1980).

Clear, Robert D, and Sam M Berman."Cost Effectiveness of Visibility-Based Design Procedures for General Office Lighting."Illuminating Engineering Society Annual Technical Conference (1980).

Haves, Philip, D Bently, and Gene Clark."Heat Transfer in Passively Cooled Buildings."ASME/AIChE National Heat Transfer Conference (1980).

Weidt, John L, and Jenny Weidt."Air Leakage of Newly Installed Residential Windows." (1980).

Bryan, Harvey J, and Robert D Clear."Calculating Interior Daylight Illumination with a Programmable Hand Calculator."Journal of the Illuminating Engineering Society 07/1981 (1980) 219-227.

Verderber, Rudolph R, and Oliver C Morse."Cost Effectiveness of Long Life Incandescent Lamps and Energy Buttons."Electrical Construction and Maintenance 80 (1980).

King, William J."High Performance Solar Control Windows, Final Report." (1980).

Rubinstein, Francis M, and Rudolph R Verderber."Lighting Controls: Survey of the Potential Market."Energy 8.6 (1980) 433-449.