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    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

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  • 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.

    Colum 1 +
    • Windows & Daylighting
    • FLEXLAB® & Systems Integration
    • Electronics, Lighting & Networks
    • Modeling & Simulation
    • Indoor Air Quality
    • High Tech & Industrial
    Colum 2 +
    • Decision Science
    • Energy Analytics
    • The Grid & Demand Response
    • Cool Roofs & Walls
    • Urban Systems
  • 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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  • 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.

    • Whole Building
    • Occupant Behavior
    • Lighting
    • Windows and Envelope Materials
    • Cool Surfaces
    • City and Districts

Publications

Publications By Research Area

  • Cool Roofs & Walls
  • Decision Science
  • EMIS
  • Electronics, Lighting & Networks
  • Energy & Financing
  • Energy Analytics
  • FLEXLAB® and Systems Integration
  • High Tech & Industrial
  • Indoor Air Quality
  • Modeling & Simulation
  • The Grid & Demand Response
  • Windows & Daylighting
X Author: Michael Wetter X Term: BTUS Windows and Daylighting

2013

Zuo, Wangda, Andrew McNeil, Michael Wetter, and Eleanor S Lee."Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer."Journal of Building Performance Simulation (2013). DOI(link is external)

2012

Nouidui, Thierry Stephane, Michael Wetter, and Wangda Zuo."Validation of the Window Model of the Modelica Buildings Library." (2012).

2011

Wetter, Michael."GenOpt Generic Optimization Program, User Manual, Version 3.1.0." (2011).
Zuo, Wangda, Andrew McNeil, Michael Wetter, and Eleanor S Lee."Acceleration of Radiance for Lighting Simulation by using Parallel Computing with OpenCL."12th International Conference of the International Building Performance Simulation Association (Building Simulation 2011) (2011) p. 110-117.

2008

Wetter, Michael, and Philip Haves."A Modular Building Controls Virtual Test Bed for the Integration of Heterogeneous Systems."SimBuild 2008, July 30-August 1 (2008).

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