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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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    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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    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
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    • Lighting
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Publications

Publications By Research Area

  • Cool Roofs & Walls
  • Decision Science
  • 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: Henry Willem

2014

Hult, Erin L, Henry Willem, Phillip N Price, Toshifumi Hotchi, Marion L Russell, and Brett C Singer."Formaldehyde and acetaldehyde exposure mitigation in US residences: In-home measurements of ventilation control and source control." (2014).
Hult, Erin L, Henry Willem, and Max H Sherman."Formaldehyde Transfer in Residential Energy Recovery Ventilators."Building and Environment (2014).

2013

Willem, Henry, Erin L Hult, Toshifumi Hotchi, Marion L Russell, Randy L Maddalena, and Brett C Singer."Ventilation Control of Volatile Organic Compounds in New U.S. Homes: Results of a Controlled Field Study in Nine Residential Units." (2013).

2012

Offermann, Francis J, Randy L Maddalena, Francis J Offermann, Brett C Singer, and Henry Willem."The impact of ventilation rate on the emission rates of volatile organic compounds in residences."Healthy Buildings 2012 - 10th International Conference (2012).

2010

Willem, Henry, and Brett C Singer."Chemical Emissions of Residential Materials and Products: Review of Available Information." (2010).

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