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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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  • 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
  • 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

1998

Hong, Tianzhen, and Yi Jiang."Outdoor synthetic temperature for the calculation of space heating load."Energy and Buildings 28.3 (1998) 269-277. DOI

1997

Hong, Tianzhen, and Yi Jiang."IISABRE: An integrated building simulation environment."Building and Environment 32.3 (1997) 219-224. DOI
Hong, Tianzhen, and Yi Jiang."A new multizone model for simulation of building thermal performance."Building and Environment 32.2 (1997) 123-128. DOI

1995

Jiang, Yi, and Tianzhen Hong."Integrated building design system."HV&AC, in Chinese (1995).
Hong, Tianzhen, and Yi Jiang."Prediction of building thermal performance under random conditions."TSINGHUA-HVAC-'95 (1995).
Hong, Tianzhen, and Yi Jiang."Stochastic weather model for building HVAC systems."Building and Environment 30.4 (1995) 521-532. DOI

1993

Jiang, Yi, and Tianzhen Hong."Stochastic analysis of building thermal processes."Building and Environment 28.4 (1993) 209-218. DOI
Jiang, Yi, and Tianzhen Hong."Stochastic analysis of overheating risk in buildings."CLIMA 2000 (1993).

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