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.

Publications

Publications By Research Area

1999

Walker, Iain S."Distribution System Leakage Impacts on Apartment Building Ventilation Rates."ASHRAE Transactions 105 (1999) 943-950.

Walker, Iain S, Max H Sherman, Jeffrey A Siegel, Duo Wang, Christopher R Buchanan, and Mark P Modera."Leakage Diagnostics, Sealant Longevity, Sizing and Technology Transfer in Residential Thermal Distribution Systems; Part II." (1999).

Walker, Iain S, Max H Sherman, and Jeffrey A Siegel."Distribution Effectiveness and Impacts on Equipment Sizing for Residential Thermal Distribution Systems." (1999).

1998

Sherman, Max H, and Iain S Walker."Can Duct-Tape Take the Heat?."Home Energy 15 (1998) 14.

Walker, Iain S, and David J Wilson."Field Validation of Equations for Stack and Wind Driven Air Infiltration Calculations."ASHRAE HVAC&R Research Journal 4.2 (1998) 119-140.

Walker, Iain S, David J Wilson, and Max H Sherman."A Comparison of the Power Law to Quadratic Formulations for Air Infiltration Calculations."Energy and Buildings 27 (1998) 293-299.

Walker, Iain S, and Mark P Modera."Field Measurements of the Interactions between Furnaces and Forced Air Distribution Systems."ASHRAE Transactions 104 (1998) 1805-1816.

Walker, Iain S, and David J Wilson."Field Validation of Algebraic Equations for Stack and Wind Driven Air Infiltration Calculations."HVAC&R Research 4 (1998) 119-139.

Walker, Iain S, Max H Sherman, Mark P Modera, and Jeffrey A Siegel."Leakage Diagnostics, Sealant Longevity, Sizing and Technology Transfer in Residential Thermal Distribution Systems." (1998).

Walker, Iain S, Jeffrey A Siegel, Karl A Brown, and Max H Sherman."Saving Tons at the Register."Proceedings of the 1998 ACEEE Summer Study on Energy Effciency in Buildings, Pacific Grove, CA 1 (1998) 367-383.

Walker, Iain S."Technical Background for Default Values used for Forced Air Systems in Proposed ASHRAE Standard 152P."ASHRAE Transactions 104.1A (1998) 1360-1375.

1997

Saïd, M. Nady A, William C Brown, and Iain S Walker."Long Term Monitoring of an EIFS Clad Wall."Journal of Thermal Insulation and Building Envelopes 20 (1997) 320-338.

1996

Walker, Iain S, David J Wilson, and Tom W Forest."A Wind Shadow Model for Air Infiltration Sheltering by Upwind Obstacles."ASHRAE HVAC&R Research Journal 2.4 (1996) 265-283.

Walker, Iain S, Mark P Modera, Adrian Tuluca, and Ian Graham."Energy effectiveness of duct sealing and insulation in two multifamily buildings."Proceedings of the 1996 ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, CA 1 (1996) 247-254.

Jump, David A, Iain S Walker, and Mark P Modera."Field Measurements of Efficiency and Duct Retrofit Effectiveness in Residential Forced Air Distribution Systems."Proceedings of the 1996 ACEEE Summer Study on Energy Efficiency in Buildings, Pacific Grove, CA 1 (1996) 147-156.

1995

Walker, Iain S, Tom W Forest, and David J Wilson."A Simple Calculation Method for Attic Ventilation Rates."Proceedings of the 16th AIVC Conference 1 (1995) 221-232.

Walker, Iain S, and Tom W Forest."Field Measurements of Ventilation Rates in Attics."Building and Environment 30.3 (1995) 333-347.

1994

Walker, Iain S, and David J Wilson."Practical Methods for Improving Estimates of Natural Ventilation Rates."15th AIVC Conference: The Role of Ventilation (Best Paper Award) 1 (1994) 517-526.

1993

Forest, Tom W, and Iain S Walker."Moisture Dynamics in Residential Attics."Proceedings CANCAM '93 (1993).

Walker, Iain S, and David J Wilson."Evaluating Models for Superposition of Wind and Stack Effects in Air Infiltration."Building and Environment 28.2 (1993) 201-210.

Forest, Tom W, and Iain S Walker."Attic Ventilation and Moisture." (1993).

Walker, Iain S."Attic Ventilation, Heat and Moisture Transfer."Department of Mechanical Engineering Ph.D. (1993).

Wilson, David J, and Iain S Walker."Infiltration Data From the Alberta Home Heating Research Facility."AIVC Technical Note 41 (1993).

1992

Wilson, David J, and Iain S Walker."Feasibility of Passive Ventilation by Constant Area Vents to Maintain Indoor Air Quality in Houses."Proceedings Indoor Air Quality '92, ASHRAE/ACGIH/AIHA Conf., San Francisco, October 1992. (1992).

Forest, Tom W, and Iain S Walker."Attic Ventilation Model."Proceedings ASHRAE/DOE/BTECC 5th Conf. on Thermal Performance of Exterior Envelopes of Buildings (1992) 399-408.