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.
- Presentations
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

2005

Walker, Iain S, and Max H Sherman."Duct Tape and Sealant Performance."ASHRAE Journal 47 (2005) 34-41.

Walker, Iain S, and James D Lutz."Laboratory Evaluation of Residential Furnace Blower Performance." (2005).

Walker, Iain S."State-of-the-art in Residential and Small Commercial Air Handler Performance." (2005).

Dickerhoff, Darryl J, Iain S Walker, and Max H Sherman."Validating and Improving the DeltaQ Duct Leakage Test."ASHRAE Transactions 110 - Pt. 2 (2005) 741-751.

2004

McWilliams, Jennifer A, and Iain S Walker."A systems approach to retrofiting residential HVAC systems."2004 ACEEE Summer Study on Energy Efficiency in Buildings 11 (2004) 119-129.

Walker, Iain S."Best practices guide for residential HVAC retrofits." (2004).

Abushakra, Bass, Iain S Walker, and Max H Sherman."Compression Effects on Pressure Loss in Flexible HVAC Ducts."HVAC&R Research Journal 10 (2004) 275-290.

Sherman, Max H, and Iain S Walker."Duct Tape Durability Testing." (2004).

Walker, Iain S."Improving Air Handler Efficiency in Houses."ACEEE Summer Study on Energy Efficiency in Buildings 1 (2004) 341-352.

Walker, Iain S, Max H Sherman, and Darryl J Dickerhoff."Reducing Uncertainty for the DeltaQ Duct Leakage Test." (2004).

Walker, Iain S, and Max H Sherman."What's Up With Duct Tape?."Home Energy 21 (2004).

2003

Walker, Iain S."Garbage Bags and Laundry Baskets."Home Energy Magazine 20.6 November/December (2003).

Walker, Iain S, and Michael D Mingee."Reducing Air Handler Electricity Use: More Than Just a Better Motor."Home Energy Magazine 20.6 November/December (2003).

Walker, Iain S, Craig P Wray, Cyril Guillot, and Sylvain Masson."Evaluation of Commercially Available Techniques and Development of Simplified Methods for Measuring Grille Airflows in HVAC Systems." (2003).

Walker, Iain S, Douglas E Brenner, Max H Sherman, and Darryl J Dickerhoff."Evaluation of PEGIT Duct Connection System." (2003).

Wray, Craig P, Iain S Walker, and Max H Sherman."Guidelines for Residential Commissioning." (2003).

Wray, Craig P, Iain S Walker, and Max H Sherman."Instrumented Home Energy Rating and Commissioning." (2003).

Sherman, Max H, and Iain S Walker."Advanced Duct Sealant Testing." (2003).

Walker, Iain S, Jennifer A McWilliams, and Steven J Konopacki."Case Study Field Evaluation of a Systems Approach to Retrofitting a Residential HVAC System." (2003).

Walker, Iain S, and Craig P Wray."Evaluation of Flow Capture Techniques for Measuring HVAC Grille Airflows."ASHRAE Transactions 109 (2003).

Walker, Iain S, and Cyril Guillot."Experimental Evaluation of Gas Filled Plenum Duct Insulation." (2003).

Walker, Iain S, and Max H Sherman."Heat Recovery in Building Envelopes." (2003).

Walker, Iain S, Michael D Mingee, and Douglas E Brenner."Improving Air Handler Efficiency in Residential HVAC Applications." (2003).

Siegel, Jeffrey A, and Iain S Walker."Integrating ducts into the conditioned space: Successes and challenges."Architectural Engineering Institute Conference, Austin, TX (2003).

Wray, Craig P, Iain S Walker, Jeffrey A Siegel, and Max H Sherman."Practical Diagnostics for Evaluating Residential Commissioning Metrics."Lawrence Berkeley National Laboratory Report to the California Energy Commission (2003).