DECEMBER 2013
Hi-R Low-E Window Retrofit System

Researchers from the Lawrence Berkeley National Laboratory (LBNL) found that high-performance or “Hi-R” windows use advanced technology to deliver up to a seven-fold improvement in a window’s thermal performance. 

At a GSA test bed location in Provo, Utah, Hi-R panel retrofits, which are installed on top of existing windows, reduced heating loads by up to 41%.

Download Findings

• 1-page infographic

• 4-page brief

• LBNL full report

View Webinar

• On-demand video

• Slides

Additional Resources

• Newsletter: Focus on Hi-R Low-E Window Panels (May 2018)

• Case Study: Evaluation of Low-E Storm Windows in the PNNL Lab Homes (PNNL, May 2014)

• Case Study: Energy Savings of Low-E Storm Windows and Panels across US Climate Zones (PNNL, October 2015)