Building Envelope

The Green Proving Ground program has commissioned Department of Energy National Laboratories to perform real-world measurement and verification of the following technologies in pilot installations in federally-owned buildings. Preliminary technology assessments are available below as PDFs.


Preliminary Technology Assessments

In the News: From the 2015 Program Lineup

Daylight Redirecting Window Film > This film redirects daylight that enters through the upper portion of windows to the ceiling, where it is reflected and diffused deeper into interior workspaces. DRF has the potential to improve workspace daylighting while reducing glare. Findings available in 2017.


Electrochromic Windows with Dynamic Controls > In GPG’s ongoing exploration of EC windows, dynamic controls introduce the ability for auto-tinting windows to learn from occupancy patterns and individual preferences to improve user satisfaction and environmental quality. Findings available in 2016.

Low-Emissivity Window Film > This film makes it possible achieve low-e glazing characteristics without heavy manufacturing or full window replacement. Findings available in 2016.

Electrochromic Windows > Electrochromic (EC) windows switch from a clear to dark state with a small applied voltage, and promise to optimize daylighting, visual comfort, and solar heat gains without the need for blinds. Window tinting can be controlled manually (using a button or switch), or by an automated building control system, which programs sensors to respond to changing sunlight levels and heat conditions. Findings available in 2016.


The Green Proving Ground program leverages GSA’s real estate portfolio to test innovative building technologies and provide recommendations on their deployment.


Last Reviewed 2015-10-05