Demonstration Program for Low-Cost, High-Energy-Saving Dynamic Windows

Inefficient windows in buildings represent one of the biggest energy problems in the military today. Facilities consume 30 of all U.S. Department of Defense DoD energy demand. This massive energy footprint costs taxpayers billions of dollars each year and impacts DoD mission assurance by straining fragile public electricity grids. This ESTCP project demonstrated the benefits for DoD building energy efficiency by using dynamic windows, a new type of advanced Smart Window product, as compared to existing single pane windows or low-emissivity low-e. These smart windows can automatically tint and untint throughout the day to minimize solar heat-gain in the summer, maximize passive heating in the winter and maximize the use of natural daylighting throughout the year. If broadly adopted, View s dynamic windows technology could reduce global DoD energy consumption from buildings by 15 and greenhouse gas GHG emissions by 24, representing an annual savings of 680M. At the same time, replacing existing windows with dynamic windows can reduce total facilities peak load by up to 25, reducing strain on local electrical grid infrastructure, further improving energy security. Overall, the dynamic window technology addresses two of DoD s three key installation energy goals, to 1 reduce energy usageintensity and 2 improve energy security. The goal of this project was to validate the performance and life-cycle cost benefits of dynamic windows in an operational environment, generating the data and insights needed to create awareness and acceptance of the technology. The project was intended to facilitate future technology transfer across all DoD building-stock, while providing a direct benefit to our host base in terms of reduced energy consumption, reduced life-cycle cost, and improved occupant comfort.