We are pleased to inform you that the U.S. Department of Energy (DOE) has released the April 2012 edition of the report titled: “Buildings R&D Breakthroughs: Technologies and Products Supported by the Building Technologies Program”.
This report is intended to inform government professionals, architects, designers, manufacturers, and energy efficiency advocates about DOE project successes and next-generation innovations.
The Pacific Northwest National Laboratory Building Technologies Program Tracking Team would like to thank you for your input and contribution to the 2012 edition of this report.
The technology arising from your project, EnerLogic®: Low-Emissivity, Energy-Control Retrofit Window Film.

Technology History:
Available from Solutia Inc.
Commercialized in 2011.
Over one million square feet installed.

Can be used for commercial or residential windows.

Can be installed in existing low-e commercial or residential windows(single or dual pane and tinted or clear).
Improves energy efficiency of existing windows.
Achieves a 3.5 times reduction of window emissivity to less than 0.1.

Cost Savings Reduces first cost by eliminating costly re-installation or replacement of existing windows.

Improves product durability and flexibility using flexible display manufacturing techniques combined with precious metal sputter coating.

Energy Efficiency:
Improves window energy efficiency using reduced emissivity film coating and becomes energy neutral in less than two months of use.

Approximately one third of the energy used for heating and cooling U.S. homes is lost through windows.

Research and development to improve energy conservation in windows have investigated fenestration, glazing, and glazing treatments, including active and passive window tinting For a technology to become successful in the consumer marketplace, cost of ownership must have a perceived value and a short payback period Also, a technology that can be easily retrofitted and cost effective is desirable Currently, the best retrofit window film technology available has an emissivity >0.35 Suspended films have been used in the air gap of dual pane window units but proved to be uneconomical and
a low-impact retrofit solution. Emissivity values as low as 0.02 are available in glass coatings found inside the air gap of sealed, dual-pane windows but cannot be a retrofitted and therefore are expensive. Low-emissivity coating technologies cannot be directly applied into an aftermarket window film due to processing issues as well as substrate flexibility, corrosion, and abrasion resistance.

Solutia Inc., with funding from the U.S. Department of Energy’s Buildings Technologies Program (as part of the American Recovery and Reinvestment Act), developed a retrofit window film technology, Enerlogic, with improved
Emissivity. The technology uses sputter coating processes from a flexible touch panel and display manufacturing, preventing damage and maintaining the film’s flexibility. To improve abrasion resistance, acrylic coatings cannot be used because they increase emissivity, cause iridescence, and are opaque in the far infrared (IR) spectrum. Solutia’s new abrasion resistant technology is flexible, IR transmissive, and eco-lighting friendly. The products’ low emissivity decreases the energy payback period, making them suitable for a wider range of climates. Solutia has several commercial building window and residential
window products available with various light transmission and emissivity specifications, depending on the intended application. Solutia distributes their products through a national dealer/installer network and has successfully
demonstrated their products at over 60 commercial and residential case study sites.