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​Low-emissivity (Low-e) windows use insulated glass with a special coating to reduce the amount of heat energy, or infrared radiation, that is transmitted through the window. Storm windows with low emissivity and high visible transmittance reduce heat loss in the winter and pass visible light into the building, preserving views and eliminating the gloom associated with alternative methods, such as insulating shades.
BPA is currently offering incentives for retrofit applications in single-family, multi-family, and manufactured housing. Attachments Energy Rating Council (AERC) certification and ENERGY STAR specification are expected in 2017.

Current Stage: Approved for Implementation. See BPA Energy Efficiency Implementation Manual for measure and program details.
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