CREDIT FOR NON-BUSINESS ENERGY PROPERTY § 25C: Eligibility Requirements for the Tax Credit The Credit for Non-Business Energy Property as outlined in § 25C of the Internal Revenue Code allows for a credit for building products classified as an "Eligible Building Envelope Component." Eligible Building Envelope Component(s): 1) An insulation material or system specifically and primarily designed to reduce heat loss or gain of a dwelling unit when installed in or on the dwelling unit. 2) An exterior window or door that meets or exceeds the prescriptive criteria established by the IECC for the climate zone in which the window or door is installed. Note: A taxpayer may treat an exterior window that bears an ENERGY STAR® label and is installed in the region identified on the label, as an Eligible Building Envelope Component and may rely on such ENERGY STAR® label, rather than on a manufacturer’s certification statement, in claiming the § 25C credit. This tax credit applies to the following product categories from Gentek. Please click the applicable link below to learn more about the eligibility requirements for each individual product and to download your manufacturer’s certificate: ENERGY STAR® Exterior Windows and Patio Doors Dealers and other professionals, please click here for information about the tax credit. The Energy Tax Credit information contained on this web site is not complete or comprehensive. For the entire scope of information about the Credit for Non-Business Energy Property § 25C, please visit: http://www.irs.gov/pub/irs-drop/n-06-26.pdf.