; (ii) a non-ferrous building material, including— (I) aluminum and poly­vi­nyl­chlo­ride; (II) glass; (III) fiber optics; (IV) plastic; (V) wood; (VI) masonry; (VII) rubber; (VIII) manufactured stone; and (IX) any other non-ferrous building materials; and (iii) any unmanufactured construction material. (B) Produced in the United States (i) In general The term produced in the United States — (I) with respect to an iron or steel product, means that all manufacturing processes for such iron or steel products, from the initial melting stage through the application of coatings, occurred in the United States; and (II) with respect to a manufactured product, means that the manufactured product was manufactured in the United States and the cost of the components of the manufactured product that were mined, produced, or manufactured in the United States exceeds 60 percent of the cost of all the components of the manufactured product. (ii) Exclusions The term produced in the United States , with respect to an iron or steel product, does not include an iron or steel product that was manufactured— (I) abroad from semi-finished iron or steel from the United States; or (II) in the United States from semi-finished iron or steel of foreign origin. (2) Requirement Funds made available under the program may not be used for an energy efficiency improvement project unless all of the iron or steel products and manufactured products used in the project are produced in the United States. (3) Waiver (A) In general On request of the recipient of a grant under the program, the Secretary may grant a waiver of the requirement described in paragraph (2) if the Secretary finds that— (i) the application of paragraph (2) would be inconsistent with the public interest; (ii) iron or steel products, or manufactured products, are not produced in the United States— (I) in sufficient and reasonably available quantities; or (II) of a satisfactory quality