I 118th CONGRESS 1st Session H. R. 4663 IN THE HOUSE OF REPRESENTATIVES July 14, 2023 Mr. Weber of Texas (for himself and Ms. Sánchez ) introduced the following bill; which was referred to the Committee on Energy and Commerce A BILL To clarify that installation of mechanical insulation property is as an energy or water efficiency measure that may be used in Federal buildings for purposes of section 543(f) of the National Energy Conservation Policy Act, and for other purposes.

1. Short title This Act may be cited as the Federal Mechanical Insulation Act . 2. Installation of mechanical insulation property as an energy or water efficiency measure in Federal buildings (a) Definition of mechanical insulation property Section 543(f)(1) of the National Energy Conservation Policy Act ( 42 U.S.C. 8253(f)(1) ) is amended by adding at the end the following: (I) Mechanical insulation property The term mechanical insulation property means insulation materials, facings, and accessory products installed in connection to such insulation materials— (i) placed in service— (I) in connection with a mechanical system; and (II) in a manner that meets or complies with the minimum requirements of Reference Standard 90.1 (as defined in section 179D(c)(2) of the Internal Revenue Code of 1986); and (ii) which result in a reduction in energy loss from the mechanical system. . (b) Comprehensive energy and water evaluations Section 543(f)(3)(A) of the National Energy Conservation Policy Act ( 42 U.S.C. 8253(f)(3)(A) ) is amended by inserting , including identification of energy- and water-saving measures (including installation of mechanical insulation property, if applicable), after a comprehensive energy and water evaluation .