IB 
Union Calendar No. 411 
119TH CONGRESS 
2D SESSION 
H. R. 3474 
[Report No. 119–481] 
To clarify that the installation of mechanical insulation property is 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. 
IN THE HOUSE OF REPRESENTATIVES 
MAY 15, 2025 
Mr. WEBER of Texas (for himself and Ms. SA´NCHEZ) introduced the following 
bill; which was referred to the Committee on Energy and Commerce 
FEBRUARY 4, 2026 
Additional sponsors: Mr. LAWLER, Ms. SCHOLTEN, Mrs. TORRES of Cali-
fornia, Mr. FITZPATRICK, Mr. BILIRAKIS, Mr. GARBARINO, Mr. TONKO, 
Ms. BUDZINSKI, Ms. KELLY of Illinois, Ms. SCHAKOWSKY, Mrs. MILLER 
of Illinois, Mr. BABIN, Mr. BACON, Mr. GIMENEZ, Mrs. MILLER-MEEKS, 
Mrs. FLETCHER, Ms. SCHRIER, Mr. MURPHY, Mr. MULLIN, Ms. 
BARRAGA´N, Mr. DAVIS of Illinois, Ms. MOORE of Wisconsin, Mr. NEHLS, 
Mr. TURNER of Ohio, Mr. VINDMAN, Mr. MESSMER, Mrs. DINGELL, Mr. 
DAVIS of North Carolina, Mr. KEAN, Mr. HUDSON, Mr. MAGAZINER, Mr. 
CARTER of Louisiana, Mr. WITTMAN, Mr. SMITH of New Jersey, and Mr. 
GRIFFITH 
FEBRUARY 4, 2026 
Committed to the Committee of the Whole House on the State of the Union 
and ordered to be printed 
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A BILL 
To clarify that the installation of mechanical insulation prop-
erty is 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. 
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00:07 Feb 05, 2026
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Be it enacted by the Senate and House of Representa-
tives of the United States of America in Congress assembled, 
SECTION 1. SHORT TITLE. 
This Act may be cited as the ‘‘Federal Mechanical 
Insulation Act’’. 
SEC. 2. INSTALLATION OF MECHANICAL INSULATION PROP-
ERTY AS AN ENERGY OR WATER EFFICIENCY 
MEASURE IN FEDERAL BUILDINGS. 
(a) DEFINITION OF MECHANICAL INSULATION PROP-
ERTY.—Section 543(f)(1) of the National Energy Con-
servation Policy Act (42 U.S.C. 8253(f)(1)) is amended 
by adding at the end the following: 
‘‘(I) 
MECHANICAL
INSULATION
PROP-
ERTY.—The term ‘mechanical insulation prop-
erty’ means insulation materials, facings, and 
accessory products— 
‘‘(i) placed in service— 
‘‘(I) in connection with a me-
chanical system; and 
‘‘(II) in a manner that meets or 
exceeds the minimum requirements of 
the American Society of Heating, Re-
frigerating and Air-Conditioning En-
gineers Standard 90.1, as in effect on 
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the date of enactment of this subpara-
graph; and 
‘‘(ii) which result in a reduction in en-
ergy loss from the mechanical system.’’. 
(b) COMPREHENSIVE ENERGY AND WATER EVALUA-
TIONS.—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 the installation of 
mechanical insulation property, if applicable),’’ after ‘‘a 
comprehensive energy and water evaluation’’. 
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Union Calendar No. 411 
119TH CONGRESS 
2D SESSION 
H. R. 3474 
[Report No. 119–481] 
A BILL 
To clarify that the installation of mechanical insu-
lation property is 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. 
FEBRUARY 4, 2026 
Committed to the Committee of the Whole House on the 
State of the Union and ordered to be printed 
VerDate Sep 11 2014 
00:07 Feb 05, 2026
Jkt 069200
PO 00000
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