H.R. 3474Heading to a voteEnvironment & energy
Bill would count pipe and duct insulation as federal energy upgrade
Data as of July 11, 2026
The bill formally defines mechanical insulation as an approved energy or water efficiency upgrade for federal buildings.40-second read · 4 questions answered below
Decoded
What does this do?
The bill amends federal energy law to officially recognize insulation on mechanical systems, such as pipes, ducts, and heating or cooling equipment, as an approved energy or water efficiency measure. It adds a definition requiring the insulation to meet industry standards set by ASHRAE and to reduce energy loss. It also requires federal agencies to specifically evaluate this insulation as an option during their regular building energy and water assessments.
Who does it affect?
The bill affects federal agencies that own or manage government buildings, along with contractors and companies that manufacture or install mechanical insulation products.
Why does it matter?
Requiring agencies to consider insulation upgrades during evaluations could lead to more federal buildings adopting this measure, changing standard assessment practices for facility managers and inspectors.
Where does it stand?
- Introduced
- House committee
- House vote — You are here
- Senate
- President's desk
Right now: it's headed for a House floor vote. If the Senate changes it, it goes back to the House before reaching the President.
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Official title
Federal Mechanical Insulation Act
- Introduced:
- May 15, 2025
- Latest action:
- February 4, 2026
Placed on the Union Calendar, Calendar No. 411.
Read the official bill on Congress.govMake the call
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