# 119-s-4312: Federal Mechanical Insulation Act of 2026

119-s-4312, Federal Mechanical Insulation Act of 2026, is a 119th Congress bill sponsored by Sen. Cortez Masto, Catherine [D-NV] (D-NV); status introduced; PRIA reads it as touching household money (as of 2026-09-10).

- Canonical: https://policyrisk.com/legislation/119-s-4312
- As of: 2026-09-10
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: 119-s-4312
- Congress: 119
- Title: Federal Mechanical Insulation Act of 2026
- Status: introduced
- Introduced: 2026-04-16
- Sponsor: Sen. Cortez Masto, Catherine [D-NV] (D-NV)
- Cosponsors: 3
- Policy area: Energy
- Touches household money: yes
- Last recorded action: 2026-09-10

## Summary

This bill would add a formal definition of **mechanical insulation property** to federal energy law and make it an eligible energy- and water-saving measure for federal buildings. It would require the insulation to meet or exceed ASHRAE Standard 90.1 as of enactment and to reduce energy loss from mechanical systems. - Federal facility managers would have mechanical insulation explicitly listed in comprehensive energy and water evaluations, so insulation options must be identified during routine audits. - Energy auditors and contractors would need to confirm that proposed insulation meets ASHRAE 90.1 as of enactment and demonstrably reduces energy loss before recommending installations. - Manufacturers and installers would gain clearer eligibility for inclusion in federal energy-efficiency projects and building upgrades, since the measure is now defined in the federal framework.

## Cosponsors (3)

- Sen. Daines, Steve [R-MT] (R-MT), 2026-04-16T00:00:00.000Z
- Sen. Murkowski, Lisa [R-AK] (R-AK), 2026-08-05T00:00:00.000Z
- Sen. Markey, Edward J. [D-MA] (D-MA), 2026-08-05T00:00:00.000Z

## Provisions PRIA read

- Mechanical insulation for federal buildings: benefit, medium. If enacted, the bill would add a new definition called “mechanical insulation property” to federal energy law. The definition would cover insulation material, facing, or accessory products placed into service with a mechanical system that meet or exceed ASHRAE Standard 90.1 as in effect on the date…

## Related bills

- 119-s-3940: Access to Fair Financing for Opportunity and Resilient Development Act
- 119-s-1261: CONNECT for Health Act of 2025
- 119-s-1289: 25th Anniversary of 9/11 Commemorative Coin Act
- 119-s-1032: Major Richard Star Act
- 119-s-315: AM Radio for Every Vehicle Act of 2025
- 119-s-1547: America the Beautiful Act

## Sources
- [119-s-4312 on Congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/4312)

## Related
- [119-s-3940: Access to Fair Financing for Opportunity and Resilient Development Act](https://policyrisk.com/legislation/119-s-3940)
- [119-s-1261: CONNECT for Health Act of 2025](https://policyrisk.com/legislation/119-s-1261)
- [119-s-1289: 25th Anniversary of 9/11 Commemorative Coin Act](https://policyrisk.com/legislation/119-s-1289)
- [119-s-1032: Major Richard Star Act](https://policyrisk.com/legislation/119-s-1032)
- [119-s-315: AM Radio for Every Vehicle Act of 2025](https://policyrisk.com/legislation/119-s-315)
- [119-s-1547: America the Beautiful Act](https://policyrisk.com/legislation/119-s-1547)
- [All bills in Congress](https://policyrisk.com/legislation)

Source: PRIA, https://policyrisk.com/legislation/119-s-4312 (as of 2026-09-10).