# Phenolic insulation board and bunstock — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)

For Phenolic insulation board and bunstock, restriction type is manufacture/import; maximum gwp is 150; effective date is January 1, 2025; conditions is foam products; cfr paragraph is § 84.54(a)(14)(v), recorded from its source on 2026-08-06.

- **Sector/subsector:** Phenolic insulation board and bunstock _(verified: appears in the quote below)_
- **Restriction type:** manufacture/import _(our reading, not quoted from the source)_
- **Maximum GWP:** 150 _(verified: appears in the quote below)_
- **Effective date:** January 1, 2025 _(verified: appears in the quote below)_
- **Conditions:** foam products _(verified: appears in the quote below)_
- **CFR paragraph:** § 84.54(a)(14)(v) _(our reading, not quoted from the source)_

## What the source says

> ( 14 ) Effective January 1, 2025, foam products (but not including foam products in <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(15)> paragraph (a)(15) of this section) in the following subsectors using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater: ( i ) Rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, and slabstock; ( ii ) Flexible polyurethane; ( iii ) Integral skin polyurethane; ( iv ) Polystyrene—extruded boardstock, billet, and extruded sheet; ( v ) Phenolic insulation board and bunstock;

## Source

- https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84

Last verified: 2026-08-06. Review by: 2027-02-02.
Part of [US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)](https://referencesource.org/aim-act-refrigerant-gwp-sector-limits/).