# Industrial process refrigeration systems, other than chiller systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)

For Industrial process refrigeration systems, other than chiller systems, restriction type is installation; maximum gwp is 700; effective date is January 1, 2028; conditions is where the temperature of the refrigerant entering the evaporator is greater than or equal to −50 °C (−58 °F) and is less than or equal to −30 °C (−22 °F); cfr paragraph is § 84.54(c)(10)(iv), recorded from its source on 2026-08-06.

- **Sector/subsector:** Industrial process refrigeration systems, other than chiller systems _(verified: appears in the quote below)_
- **Restriction type:** installation _(our reading, not quoted from the source)_
- **Maximum GWP:** 700 _(verified: appears in the quote below)_
- **Effective date:** January 1, 2028 _(verified: appears in the quote below)_
- **Conditions:** where the temperature of the refrigerant entering the evaporator is greater than or equal to −50 °C (−58 °F) and is less than or equal to −30 °C (−22 °F) _(verified: appears in the quote below)_
- **CFR paragraph:** § 84.54(c)(10)(iv) _(our reading, not quoted from the source)_

## What the source says

> ( 10 ) Industrial process refrigeration systems, other than chiller systems, as follows: ( i ) Effective January 1, 2026, systems with a refrigerant charge capacity of 200 pounds or greater and with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F), that are not the high temperature side of a cascade system, using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater; ( ii ) Effective January 1, 2026, systems with a refrigerant charge capacity less than 200 pounds and with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F), using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; ( iii ) Effective January 1, 2026, the high temperature side of cascade systems with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F) using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; ( iv ) Effective January 1, 2028, where the temperature of the refrigerant entering the evaporator is greater than or equal to −50 °C (−58 °F) and is less than or equal to −30 °C (−22 °F), using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater; and

## 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/).