Federal sector-specific maximum GWP values for refrigerants and HFC-containing products under the AIM Act Technology Transitions rule (40 CFR 84.54). Each record is one sector/subsector with the GWP ceiling, the effective date for manufacture/import restrictions, the effective date for installation restrictions (often different), equipment size or temperature conditions, and any exemptions. Answers 'what is the maximum GWP refrigerant I can use in a new supermarket system?', 'when does the R-410A ban take effect for residential AC?', 'is there an exemption for semiconductor manufacturing chillers?', and 'what changed in the May 2026 reconsideration rule?' — questions where the answer depends on the sector, the date, the equipment size, and the temperature range, and where assistants typically give the residential AC answer (700 GWP) regardless of the sector.

US federal regulation, public domain. 40 CFR Part 84 is government work published at ecfr.gov.

US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** self-contained residential and light commercial air conditioning and heat pump products

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(a)(1)

> ( 1 ) Effective January 1, 2025, self-contained residential and light commercial air conditioning and heat pump products using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

self-contained residential and light commercial air conditioning and heat pump products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for comfort cooling

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**Conditions:** when a stand-alone product

**CFR paragraph:** § 84.54(a)(10)(i)

> ( 10 ) Chillers, when a stand-alone product, as follows: ( i ) Effective January 1, 2025, chillers for comfort cooling using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

chillers for comfort cooling — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for ice rinks

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**Conditions:** when a stand-alone product

**CFR paragraph:** § 84.54(a)(10)(ii)

> ( 10 ) Chillers, when a stand-alone product, as follows: ( i ) Effective January 1, 2025, chillers for comfort cooling using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater; ( ii ) Effective January 1, 2025, chillers for ice rinks using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

chillers for ice rinks — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for industrial process refrigeration

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2026

**Conditions:** where the temperature of the fluid exiting the chiller is greater than −22 °F (−30 °C)

**CFR paragraph:** § 84.54(a)(10)(iii)

> ( iii ) Effective January 1, 2026, chillers for industrial process refrigeration where the temperature of the fluid exiting the chiller is greater than −22 °F (−30 °C) using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

chillers for industrial process refrigeration — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for industrial process refrigeration

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2028

**Conditions:** where the temperature of the fluid exiting the chiller is greater than or equal to −50 °C (−58 °F) and less than or equal to −30 °C (−22 °F)

**CFR paragraph:** § 84.54(a)(10)(iv)

> ( iv ) Effective January 1, 2028, chillers for industrial process refrigeration where the temperature of the fluid exiting the chiller is greater than or equal to −50 °C (−58 °F) and 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>


**Sector/subsector:** Chillers

**Restriction type:** manufacture/import

**Effective date:** January 1, 2030

**Conditions:** with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors

**CFR paragraph:** § 84.54(a)(10)(v)

> ( v ) Chillers subject to <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(10)(iii)> paragraph (a)(10)(iii) or <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(10)(iv)> (iv) of this section with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors must comply with the restrictions of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(10)(iii)> paragraph (a)(10)(iii) or <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(10)(iv)> (iv) of this section by January 1, 2030.

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

Chillers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** self-contained products in data center, information technology equipment facility, and computer room cooling

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2027

**CFR paragraph:** § 84.54(a)(11)

> ( 11 ) Effective January 1, 2027, self-contained products in data center, information technology equipment facility, and computer room cooling using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

self-contained products in data center, information technology equipment facility, and computer room cooling — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Industrial process refrigeration products, other than chillers

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2026

**Conditions:** with a refrigerant charge capacity of 200 pounds or greater and with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F)

**CFR paragraph:** § 84.54(a)(12)(i)

> ( 12 ) Industrial process refrigeration products, other than chillers, as follows: ( i ) Effective January 1, 2026, products with a refrigerant charge capacity of 200 pounds or greater 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 150 or greater;

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

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


**Sector/subsector:** Industrial process refrigeration products, other than chillers

**Restriction type:** manufacture/import

**Maximum GWP:** 300

**Effective date:** January 1, 2026

**Conditions:** with a refrigerant charge capacity less than 200 pounds and with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F)

**CFR paragraph:** § 84.54(a)(12)(ii)

> ( 12 ) Industrial process refrigeration products, other than chillers, as follows: ( i ) Effective January 1, 2026, products with a refrigerant charge capacity of 200 pounds or greater 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 150 or greater; ( ii ) Effective January 1, 2026, products 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;

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


**Sector/subsector:** Industrial process refrigeration products, other than chillers

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2028

**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)

**CFR paragraph:** § 84.54(a)(12)(iii)

> ( 12 ) Industrial process refrigeration products, other than chillers, as follows: ( i ) Effective January 1, 2026, products with a refrigerant charge capacity of 200 pounds or greater 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 150 or greater; ( ii ) Effective January 1, 2026, products 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, 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;

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


**Sector/subsector:** Industrial process refrigeration products, other than chillers

**Restriction type:** manufacture/import

**Effective date:** January 1, 2030

**Conditions:** with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors

**CFR paragraph:** § 84.54(a)(12)(iv)

> ( 12 ) Industrial process refrigeration products, other than chillers, as follows: ( i ) Effective January 1, 2026, products with a refrigerant charge capacity of 200 pounds or greater 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 150 or greater; ( ii ) Effective January 1, 2026, products 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, 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; ( iv ) Products subject to <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(ii)> paragraph (a)(12)(ii) or <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(iii)> (iii) of this section with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors must comply with the restrictions of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(ii)> paragraph (a)(12)(ii) or <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(iii)> (iii) of this section by January 1, 2030; and

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


**Sector/subsector:** Refrigerated centrifuges and laboratory shaker tables

**Restriction type:** manufacture/import

**Effective date:** January 1, 2028

**CFR paragraph:** § 84.54(a)(12)(v)

> ( v ) Refrigerated centrifuges and laboratory shaker tables subject to <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(i)> paragraph (a)(12)(i) or <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(ii)> (ii) of this section must comply with the restrictions of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(i)> paragraphs (a)(12)(i) and <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(12)(ii)> (ii) of this section by January 1, 2028.

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

Refrigerated centrifuges and laboratory shaker tables — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Motor vehicle air-conditioning

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** October 24, 2024

**Conditions:** for Model Year 2025 and subsequent model year light-duty passenger cars and trucks (vehicles with a gross vehicle weight rating less than 8,500 lb)

**CFR paragraph:** § 84.54(a)(13)(i)

> ( 13 ) Motor vehicle air-conditioning as follows: ( i ) Effective October 24, 2024, for Model Year 2025 and subsequent model year light-duty passenger cars and trucks (vehicles with a gross vehicle weight rating less than 8,500 lb) using or intended to use a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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

Motor vehicle air-conditioning — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Motor vehicle air-conditioning

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** Model Year 2028

**Conditions:** medium-duty passenger vehicles, heavy-duty pick-up trucks, and complete heavy-duty vans, as defined by the Federal Highway Administration

**CFR paragraph:** § 84.54(a)(13)(ii)

> ( 13 ) Motor vehicle air-conditioning as follows: ( i ) Effective October 24, 2024, for Model Year 2025 and subsequent model year light-duty passenger cars and trucks (vehicles with a gross vehicle weight rating less than 8,500 lb) using or intended to use a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater; ( ii ) For Model Year 2028 and subsequent model year medium-duty passenger vehicles, heavy-duty pick-up trucks, and complete heavy-duty vans, as defined by the Federal Highway Administration at <https://www.ecfr.gov/current/title-40/section-86.1803-01> 40 CFR 86.1803-01 , which have air conditioning equipment that will not be modified by upfitters using or intended to use a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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


**Sector/subsector:** Motor vehicle air-conditioning

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2028

**Conditions:** certain nonroad vehicles (agricultural tractors greater than 40 horsepower; self-propelled agricultural machinery; compact equipment; construction, forestry, and mining equipment; and commercial utility vehicles)

**CFR paragraph:** § 84.54(a)(13)(iii)

> ( iii ) Effective January 1, 2028, certain nonroad vehicles (agricultural tractors greater than 40 horsepower; self-propelled agricultural machinery; compact equipment; construction, forestry, and mining equipment; and commercial utility vehicles) using or intended to use a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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


**Sector/subsector:** Rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, and slabstock

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(i)

> ( 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;

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

Rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, and slabstock — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Flexible polyurethane

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(ii)

> ( 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;

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

Flexible polyurethane — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Integral skin polyurethane

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(iii)

> ( 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;

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

Integral skin polyurethane — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Polystyrene—extruded boardstock, billet, and extruded sheet

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(iv)

> ( 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;

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

Polystyrene—extruded boardstock, billet, and extruded sheet — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Phenolic insulation board and bunstock

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(v)

> ( 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>

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


**Sector/subsector:** Polyisocyanurate laminated boardstock

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(vi)

> ( 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; ( vi ) Polyisocyanurate laminated boardstock;

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

Polyisocyanurate laminated boardstock — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Polyolefin

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(vii)

> ( 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; ( vi ) Polyisocyanurate laminated boardstock; ( vii ) Polyolefin; and

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

Polyolefin — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Rigid polyurethane spray foam

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Conditions:** foam products

**CFR paragraph:** § 84.54(a)(14)(viii)

> ( 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; ( vi ) Polyisocyanurate laminated boardstock; ( vii ) Polyolefin; and ( viii ) Rigid polyurethane spray foam ( i.e., high-pressure two-component, low-pressure two-component, and one-component foam sealants).

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

Rigid polyurethane spray foam — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** foam products

**Restriction type:** manufacture/import

**Effective date:** January 1, 2026

**Conditions:** for use in space and military applications

**Exemptions:** except spray and pour foams that are for use in space vehicles

**CFR paragraph:** § 84.54(a)(15)

> ( 15 ) Effective January 1, 2026, foam products in the formulations specified in <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(14)(i)> paragraphs (a)(14)(i) through <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)(14)(viii)> (viii) of this section that are for use in space and military applications, except spray and pour foams that are for use in space vehicles as defined in <https://www.ecfr.gov/current/title-40/section-84.3> § 84.3 , which are not subject to a use restriction.

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

foam products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Aerosol products

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**Exemptions:** except products that use HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-pentafluoropentane) or HFC-245fa (1,1,1,3,3-pentafluoropropane) as an aerosol solvent

**CFR paragraph:** § 84.54(a)(16)(i)

> ( 16 ) Aerosol products as follows: ( i ) Effective January 1, 2025, all aerosol products using a regulated substance with a global warming potential of 150 or greater, except products that use HFC-43-10mee (1,1,1,2,3,4,4,5,5,5-pentafluoropentane) or HFC-245fa (1,1,1,3,3-pentafluoropropane) as an aerosol solvent, defense sprays as defined in <https://www.ecfr.gov/current/title-40/section-84.3> § 84.3 , or those that use HFC-134a in the following specific uses; ( A ) Cleaning products for removal of grease, flux and other soils from electrical equipment or electronics; ( B ) Refrigerant flushes; ( C ) Products for sensitivity testing of smoke detectors; ( D ) Lubricants and freeze sprays for electrical equipment or electronics; ( E ) Sprays for aircraft maintenance; ( F ) Sprays containing corrosion preventive compounds used in the maintenance of aircraft, electrical equipment or electronics, or military equipment; ( G ) Pesticides for use near electrical wires or in aircraft, in total release insecticide foggers, or in certified organic use pesticides for which EPA has specifically disallowed all other lower-GWP propellants; ( H ) Mold release agents and mold cleaners; ( I ) Lubricants and cleaners for spinnerets for synthetic fabrics; ( J ) Duster sprays specifically for removal of dust from photographic negatives, semiconductor chips, specimens under electron microscopes, and energized electrical equipment; ( K ) Adhesives and sealants in large canisters; ( L ) Document preservation sprays; ( M ) Wound care sprays; ( N ) Topical coolant sprays for pain relief; ( O ) Products for removing bandage adhesives from skin.

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

Aerosol products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** aerosol products

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2028

**Exemptions:** except defense sprays

**CFR paragraph:** § 84.54(a)(16)(ii)

> ( ii ) Effective January 1, 2028, all aerosol products using a regulated substance with a global warming potential of 150 or greater, except defense sprays as defined in <https://www.ecfr.gov/current/title-40/section-84.3> § 84.3 .

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

aerosol products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** residential dehumidifiers

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(a)(2)

> ( 2 ) Effective January 1, 2025, residential dehumidifiers using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

residential dehumidifiers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** household refrigerators and freezers

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(a)(3)

> ( 3 ) Effective January 1, 2025, household refrigerators and freezers using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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

household refrigerators and freezers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** retail food refrigeration—stand-alone units

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(a)(4)

> ( 4 ) Effective January 1, 2025, retail food refrigeration—stand-alone units using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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

retail food refrigeration—stand-alone units — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** vending machines

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(a)(5)

> ( 5 ) Effective January 1, 2025, vending machines using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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

vending machines — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** refrigerated transport—intermodal containers

**Restriction type:** manufacture/import

**Maximum GWP:** 700

**Effective date:** July 27, 2026

**Conditions:** with a box temperature of −35 °C (−31 °F) or higher

**CFR paragraph:** § 84.54(a)(6)

> ( 6 ) Effective July 27, 2026, refrigerated transport—intermodal containers with a box temperature of −35 °C (−31 °F) or higher using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater.

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

refrigerated transport—intermodal containers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** self-contained products in refrigerated transport—road and refrigerated transport—marine subsectors

**Restriction type:** manufacture/import

**Maximum GWP:** named list

**Effective date:** January 1, 2025

**Conditions:** R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5

**CFR paragraph:** § 84.54(a)(7)

> ( 7 ) Effective January 1, 2025, self-contained products in refrigerated transport—road and refrigerated transport—marine subsectors using any of the following: R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5;

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

self-contained products in refrigerated transport—road and refrigerated transport—marine subsectors — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Self-contained automatic commercial ice machines

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2026

**Conditions:** with a harvest rate less than or equal to 1,000 pounds of ice per 24 hours

**CFR paragraph:** § 84.54(a)(8)(i)(A)

> ( 8 ) Self-contained automatic commercial ice machines as follows: ( i ) Effective January 1, 2026, ice maker products with a harvest rate as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater as follows: ( A ) Batch type, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate less than or equal to 1,000 pounds of ice per 24 hours;

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

Self-contained automatic commercial ice machines — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Self-contained automatic commercial ice machines

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2026

**Conditions:** with a harvest rate less than or equal to 1,200 pounds of ice per 24 hours

**CFR paragraph:** § 84.54(a)(8)(i)(B)

> ( 8 ) Self-contained automatic commercial ice machines as follows: ( i ) Effective January 1, 2026, ice maker products with a harvest rate as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater as follows: ( A ) Batch type, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate less than or equal to 1,000 pounds of ice per 24 hours; ( B ) Continuous type, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate less than or equal to 1,200 pounds of ice per 24 hours;

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


**Sector/subsector:** batch type ice maker products

**Restriction type:** manufacture/import

**Maximum GWP:** named list

**Effective date:** January 1, 2027

**Conditions:** with a harvest rate greater than 1,000 pounds of ice per 24 hours

**CFR paragraph:** § 84.54(a)(8)(ii)

> ( ii ) Effective January 1, 2027, batch type ice maker products, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate greater than 1,000 pounds of ice per 24 hours, as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , and continuous type ice machine products, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate greater than 1,200 pounds of ice per 24 hours, as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , using any of the following: R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-428A, R-434A, R-437A, R-438A, R-442A, R-507A, HFC-134a, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, G2018C, or Freeze 12;

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

batch type ice maker products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** continuous type ice machine products

**Restriction type:** manufacture/import

**Maximum GWP:** named list

**Effective date:** January 1, 2027

**Conditions:** with a harvest rate greater than 1,200 pounds of ice per 24 hours

**CFR paragraph:** § 84.54(a)(8)(ii)

> ( ii ) Effective January 1, 2027, batch type ice maker products, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate greater than 1,000 pounds of ice per 24 hours, as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , and continuous type ice machine products, as defined in <https://www.ecfr.gov/current/title-10/section-431.132> 10 CFR 431.132 , with a harvest rate greater than 1,200 pounds of ice per 24 hours, as determined in accordance with <https://www.ecfr.gov/current/title-10/section-431.134> 10 CFR 431.134 , using any of the following: R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-428A, R-434A, R-437A, R-438A, R-442A, R-507A, HFC-134a, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, G2018C, or Freeze 12;

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

continuous type ice machine products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Self-contained refrigerated food processing and dispensing products

**Restriction type:** manufacture/import

**Maximum GWP:** 150

**Effective date:** January 1, 2027

**Conditions:** with refrigerant charge sizes less than or equal to 500 g

**CFR paragraph:** § 84.54(a)(9)(i)

> ( 9 ) Self-contained refrigerated food processing and dispensing products as follows: ( i ) Effective January 1, 2027, products outside the scope of UL 621, “Ice Cream Makers,” Edition 7, dated May 07, 2010, with revisions through September 16, 2020, as of December 26, 2023, with refrigerant charge sizes less than or equal to 500 g using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater;

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

Self-contained refrigerated food processing and dispensing products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Self-contained refrigerated food processing and dispensing products

**Restriction type:** manufacture/import

**Maximum GWP:** named list

**Effective date:** January 1, 2027

**Conditions:** with refrigerant charge sizes greater than 500 g

**CFR paragraph:** § 84.54(a)(9)(ii)

> ( 9 ) Self-contained refrigerated food processing and dispensing products as follows: ( i ) Effective January 1, 2027, products outside the scope of UL 621, “Ice Cream Makers,” Edition 7, dated May 07, 2010, with revisions through September 16, 2020, as of December 26, 2023, with refrigerant charge sizes less than or equal to 500 g using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 150 or greater; ( ii ) Effective January 1, 2027, products outside the scope of UL 621, “Ice Cream Makers,” Edition 7, dated May 7, 2010, with revisions through September 16, 2020, as of December 26, 2023, with refrigerant charge sizes greater than 500 g, using any of the following: R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-407H, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-427A, R-428A, R-434A, R-437A, R-438A, R-507A, HFC-134a, HFC-227ea, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, or Freeze 12; and

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


**Sector/subsector:** refrigerated food processing and dispensing products

**Restriction type:** manufacture/import

**Maximum GWP:** named list

**Effective date:** January 1, 2028

**Conditions:** within the scope of UL 621

**CFR paragraph:** § 84.54(a)(9)(iii)

> ( iii ) Effective January 1, 2028, for refrigerated food processing and dispensing products within the scope of UL 621, “Ice Cream Makers,” Edition 7, dated May 7, 2010, with revisions through September 16, 2020, as of December 26, 2023, using any of the following: R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-407H, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-427A, R-428A, R-434A, R-437A, R-438A, R-507A, HFC-134a, HFC-227ea, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, or Freeze 12.

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

refrigerated food processing and dispensing products — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** any product that uses a regulated substance as listed in paragraph (a)

**Restriction type:** sale/distribution

**Effective date:** three years after the dates listed for each subsector

**CFR paragraph:** § 84.54(b)

> ( b ) Effective three years after the dates listed for each subsector in <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(a)> paragraph (a) of this section, no person may sell, distribute, offer for sale or distribution, make available for sale or distribution, purchase or receive for sale or distribution, or attempt to purchase or receive for sale or distribution, or export any product that uses a regulated substance as listed in paragraph (a).

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

any product that uses a regulated substance as listed in paragraph (a) — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** residential or light commercial air-conditioning or heat pump systems

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**Conditions:** may continue to be installed where all specified components of that system are manufactured or imported prior to January 1, 2025

**Exemptions:** except for variable refrigerant flow air-conditioning and heat pump systems

**CFR paragraph:** § 84.54(c)(1)

> ( 1 ) Effective January 1, 2025, residential or light commercial air-conditioning or heat pump systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater, except for variable refrigerant flow air-conditioning and heat pump systems. New residential and light commercial air-conditioning and heat pump systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater may continue to be installed where all specified components of that system are manufactured or imported prior to January 1, 2025.

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

residential or light commercial air-conditioning or heat pump systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Industrial process refrigeration systems, other than chiller systems

**Restriction type:** installation

**Maximum GWP:** 150

**Effective date:** January 1, 2026

**Conditions:** 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

**CFR paragraph:** § 84.54(c)(10)(i)

> ( 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;

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

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


**Sector/subsector:** Industrial process refrigeration systems, other than chiller systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2026

**Conditions:** systems with a refrigerant charge capacity less than 200 pounds and with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F)

**CFR paragraph:** § 84.54(c)(10)(ii)

> ( 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;

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


**Sector/subsector:** Industrial process refrigeration systems, other than chiller systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2026

**Conditions:** the high temperature side of cascade systems with the refrigerant temperature entering the evaporator higher than −30 °C (−22 °F)

**CFR paragraph:** § 84.54(c)(10)(iii)

> ( 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;

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


**Sector/subsector:** Industrial process refrigeration systems, other than chiller systems

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2028

**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)

**CFR paragraph:** § 84.54(c)(10)(iv)

> ( 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>


**Sector/subsector:** Systems used in the manufacture of semiconductors

**Restriction type:** installation

**Effective date:** January 1, 2030

**Conditions:** with a charge size of 100 pounds or less

**CFR paragraph:** § 84.54(c)(10)(v)

> ( v ) Systems used in the manufacture of semiconductors with a charge size of 100 pounds or less must comply with the restrictions of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(10)(ii)> paragraphs (c)(10)(ii) through <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(10)(iv)> (iv) of this section, as applicable, by January 1, 2030.

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

Systems used in the manufacture of semiconductors — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** remote condensing units in retail food refrigeration systems

**Restriction type:** installation

**Maximum GWP:** 1,400

**Effective date:** July 27, 2026

**CFR paragraph:** § 84.54(c)(11)(i)

> ( i ) Effective July 27, 2026, remote condensing units in retail food refrigeration systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 1,400 or greater; and

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

remote condensing units in retail food refrigeration systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** remote condensing units in retail food refrigeration systems

**Restriction type:** installation

**Maximum GWP:** 150

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity of 200 pounds or greater, that are not the high temperature side of a cascade system

**CFR paragraph:** § 84.54(c)(11)(ii)(A)

> ( ii ) Effective January 1, 2032, remote condensing units in retail food refrigeration systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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;

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


**Sector/subsector:** remote condensing units in retail food refrigeration systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity less than 200 pounds

**CFR paragraph:** § 84.54(c)(11)(ii)(B)

> ( ii ) Effective January 1, 2032, remote condensing units in retail food refrigeration systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and

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


**Sector/subsector:** remote condensing units in retail food refrigeration systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system

**CFR paragraph:** § 84.54(c)(11)(ii)(C)

> ( ii ) Effective January 1, 2032, remote condensing units in retail food refrigeration systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and ( C ) Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system with a global warming potential of 300 or greater.

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


**Sector/subsector:** supermarket systems

**Restriction type:** installation

**Maximum GWP:** 1,400

**Effective date:** January 1, 2027

**CFR paragraph:** § 84.54(c)(12)(i)

> ( i ) Effective January 1, 2027, supermarket systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 1,400 or greater; and

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

supermarket systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** supermarket systems

**Restriction type:** installation

**Maximum GWP:** 150

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity of 200 pounds or greater, that are not the high temperature side of a cascade system

**CFR paragraph:** § 84.54(c)(12)(ii)(A)

> ( ii ) Effective January 1, 2032, supermarket systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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;

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


**Sector/subsector:** supermarket systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity less than 200 pounds

**CFR paragraph:** § 84.54(c)(12)(ii)(B)

> ( ii ) Effective January 1, 2032, supermarket systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and

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


**Sector/subsector:** supermarket systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system

**CFR paragraph:** § 84.54(c)(12)(ii)(C)

> ( ii ) Effective January 1, 2032, supermarket systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and ( C ) Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system with a global warming potential of 300 or greater.

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


**Sector/subsector:** data center, information technology equipment facility, and computer room cooling systems

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2027

**CFR paragraph:** § 84.54(c)(13)

> ( 13 ) Effective January 1, 2027, data center, information technology equipment facility, and computer room cooling systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

data center, information technology equipment facility, and computer room cooling systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** automatic commercial ice machines with a remote condenser

**Restriction type:** installation

**Maximum GWP:** named list

**Effective date:** January 1, 2027

**Conditions:** R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation), or GHG-X5

**CFR paragraph:** § 84.54(c)(14)

> ( 14 ) Effective January 1, 2027, automatic commercial ice machines with a remote condenser using any of the following: R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation), or GHG-X5.

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

automatic commercial ice machines with a remote condenser — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** refrigerated food processing and dispensing equipment with a remote condenser

**Restriction type:** installation

**Maximum GWP:** named list

**Effective date:** January 1, 2027

**Conditions:** R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-407H, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-427A, R-428A, R-434A, R-437A, R-438A, R-507A, HFC-134a, HFC-227ea, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, or Freeze 12

**CFR paragraph:** § 84.54(c)(15)

> ( 15 ) Effective January 1, 2027, refrigerated food processing and dispensing equipment with a remote condenser using any of the following: R-402A, R-402B, R-404A, R-407A, R-407B, R-407C, R-407F, R-407H, R-408A, R-410A, R-410B, R-411A, R-411B, R-417A, R-417C, R-420A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-426A, R-427A, R-428A, R-434A, R-437A, R-438A, R-507A, HFC-134a, HFC-227ea, R-125/290/134a/600a (55/1/42.5/1.5), RB-276, RS-24 (2002 formulation), RS-44 (2003 formulation), GHG-X5, or Freeze 12.

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

refrigerated food processing and dispensing equipment with a remote condenser — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2026

**Conditions:** may be installed prior to January 1, 2027, where all specified components of that system are manufactured or imported prior to January 1, 2026

**Exemptions:** may be installed prior to January 1, 2028, when an approved building permit issued prior to October 5, 2023, specifies the use of a restricted regulated substance

**CFR paragraph:** § 84.54(c)(2)

> ( 2 ) Effective January 1, 2026, variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps, using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater. Such new variable refrigerant flow systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater may be installed prior to January 1, 2027, where all specified components of that system are manufactured or imported prior to January 1, 2026. Such new variable refrigerant flow systems using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater may be installed prior to January 1, 2028, when an approved building permit issued prior to October 5, 2023, specifies the use of a restricted regulated substance, or blend containing a restricted regulated substance, in such system detailed in that building permit, and where all specified components of that system are manufactured or imported prior to January 1, 2026.

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

variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for comfort cooling

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(c)(3)

> ( 3 ) Effective January 1, 2025, chillers for comfort cooling using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

chillers for comfort cooling — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** ice rinks

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2025

**CFR paragraph:** § 84.54(c)(4)

> ( 4 ) Effective January 1, 2025, ice rinks using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater;

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

ice rinks — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for industrial process refrigeration

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2026

**Conditions:** where the temperature of the fluid exiting the chiller is greater than -30 °C (−22 °F)

**CFR paragraph:** § 84.54(c)(5)(i)

> ( i ) Effective January 1, 2026, chillers for industrial process refrigeration where the temperature of the fluid exiting the chiller is greater than -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>

chillers for industrial process refrigeration — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** Chillers

**Restriction type:** installation

**Effective date:** January 1, 2030

**Conditions:** with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors

**CFR paragraph:** § 84.54(c)(5)(ii)

> ( ii ) Chillers subject to <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(5)(i)> paragraph (c)(5)(i) of this section with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors must comply with the restriction of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(5)(i)> paragraph (c)(5)(i) of this section by January 1, 2030.

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

Chillers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** chillers for industrial process refrigeration

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** January 1, 2028

**Conditions:** where the temperature of the fluid exiting the chiller is greater than or equal to −50 °C (−58 °F) and less than or equal to −30 °C (−22 °F)

**CFR paragraph:** § 84.54(c)(6)(i)

> ( i ) Effective January 1, 2028, chillers for industrial process refrigeration where the temperature of the fluid exiting the chiller is greater than or equal to −50 °C (−58 °F) and 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>


**Sector/subsector:** Chillers

**Restriction type:** installation

**Effective date:** January 1, 2030

**Conditions:** with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors

**CFR paragraph:** § 84.54(c)(6)(ii)

> ( ii ) Chillers subject to <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(6)(i)> paragraph (c)(6)(i) of this section with a refrigerant charge capacity of 100 pounds or less that are used in the manufacture of semiconductors must comply with the restriction of <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)(6)(i)> paragraph (c)(6)(i) of this section by January 1, 2030.

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


**Sector/subsector:** refrigerated transport—intermodal containers

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** July 27, 2026

**Conditions:** with a box temperature of −35 °C (−31 °F) or higher

**CFR paragraph:** § 84.54(c)(7)

> ( 7 ) Effective July 27, 2026, refrigerated transport—intermodal containers with a box temperature of −35 °C (−31 °F) or higher using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 700 or greater.

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

refrigerated transport—intermodal containers — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** refrigerated transport—road or refrigerated transport—marine systems

**Restriction type:** installation

**Maximum GWP:** named list

**Effective date:** January 1, 2025

**Conditions:** R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5

**CFR paragraph:** § 84.54(c)(8)

> ( 8 ) Effective January 1, 2025, refrigerated transport—road or refrigerated transport—marine systems using any of the following: R-402A, R-402B, R-404A, R-407B, R-408A, R-410B, R-417A, R-421A, R-421B, R-422A, R-422B, R-422C, R-422D, R-424A, R-428A, R-434A, R-438A, R-507A, R-125/290/134a/600a (55/1/42.5/1.5), RS-44 (2003 formulation) or GHG-X5;

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

refrigerated transport—road or refrigerated transport—marine systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** cold storage warehouse systems

**Restriction type:** installation

**Maximum GWP:** 700

**Effective date:** July 27, 2026

**CFR paragraph:** § 84.54(c)(9)(i)

> ( i ) Effective July 27, 2026, cold storage warehouse systems 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>

cold storage warehouse systems — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)


**Sector/subsector:** cold storage warehouse systems

**Restriction type:** installation

**Maximum GWP:** 150

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity of 200 pounds or greater, that are not the high temperature side of a cascade system

**CFR paragraph:** § 84.54(c)(9)(ii)(A)

> ( ii ) Effective January 1, 2032, cold storage warehouse systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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;

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


**Sector/subsector:** cold storage warehouse systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Systems with a refrigerant charge capacity less than 200 pounds

**CFR paragraph:** § 84.54(c)(9)(ii)(B)

> ( ii ) Effective January 1, 2032, cold storage warehouse systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and

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


**Sector/subsector:** cold storage warehouse systems

**Restriction type:** installation

**Maximum GWP:** 300

**Effective date:** January 1, 2032

**Conditions:** Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system

**CFR paragraph:** § 84.54(c)(9)(ii)(C)

> ( ii ) Effective January 1, 2032, cold storage warehouse systems using a regulated substance, or a blend containing a regulated substance, as follows: ( A ) Systems with a refrigerant charge capacity of 200 pounds or greater, 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; ( B ) Systems with a refrigerant charge capacity less than 200 pounds using a regulated substance, or a blend containing a regulated substance, with a global warming potential of 300 or greater; and ( C ) Cascade refrigerant systems using a regulated substance, or a blend containing a regulated substance, on the high temperature side of the system with a global warming potential of 300 or greater.

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


**Sector/subsector:** industrial process refrigeration systems with a January 1, 2026, compliance date, retail food—supermarket, cold storage warehouse, and ice rink subsectors

**Restriction type:** installation

**Effective date:** extended one year beyond the specified compliance date

**Conditions:** when an approved building permit issued prior to October 5, 2023, specifies the use of a restricted regulated substance

**CFR paragraph:** § 84.54(d)

> ( d ) The compliance date for the installation of a system in <https://www.ecfr.gov/current/title-40/section-84.54#p-84.54(c)> paragraph (c) of this section for the industrial process refrigeration systems with a January 1, 2026, compliance date, retail food—supermarket, cold storage warehouse, and ice rink subsectors is extended one year beyond the specified compliance date when an approved building permit issued prior to October 5, 2023, specifies the use of a restricted regulated substance, or blend containing a regulated substance, in a system detailed in that permit.

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

industrial process refrigeration systems with a January 1, 2026, compliance date, retail food—supermarket, cold storage warehouse, and ice rink subsectors — US AIM Act sector-specific refrigerant GWP limits and compliance dates (40 CFR 84.54)