variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps
For variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps, restriction type is installation; maximum gwp is 700; effective date is January 1, 2026; conditions is 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 is 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, recorded from its source on 2026-08-06.
- Sector/subsector
- variable refrigerant flow systems for use as residential or light commercial air-conditioning or heat pumps verified
- Restriction type
- installation our reading
- Maximum GWP
- 700 verified
- Effective date
- January 1, 2026 verified
- 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 verified
- 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 verified
- CFR paragraph
- § 84.54(c)(2) our reading
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
( 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.
— ecfr.gov, retrieved 2026-08-06
Source
- ecfr.govhttps://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84