{"abstract":"The U.S. Environmental Protection Agency is amending a provision of the 2023 Technology Transitions regulations promulgated under the American Innovation and Manufacturing Act of 2020. This action provides until January 1, 2027, for the installation of certain new variable refrigerant flow air conditioning and heat pump systems which use components manufactured in the United States or imported into the United States prior to January 1, 2026. This action also provides until January 1, 2028, for the installation of certain new variable refrigerant flow air conditioning and heat pump systems if a building permit that approves the use of a hydrofluorocarbon or blend containing a hydrofluorocarbon in such a system was issued prior to October 5, 2023, provided that the system uses components manufactured in the United States or imported into the United States prior to January 1, 2026. This action will mitigate the potential for stranded inventory of variable refrigerant flow systems.","action":"Final rule.","agencies":[{"raw_name":"ENVIRONMENTAL PROTECTION AGENCY","name":"Environmental Protection Agency","id":145,"url":"https://www.federalregister.gov/agencies/environmental-protection-agency","json_url":"https://www.federalregister.gov/api/v1/agencies/145","parent_id":null,"slug":"environmental-protection-agency"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2024/12/12/2024-29243.html","cfr_references":[{"chapter":null,"citation_url":null,"part":84,"title":40}],"citation":"89 FR 100381","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This final rule is effective on January 13, 2025.","disposition_notes":null,"docket_ids":["EPA-HQ-OAR-2021-0643","FRL-11739-02-OAR"],"dockets":[{"supporting_documents":[{"title":"Frequent Questions on the Phasedown of Hydrofluorocarbons","document_id":"EPA-HQ-OAR-2021-0643-0277"},{"title":"Residential Central AC and HP AHRI Shipments 20231121","document_id":"EPA-HQ-OAR-2021-0643-0245"},{"title":"AHRI Alliance HARDI Letter to Cindy Newberg 11 Dec 23","document_id":"EPA-HQ-OAR-2021-0643-0243"},{"title":"2024-03-05 Extell Letter to EPA","document_id":"EPA-HQ-OAR-2021-0643-0242"},{"title":"Interim Final Rule - Additional Materials","document_id":"EPA-HQ-OAR-2021-0643-0235"},{"title":"FRM – Additional Supporting Material","document_id":"EPA-HQ-OAR-2021-0643-0232"},{"title":"FRM – New Materials and Documents Referenced in the Technical Support Documents","document_id":"EPA-HQ-OAR-2021-0643-0229"},{"title":"FRM – New Materials and Documents Referenced in the Final Rule","document_id":"EPA-HQ-OAR-2021-0643-0228"},{"title":"NPRM -  Materials and Documents Referenced in the Technical Support Documents","document_id":"EPA-HQ-OAR-2021-0643-0069"},{"title":"NPRM - OMB E.O. 12866 Review","document_id":"EPA-HQ-OAR-2021-0643-0067"}],"agency_name":"EPA","documents":[{"comment_count":null,"comment_start_date":null,"updated_at":"2024-12-12T08:59:49.828-05:00","comment_url":"https://www.regulations.gov/commenton/EPA-HQ-OAR-2021-0643-0278","allow_late_comments":false,"id":"EPA-HQ-OAR-2021-0643-0278","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":85,"id":"EPA-HQ-OAR-2021-0643","title":"Restrictions on Certain Uses of Hydrofluorocarbons under Subsection (i) of the American Innovation and  Manufacturing Act"}],"document_number":"2024-29243","effective_on":"2025-01-13","end_page":100392,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2024/12/12/2024-29243.xml","html_url":"https://www.federalregister.gov/documents/2024/12/12/2024-29243/phasedown-of-hydrofluorocarbons-restrictions-on-the-use-of-hfcs-under-the-aim-act-in-variable","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2024-29243?publication_date=2024-12-12","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2024-12-12/2024-29243/mods.xml","not_received_for_publication":null,"page_length":12,"page_views":{"count":7143,"last_updated":"2026-04-04 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2024-12-12/pdf/2024-29243.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2024-29243.pdf?1733924743","publication_date":"2024-12-12","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2024/12/12/2024-29243.txt","regulation_id_number_info":{"2060-AW20":{"issue":"202410","html_url":"https://www.federalregister.gov/regulations/2060-AW20/phasedown-of-hydrofluorocarbons-restrictions-on-the-use-of-hfcs-under-the-aim-act-in-variable-refrig","title":"Phasedown of Hydrofluorocarbons: Restrictions on the Use of HFCs Under the AIM Act in Variable Refrigerant Flow Air Conditioning Systems","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202410&RIN=2060-AW20&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["2060-AW20"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Frequent Questions on the Phasedown of Hydrofluorocarbons","document_id":"EPA-HQ-OAR-2021-0643-0277"},{"title":"Residential Central AC and HP AHRI Shipments 20231121","document_id":"EPA-HQ-OAR-2021-0643-0245"},{"title":"AHRI Alliance HARDI Letter to Cindy Newberg 11 Dec 23","document_id":"EPA-HQ-OAR-2021-0643-0243"},{"title":"2024-03-05 Extell Letter to EPA","document_id":"EPA-HQ-OAR-2021-0643-0242"},{"title":"Interim Final Rule - Additional Materials","document_id":"EPA-HQ-OAR-2021-0643-0235"},{"title":"FRM – Additional Supporting Material","document_id":"EPA-HQ-OAR-2021-0643-0232"},{"title":"FRM – New Materials and Documents Referenced in the Technical Support Documents","document_id":"EPA-HQ-OAR-2021-0643-0229"},{"title":"FRM – New Materials and Documents Referenced in the Final Rule","document_id":"EPA-HQ-OAR-2021-0643-0228"},{"title":"NPRM -  Materials and Documents Referenced in the Technical Support Documents","document_id":"EPA-HQ-OAR-2021-0643-0069"},{"title":"NPRM - OMB E.O. 12866 Review","document_id":"EPA-HQ-OAR-2021-0643-0067"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2060-AV46/restrictions-on-certain-uses-of-hydrofluorocarbons-under-subsection-i-of-the-american-innovation-and","title":"Restrictions on Certain Uses of Hydrofluorocarbons Under Subsection (i) of the American Innovation and Manufacturing Act"},"comments_count":0,"agency_id":"EPA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=EPA-HQ-OAR-2021-0643","supporting_documents_count":85,"docket_id":"EPA-HQ-OAR-2021-0643","document_id":"EPA-HQ-OAR-2021-0643-0278","regulation_id_number":"2060-AV46","title":"Restrictions on Certain Uses of Hydrofluorocarbons under Subsection (i) of the American Innovation and  Manufacturing Act","checked_regulationsdotgov_at":"2024-12-13T13:00:09Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":100381,"subtype":null,"title":"Phasedown of Hydrofluorocarbons: Restrictions on the Use of HFCs Under the AIM Act in Variable Refrigerant Flow Air Conditioning Subsector","toc_doc":"Restrictions on the Use of Hydrofluorocarbons under the American Innovation and Manufacturing Act in Variable Refrigerant Flow Air Conditioning Subsector","toc_subject":"Phasedown of Hydrofluorocarbons","topics":["Administrative practice and procedure","Air pollution control","Chemicals","Environmental protection","Imports","Reporting and recordkeeping requirements"],"type":"Rule","volume":89}