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It explains upcoming changes driven by EPA restrictions on HFC production and use, clarifies how these rules interact with the 2018 and 2024 NC Mechanical Code/Building Codes, and addresses common questions about code selection, installation requirements, existing appliance use, effective dates, and safety considerations, with references for further information.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/engineering-newsletter-june-2024-a2l-edition/295960/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/engineering-newsletter-june-2024-a2l-edition/295960.png","ImageObject",300,407,{"name":92,"@type":93},"Jiven","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-17","2026-09-18",true,{"@type":102,"interactionType":103,"userInteractionCount":44},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What regulatory changes are driving the transition to A2L refrigerants?","Question",{"text":112,"@type":113},"The newsletter explains that EPA regulations restrict production and use of HFCs, including common refrigerants like R-410A. As those refrigerants are phased down, the industry shifts to next-generation refrigerants, many of which are classified as A2L with higher flammability than current A1 refrigerants.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How do these changes affect existing HVACR appliances and whether they can be used or repaired?",{"text":117,"@type":113},"The document includes guidance for evaluating which code path to use and asks how the regulations affect existing appliances, including whether they can still be used and repaired. It also addresses plans that must pivot when projects previously targeted A1 appliances but face appliance availability constraints.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the key installation/code considerations when 2018 and 2024 NC codes are both relevant?",{"text":121,"@type":113},"The newsletter covers how the 2024 NC Mechanical Code addresses A2L refrigerants and what installation requirements apply while the 2018 NCMC is still in effect. It also discusses where to find relevant standards (including ASHRAE 15-2022) and explains why ASHRAE 15-2022 can be used as an alternative method under 2018 NCMC but not under 2024 NCMC.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},295960,1789726307,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":44,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":144},1099513958607,"https://ap-avatar.wpscdn.com/avatar/100002390cf8733938c?x-image-process=image/resize,m_fixed,w_180,h_180&k=1778829742770036399","MIKE CAUSEY-Insurance Commissioner, Brian Taylor-State Fire Marshal  \n1429 Rock Quarry Rd, Raleigh, NC 27610 (Street Address)  \n1202 Mail Service Center, Raleigh, NC 27699-1202 (Mailing Address)  \n(919) 647-0000  \n[https://www.ncosfm.gov/](https://www.ncosfm.gov/)  \nSUBSCRIBE  \nJune 2024 – A2L Edition  \nTable of Contents  \nIntroduction ............................................................................................................................. 2  \nCurrent Topics .......................................................................................................................... 2  \nA2L Refrigerants-Overview....................................................................................................................... 2  \nOverview of Upcoming Refrigerant Changes ....................................................................................... 2  \nBrief Overview of Refrigerant Classifications and Flammability Properties: .................................... 2  \nWhat are the EPA regulations driving this refrigerant transition and where can I find more information about them? ................................................................................................................. 3  \nWhat are NC CEO responsibilities with regards to these federal regulations? ................................ 4  \nWhat are the manufacturing and installation effective dates for affected HVACR appliances and equipment? ...................................................................................................................................... 5  \nHow do these regulations affect existing appliances? Can they still be used and repaired? .......... 6  \nCan A2L refrigerant be utilized in existing A1 refrigeration systems? ............................................. 6  \nHow does the 2024 NC Mechanical Code address A2L refrigerants? .............................................. 6  \nWhere can I find the 2024 NCMC? ................................................................................................... 9  \nWhat are the installation requirements for HVACR appliances utilizing A2L refrigerants while the 2018 NCMC is still in effect? ............................................................................................................. 9  \nWhere can I find ASHRAE 15-2022, the 2024 IMC and the 2024 NCMC? ...................................... 10  \nWhy can ASHRAE 15-2022 be utilized as an alternative method under the 2018 NCMC but not the 2024 NCMC? ................................................................................................................................... 10  \nEng ineer ing Newsletter  \nWhat are the installation requirements for HVACR appliances utilizing A2L refrigerants under the 2018 and 2024 NCRC? .................................................................................................................... 10  \nAre A2L refrigerants safe? .............................................................................................................. 11  \nAdditional information: .................................................................................................................. 12  \nLinks for further information: ......................................................................................................... 12  \nIntroduction  \nWelcome to the June 2024 A2L Edition of the OSFM Engineering Newsletter. Due to the length of the topic, this article is published as its own newsletter, which will enable readers to search and find it easier, and also allow the Engineering Department to update it as conditions warrant.  \nPlease note the information in this newsletter is not code language, or formal interpretations of code language, but a summary of the various federal regulations affecting the refrigerants, a summary of common questions received on this topic, and suggested guidelines for evaluating which code path to take to accommodate the newer refr","cbCailcW8s26LFhG","https://ap.wps.com/l/cbCailcW8s26LFhG","pdf",644230,13,"English","# Introduction\n# Current Topics\n## A2L Refrigerants-Overview\n## Overview of Upcoming Refrigerant Changes\n## Brief Overview of Refrigerant Classifications and Flammability Properties\n## EPA regulations driving the refrigerant transition\n## NC CEO responsibilities\n## Manufacturing and installation effective dates\n## Effects on existing appliances and repairability\n## Using A2L refrigerant in existing A1 refrigeration systems\n## NC Mechanical Code treatment of A2L refrigerants (2024)\n## Where to find the 2024 NCMC\n## Installation requirements when 2018 NCMC is still in effect\n## Where to find ASHRAE 15-2022, 2024 IMC and 2024 NCMC\n## Why ASHRAE 15-2022 is an alternative method under 2018 NCMC but not 2024 NCMC\n## Installation requirements under 2018 and 2024 NCRC\n## Are A2L refrigerants safe?\n## Additional information\n## Links for further information","[{\"question\":\"What regulatory changes are driving the transition to A2L refrigerants?\",\"answer\":\"The newsletter explains that EPA regulations restrict production and use of HFCs, including common refrigerants like R-410A. As those refrigerants are phased down, the industry shifts to next-generation refrigerants, many of which are classified as A2L with higher flammability than current A1 refrigerants.\"},{\"question\":\"How do these changes affect existing HVACR appliances and whether they can be used or repaired?\",\"answer\":\"The document includes guidance for evaluating which code path to use and asks how the regulations affect existing appliances, including whether they can still be used and repaired. It also addresses plans that must pivot when projects previously targeted A1 appliances but face appliance availability constraints.\"},{\"question\":\"What are the key installation/code considerations when 2018 and 2024 NC codes are both relevant?\",\"answer\":\"The newsletter covers how the 2024 NC Mechanical Code addresses A2L refrigerants and what installation requirements apply while the 2018 NCMC is still in effect. It also discusses where to find relevant standards (including ASHRAE 15-2022) and explains why ASHRAE 15-2022 can be used as an alternative method under 2018 NCMC but not under 2024 NCMC.\"}]","Engineering Newsletter - June 2024 - A2L Edition | PDF",33]