[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-505231-105":59,"doc-detail-505231-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","reference-sheet-a2l-safety-group-why-a2ls","Reference Sheet - A2L Safety Group - Why A2Ls","","Reference sheet outlining A2L refrigerant safety and transition guidance for HVACR professionals. It explains the safety group flammability/toxicity mapping, why A2L options such as R-454B are favored for lower GWP and faster atmospheric life, and highlights key servicing tools and operating precautions. It debunks common myths about ignition risk, leak response, certification, and tooling changes, then lists compliance deadlines and installation/service procedures for phasedown and equipment labeling.",{"@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/reference-sheet-a2l-safety-group-why-a2ls/505231/",{"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/reference-sheet-a2l-safety-group-why-a2ls/505231.png","ImageObject",300,407,{"name":92,"@type":93},"noah","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-04",true,{"@type":102,"interactionType":103,"userInteractionCount":39},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How do safety groups relate flammability and toxicity for refrigerants?","Question",{"text":112,"@type":113},"The sheet presents a matrix matching higher/lower flammability (including A2L) with lower/higher toxicity levels to define safety groups.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why does the sheet recommend A2L refrigerants such as R-454B?",{"text":117,"@type":113},"It lists lower GWP, short atmospheric lifespan, similar or improved performance versus R-410A, compatibility with POE oils, lighter equipment, and use of A2L refrigerants globally.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the key tool and servicing considerations when working on A2L systems?",{"text":121,"@type":113},"It emphasizes using tools that can work for A1/A2L when they don’t touch the refrigerant circuit, selecting proper manifolds, ensuring A2L certifications for leak detectors/recovery equipment, and using non-sparking preferred hand tools.","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},505231,1791504894,{"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":39,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24},1099529839121,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Reference Sheet  \nDe ningA2L  \nThe HVACR industry is making the transition to more environmentally friendly (lower GWP) refrigerants. With this transition, HFCs are being phased down and there has been a growing acceptance of the use of A2L refrigerants due to their lower ammability and toxicity.  \nI  \nN  \nC  \nR  \nE  \nA  \nS I  \nN  \nG  \nF  \nL  \nA  \nM  \nM  \nA  \nB  \nI L  \nI  \nT  \nY  \nSafety Group  \n\n| Higher Flammability | A3 | B3 |\n| --- | --- | --- |\n| Flammable | A2 | B2 |\n| Lower Flammability | \u003Cbr>A2L | B2L |\n| No Flame Propagation | A 1 | B 1 |\n|  | Lower Toxicity | Higher Toxicity |\n\nWhy A2Ls  \n• R-454B is an environmentally friendly refrigerant with a low GWP of 466, which is 78% lower than the GWP of R-410A  \n• R-454B has an atmospheric life span of only 11 days  \n• R-454B o ers similar performance to R-410A  \n• R-454B o ers slightly lower operating pressures than R-410A  \n• R-454B systems use less charge than R-410A systems  \n• R-454B equipment will be lighter than R-410A systems  \n• R-454B is compatible with POE oils  \n• A2L refrigerants are used globally in HVACR equipment  \nServicing A2L Systems: The Four Main Tools Technicians will need  \nWhile service technicians may believe they will need to purchase all new tools to work with A2L refrigerants, many of the tools they use each day will remain the same.  \nIn general, tools that don’t touch the refrigerant circuit—such as non-electric hand tools, access valves and valve core removal tools—can usually be used for both A1 andA2L systems.  \n M&ANGAIFUOGLDESS 2 VACUUPUMPSM 3 RECOVMACHIENREYS 4 LDEEAKTECTORS   \n1  \nTool Review  \n\n| Analog gauge manifold | Will need to re􀀝ect A2L saturation temperatures |\n| --- | --- |\n| Digital gauge manifold | Set to proper refrigerant |\n| Vacuum pump | Switch located away from the work zone |\n| Dry powder /\u003Cbr>CO 2 re extinguisher | Chemical compatible |\n| Electronic leak detector | A2L certi􀀞ed |\n| Refrigerant\u003Cbr>recovery cylinder | Flammable (GHS label, left-hand thread) |\n| Recovery machines | A2L certi􀀞ed |\n| Electric hand tools | Non-sparking preferred (AHRI-8017) |\n\nMyth & Facts  \nMYTH: A2L refrigerants are likely to cause a 􀀞re  \nFACT: It takes a tremendous amount of energy to ignite an A2L refrigerant compared to an A3 refrigerant  \nFACT: While A2L refrigerants are “mildly 􀀝ammable”, they are hard to ignite in normal daily situations  \nMYTH: If a leak occurs, the entire charge must be removed  \nFACT: R-454B glide is so low that system can be topped o (approximately 1.6 F)  \nMYTH: Additional EPA certi􀀞cation is required  \nFACT: EPA Section 608-certi􀀞ed technicians will be grandfathered in with no additional exam  \nMYTH: I will need to buy all new tools  \nFACT: Many tools used today will not change as some current tools are already A2L-approved  \nCompliance Deadlinesand Phasedown Schedules  \nThe phasedown schedule for HFC refrigerants and the introduction of A2L refrigerants come with speci c compliance deadlines. By January 2025, new residential and light commercial air conditioning units must exclusively use A2L refrigerants.  \nBy January 1, 2026, Variable Refrigerant Flow (VRF) systems must shift to low GWP refrigerants. Compliance with new regulations necessitates this change.  \n\n| INSTALLATION COMPLIANCE DATES |  |  |  |\n| --- | --- | --- | --- |\n| Applies to the installation ofNEW eld assembled systems. |  |  |  |\n| Refrigeration, Air Conditioning, and Heat Pump Systems |  |  |  |\n| Sector | Systems | Global Warming Potential Limit or Prohibited Substances | Installation Compliance Date |\n| Stationary air conditioning and heat pumps | Residential and light commercial air conditioning and heat pump system (e.g., mini-split, unitary systems) | 700 | January 1, 2025 (One amendment has already been made for “Stationary air conditioning and heat pumps”\u003Cbr>–The installation compliance date has been moved to 1/1/26, but equipment must be manufactured prior to 1/1/25) |\n|  | Variable refrigerant 􀀝 ow\u003Cbr>systems | 700 | January 1, 20","cbCair2aX7nSoi3X","https://ap.wps.com/l/cbCair2aX7nSoi3X","pdf",707214,"English","# Safety Group\n## Why A2Ls\n## Servicing A2L Systems: The Four Main Tools Technicians Will Need\n## Myth & Facts\n## Compliance Deadlines and Phasedown Schedules\n## Installation & Service Procedures\n## Safety Measures","[{\"question\":\"How do safety groups relate flammability and toxicity for refrigerants?\",\"answer\":\"The sheet presents a matrix matching higher/lower flammability (including A2L) with lower/higher toxicity levels to define safety groups.\"},{\"question\":\"Why does the sheet recommend A2L refrigerants such as R-454B?\",\"answer\":\"It lists lower GWP, short atmospheric lifespan, similar or improved performance versus R-410A, compatibility with POE oils, lighter equipment, and use of A2L refrigerants globally.\"},{\"question\":\"What are the key tool and servicing considerations when working on A2L systems?\",\"answer\":\"It emphasizes using tools that can work for A1/A2L when they don’t touch the refrigerant circuit, selecting proper manifolds, ensuring A2L certifications for leak detectors/recovery equipment, and using non-sparking preferred hand tools.\"}]","Reference Sheet - A2L Safety Group - Why A2Ls | PDF",1791092966]