{"id":35838,"date":"2026-10-24T10:02:00","date_gmt":"2026-10-24T14:02:00","guid":{"rendered":"https:\/\/learningtcf.com\/a2l-refrigerants\/"},"modified":"2026-10-24T18:30:24","modified_gmt":"2026-10-24T22:30:24","slug":"a2l-refrigerants","status":"publish","type":"post","link":"https:\/\/learningtcf.com\/en\/a2l-refrigerants\/","title":{"rendered":"A2L refrigerants: what they are and why air conditioners are changing"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">If you have seen new air conditioners in 2025 or 2026, they probably already use a different refrigerant. Here is why.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why are refrigerants changing?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The AIM Act of 2020 gave the EPA the task of reducing HFC refrigerants with a high global warming potential. Under the EPA Technology Transitions rule, new residential air conditioning systems must use lower-impact refrigerants. That is why R-410A, which was used for years, is being replaced in new equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most common replacements are <strong>R-454B<\/strong> and <strong>R-32<\/strong>, which have a much lower global warming potential than R-410A.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What does A2L mean?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It is a safety classification from the ASHRAE 34 standard:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>\u201cA\u201d<\/strong> means low toxicity.<\/li>\n\n<li>The <strong>\u201c2L\u201d<\/strong> means they are mildly flammable: they can ignite under specific conditions, although less easily than other flammable gases.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What changes when handling them?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Because they are mildly flammable, A2L refrigerants call for different precautions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tools and recovery equipment approved for A2L.<\/li>\n\n<li>Good ventilation and control of ignition sources in the area.<\/li>\n\n<li>Specific charging, recovery and evacuation procedures.<\/li>\n\n<li>Proper leak detection.<\/li>\n<\/ul>\n\n\n\n<div class=\"ltcf-guia-cta\"><p class=\"ltcf-guia-cta__t\">In the Safe Handling of A2L Flammable Refrigerants course you learn the classification, the precautions and the procedures step by step.<\/p><div class=\"ltcf-guia-cta__b\"><a class=\"ltcf-guia-cta__p\" href=\"https:\/\/learningtcf.com\/product\/safe-handling-of-a2l-flammable-refrigerants\/\">See the A2L course<\/a><a class=\"ltcf-guia-cta__s\" href=\"https:\/\/learningtcf.com\/en\/combo-curso-hvac\/\">See the HVAC Technician Combo<\/a><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Educational content from Learning Trade Center of Florida.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What A2L means, why new air conditioners use R-454B and R-32, and what precautions these refrigerants call for.<\/p>\n","protected":false},"author":5,"featured_media":35830,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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