{"id":7273,"date":"2026-06-29T09:00:00","date_gmt":"2026-06-29T09:00:00","guid":{"rendered":"https:\/\/www.simplywise.com\/blog\/?p=7273"},"modified":"2026-10-27T16:17:19","modified_gmt":"2026-10-27T16:17:19","slug":"hvac-certification","status":"publish","type":"post","link":"https:\/\/www.simplywise.com\/blog\/hvac-certification\/","title":{"rendered":"HVAC Certification Guide: Which Ones You Need in 2026"},"content":{"rendered":"<div class=\"rv2\">\n<div class=\"rv-site-header\">\n<div class=\"rv-header-in\"><a class=\"rv-brand\" href=\"https:\/\/www.simplywise.com\/\" aria-label=\"SimplyWise home\"><span class=\"rv-bgi\" role=\"img\" aria-label=\"SimplyWise\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/brand\/wordmark-navy.svg');aspect-ratio:546\/87\"><\/span><\/a><\/p>\n<nav class=\"rv-top-nav\" aria-label=\"Apps\">\n<ul>\n<li><a class=\"rv-tn\" href=\"https:\/\/www.simplywise.com\/#ch-estimates\"><span class=\"rv-bgi rv-tn-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/cost-estimator.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-tn-name\">Estimates<\/span><\/a><\/li>\n<li><a class=\"rv-tn\" href=\"https:\/\/www.simplywise.com\/#ch-receipts\"><span class=\"rv-bgi rv-tn-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/receipt-scanner.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-tn-name\">Receipts<\/span><\/a><\/li>\n<li><a class=\"rv-tn\" href=\"https:\/\/www.simplywise.com\/#ch-mileage\"><span class=\"rv-bgi rv-tn-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/mileage-tracker.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-tn-name\">Mileage<\/span><\/a><\/li>\n<li><a class=\"rv-tn\" href=\"https:\/\/www.simplywise.com\/#ch-rooms\"><span class=\"rv-bgi rv-tn-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/room-scanner.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-tn-name\">Room scans<\/span><\/a><\/li>\n<li><a class=\"rv-tn\" href=\"https:\/\/www.simplywise.com\/#ch-visualizer\"><span class=\"rv-bgi rv-tn-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/visualizer.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-tn-name\">Visualizer<\/span><\/a><\/li>\n<\/ul>\n<\/nav>\n<p><a class=\"rv-login\" href=\"https:\/\/simplywise.com\/login\">Log in<\/a><\/div>\n<nav class=\"rv-appbar\" aria-label=\"Apps\">\n<ul>\n<li><a class=\"rv-ab\" href=\"https:\/\/www.simplywise.com\/#ch-estimates\"><span class=\"rv-bgi rv-ab-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/cost-estimator.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-ab-name\">Estimates<\/span><\/a><\/li>\n<li><a class=\"rv-ab\" href=\"https:\/\/www.simplywise.com\/#ch-receipts\"><span class=\"rv-bgi rv-ab-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/receipt-scanner.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-ab-name\">Receipts<\/span><\/a><\/li>\n<li><a class=\"rv-ab\" href=\"https:\/\/www.simplywise.com\/#ch-mileage\"><span class=\"rv-bgi rv-ab-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/mileage-tracker.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-ab-name\">Mileage<\/span><\/a><\/li>\n<li><a class=\"rv-ab\" href=\"https:\/\/www.simplywise.com\/#ch-rooms\"><span class=\"rv-bgi rv-ab-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/room-scanner.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-ab-name\">Room scans<\/span><\/a><\/li>\n<li><a class=\"rv-ab\" href=\"https:\/\/www.simplywise.com\/#ch-visualizer\"><span class=\"rv-bgi rv-ab-ic\" aria-hidden=\"true\" style=\"background-image:url('https:\/\/www.simplywise.com\/static-pages\/static\/main-landing-page\/assets\/icons\/visualizer.svg');aspect-ratio:64\/64\"><\/span><span class=\"rv-ab-name\">Visualizer<\/span><\/a><\/li>\n<\/ul>\n<\/nav>\n<\/div>\n<p><script>\ndocument.addEventListener('DOMContentLoaded', function() {\n  var sels = ['.entry-header','.page-header','article > h1:first-child','.entry-footer'];\n  sels.forEach(function(s){document.querySelectorAll(s).forEach(function(el){el.style.display='none';});});\n  var el = document.querySelector('.sw-a');\n  while (el && el !== document.body) {\n    el.style.maxWidth='100%'; 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.sw-a__hero-figure img{aspect-ratio:4\/3}.rv2 .sw-a .sw-a__tldr{padding:0 20px !important}.rv2 .sw-a .sw-a__tldr-box{padding:24px 22px}.rv2 .sw-a .sw-a__finalcta{padding:64px 20px}.rv2 .sw-a .sw-a__faq{padding:56px 20px}}body:has(.rv2) #masthead,body:has(.rv2) #colophon{display:none !important}.rv2 .pm__prefsrc{text-align:inherit}.rv2 .pm__prefsrc a{text-decoration:none !important;border-bottom:0 !important}.rv2 .pm__prefsrc a:focus-visible{outline:2px solid var(--rv-blue);outline-offset:3px}.rv2 .rv-legacy-foot{display:none !important}.rv2 .rv-site-header p:not([class]),.rv2 .rv-site-footer p:not([class]){display:contents !important}.rv2 .rv-bgi{display:block;background-position:center;background-size:contain;background-repeat:no-repeat}.rv2 .rv-brand .rv-bgi{width:124px}@media (min-width:768px){.rv2 .rv-brand .rv-bgi{width:136px}}@media (min-width:1024px){.rv2 .rv-brand .rv-bgi{width:142px}}.rv2 .sw-c div[style*=\"display:flex\"]>br,.rv2 .sw-t div[style*=\"display:flex\"]>br{display:none !important}.rv2 .sw-c h1,.rv2 .sw-t h1{font-size:clamp(34px,11.2vw,52px) !important;line-height:1.02 !important;letter-spacing:-.045em !important}@media (min-width:1024px){.rv2 .sw-c h1,.rv2 .sw-t h1{font-size:52px !important;letter-spacing:-.05em !important}}@media (max-width:767px){.rv2 .sw-c section:first-of-type a[style*=\"border-radius:999px\"]:not([href*=\"preferences\/source\"]),.rv2 .sw-t section:first-of-type a[style*=\"border-radius:999px\"]:not([href*=\"preferences\/source\"]){display:flex !important;width:100% !important;justify-content:center !important;box-sizing:border-box !important;min-height:52px}}<\/style>\n<article class=\"sw-a\">\n<section class=\"sw-a__hero\">\n<div class=\"sw-a__inner\">\n<div class=\"sw-a__breadcrumb\">Blog &nbsp;&rsaquo;&nbsp; Business &amp; Growth<\/div>\n<p>    <span class=\"sw-a__eyebrow\">HVAC &middot; Career Guide<\/span><\/p>\n<h1><span class=\"rv-h1-a\">HVAC Certification Guide:<\/span> <span class=\"rv-h1-b\">Which Ones You Need in 2026<\/span><\/h1>\n<p class=\"sw-a__subtitle\">Every certification and license an HVAC technician needs in 2026, in the order you earn them. Sourced from the EPA, OSHA, NATE, and the Bureau of Labor Statistics.<\/p>\n<div class=\"sw-a__hero-cta\"><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" target=\"_blank\" rel=\"noopener\">Try SimplyWise Cost Estimator free<\/a><span class=\"sw-a__hero-cta-note\">Free to try &middot; <b>4.8<\/b> on the App Store for SimplyWise Cost Estimator<\/span><\/div>\n<div class=\"sw-a__meta\">\n      <span>SimplyWise<\/span><br \/>\n      <span class=\"sw-a__dot\"><\/span><br \/>\n      <span>Updated July 8, 2026<\/span><br \/>\n      <span class=\"sw-a__dot\"><\/span><br \/>\n      <span>6 min read<\/span>\n    <\/div>\n<p class=\"pm__prefsrc\" style=\"margin:16px 0 0;\"><a href=\"https:\/\/www.google.com\/preferences\/source?q=simplywise.com\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-flex;align-items:center;gap:8px;min-height:36px;max-width:100%;box-sizing:border-box;padding:6px 14px;background:#fff;border:1px solid #dbe6ff;border-radius:999px;color:#2563eb;font:600 13.5px\/1.3 Inter,-apple-system,sans-serif;text-decoration:none;white-space:nowrap;\"><svg width=\"18\" height=\"18\" viewBox=\"0 0 48 48\" aria-hidden=\"true\" focusable=\"false\" style=\"flex:none\"><path fill=\"#EA4335\" d=\"M24 9.5c3.54 0 6.71 1.22 9.21 3.6l6.85-6.85C35.9 2.38 30.47 0 24 0 14.62 0 6.51 5.38 2.56 13.22l7.98 6.19C12.43 13.72 17.74 9.5 24 9.5z\"\/><path fill=\"#4285F4\" d=\"M46.98 24.55c0-1.57-.15-3.09-.38-4.55H24v9.02h12.94c-.58 2.96-2.26 5.48-4.78 7.18l7.73 6c4.51-4.18 7.09-10.36 7.09-17.65z\"\/><path fill=\"#FBBC05\" d=\"M10.53 28.59c-.48-1.45-.76-2.99-.76-4.59s.27-3.14.76-4.59l-7.98-6.19C.92 16.46 0 20.12 0 24c0 3.88.92 7.54 2.56 10.78l7.97-6.19z\"\/><path fill=\"#34A853\" d=\"M24 48c6.48 0 11.93-2.13 15.89-5.81l-7.73-6c-2.15 1.45-4.92 2.3-8.16 2.3-6.26 0-11.57-4.22-13.47-9.91l-7.98 6.19C6.51 42.62 14.62 48 24 48z\"\/><\/svg>Add SimplyWise as a preferred source<\/a><\/p>\n<figure class=\"sw-a__hero-figure\">\n      <img decoding=\"async\" src=\"https:\/\/images.unsplash.com\/photo-1705579605238-24a90c8799c5?w=1400&#038;h=700&#038;fit=crop&#038;q=80&#038;auto=format\" alt=\"Technician in a hard hat and safety vest walking a commercial rooftop past a row of HVAC condensing units\" loading=\"eager\"><br \/>\n    <\/figure>\n<\/p><\/div>\n<\/section>\n<section class=\"sw-a__tldr\">\n<div class=\"sw-a__tldr-box\">\n<div class=\"sw-a__tldr-label\">HVAC certification path at a glance<\/div>\n<div class=\"sw-a__tldr-body\">\n<ol>\n<li>Finish high school or a GED, then pick a trade school HVACR program or a paid apprenticeship.<\/li>\n<li>Pass EPA Section 608, the one certification federal law requires before you touch refrigerant.<\/li>\n<li>Add an OSHA 10 card so commercial sites will put you to work.<\/li>\n<li>Stack NATE certification once you have field experience. It moves your rate.<\/li>\n<li>Check your state board. Contractor licensing varies by state and is the long game.<\/li>\n<\/ol><\/div>\n<div class=\"sw-a__tldr-cta\"><span>Going out on your own? Price a job in seconds.<\/span><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\">Price From a Photo<\/a><\/div>\n<\/p><\/div>\n<\/section>\n<section class=\"sw-a__body\">\n<div class=\"sw-a__inner\">\n<h2>The one HVAC certification federal law requires<\/h2>\n<p>There is exactly one <strong>HVAC certification<\/strong> required by federal law: EPA Section 608 Technician Certification. The <a href=\"https:\/\/www.epa.gov\/section608\/section-608-technician-certification-requirements\" target=\"_blank\" rel=\"noopener\">EPA<\/a> requires technicians who maintain, service, repair, or dispose of equipment that could release refrigerants to be certified. Every other credential, the OSHA 10 card, NATE, and your state contractor license, stacks on top of that single federal card.<\/p>\n<p>That makes the plan simple. Get the training, pass Section 608, get on a crew, then add the credentials that raise your rate. Every fact below traces to a primary source. The <a href=\"https:\/\/www.bls.gov\/ooh\/installation-maintenance-and-repair\/heating-air-conditioning-and-refrigeration-mechanics-and-installers.htm\" target=\"_blank\" rel=\"noopener\">Bureau of Labor Statistics<\/a> notes the EPA requires nearly all HVAC technicians to be certified in proper refrigerant handling, and projects the trade to grow 8 percent from 2024 to 2034, much faster than average. New to the business side? Start with our guide to <a href=\"https:\/\/www.simplywise.com\/blog\/how-to-start-an-hvac-business\/\">how to start an HVAC business<\/a>.<\/p>\n<h2>The 4 HVAC certifications and licenses that matter<\/h2>\n<p>Here is the full HVAC certification stack in the order you earn it. One row is federal and required. The rest are optional on paper, but they decide what you can legally take on and bill.<\/p>\n<ol class=\"sw-a__steps\">\n<li>\n<h3>EPA Section 608<\/h3>\n<p>The federal gate, the only one required by law. Pass an exam through an EPA-approved certifying organization before you handle refrigerant. Target Universal, which covers every equipment type.<\/p>\n<\/li>\n<li>\n<h3>OSHA 10 card<\/h3>\n<p>The jobsite card commercial work expects. The 10-hour course teaches hazard awareness for entry-level workers. It is voluntary federally, but many commercial general contractors require it before you set foot on site.<\/p>\n<\/li>\n<li>\n<h3>NATE certification<\/h3>\n<p>The credential that raises your rate. NATE is the certification dealers advertise and homeowners recognize, and how a working tech proves competence beyond the federal minimum. You earn it once you have field experience.<\/p>\n<\/li>\n<li>\n<h3>State contractor license<\/h3>\n<p>What lets you run your own jobs instead of working someone else&#8217;s. There is no national license, so requirements vary by state, and the experience clock is measured in years of documented experience.<\/p>\n<\/li>\n<\/ol>\n<p class=\"sw-a__inline-cta\"><a href=\"https:\/\/swcostestimator.app.link\/ce-ai\" target=\"_blank\" rel=\"noopener\">Price your next job from a photo, free &rarr;<\/a><\/p>\n<h2>EPA Section 608: the HVAC certification federal law requires<\/h2>\n<p>Section 608 has four types. Type I covers small appliances, Type II high and very high-pressure equipment, Type III low-pressure equipment, and Universal all of it. Most techs target Universal. Two EPA facts matter before you book. Section 608 credentials do not expire, so you pass once and hold it for a career. And the core test must be taken as a proctored exam to attain Universal Certification, so an open-book online core does not ladder up. It is often folded into a trade school HVACR program, which the Bureau of Labor Statistics says lasts 6 months to 2 years.<\/p>\n<h2>NATE and OSHA 10: the credentials that raise your rate<\/h2>\n<p>Once you are working, NATE is the certification customers recognize. It describes itself as the nation&#8217;s largest nonprofit certification organization for HVACR technicians and offers four levels of testing from entry to senior, with the professional exams and the Senior Level Efficiency Analyst exam designed for technicians with at least two years of practical experience.<\/p>\n<p>OSHA 10 is the safety card commercial sites expect. OSHA is clear that its Outreach Training Program is voluntary, does not meet the training requirements for any OSHA standards, and is not a certification. Even so, many commercial general contractors require the 10-hour card before you set foot on site, so treat it as mandatory for commercial work.<\/p>\n<h2>HVAC license requirements vary by state<\/h2>\n<p>There is no national HVAC license. Licensing is a state decision, and the rules differ widely. In most states a technician works under a licensed contractor, but whoever contracts directly with customers needs a state HVAC or mechanical contractor license backed by years of documented experience and an exam. Texas issues Class A and Class B ACR licenses, Florida splits every license into certified (statewide) and registered (local only), and California puts HVAC work under the CSLB C-20 classification. Keep records from day one, and see our <a href=\"https:\/\/www.simplywise.com\/blog\/texas-contractor-license\/\">Texas<\/a> and <a href=\"https:\/\/www.simplywise.com\/blog\/california-contractor-license\/\">California<\/a> guides.<\/p>\n<h2>When you start running your own jobs<\/h2>\n<p>Every credential in this guide points at the same day: the truck, the license, and the customer are yours. The skill that decides whether that business makes money is not brazing. It is estimating. A contractor who underbids a change-out by an hour of labor on every job gives the whole margin back.<\/p>\n<p>That is the job SimplyWise was built for. The SimplyWise Cost Estimator turns a photo into an itemized estimate in about 6 seconds, so you price the work on site and send the quote the same day, with receipt scanning and mileage tracking built in. It is free to try. Pass your 608, stack the certs, and have your estimating handled before the first customer calls your number instead of your boss&#8217;s.<\/p>\n<p style=\"text-align:center;margin-top:28px\"><a class=\"sw-a__btn\" href=\"https:\/\/swcostestimator.app.link\/ce-ai\" target=\"_blank\" rel=\"noopener\">Try the Cost Estimator Free<\/a><\/p>\n<div class=\"sw-a__sources\">\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.epa.gov\/section608\/section-608-technician-certification-requirements\" target=\"_blank\" rel=\"noopener\">U.S. EPA, Section 608 Technician Certification Requirements<\/a>: who must be certified, the four types, no expiration, proctored Core for Universal.<\/li>\n<li><a href=\"https:\/\/www.osha.gov\/training\/outreach\" target=\"_blank\" rel=\"noopener\">OSHA Outreach Training Program<\/a>: voluntary, does not meet any OSHA standard, 10-hour scope.<\/li>\n<li><a href=\"https:\/\/natex.org\/nate-exams\/getting-started\/\" target=\"_blank\" rel=\"noopener\">North American Technician Excellence (NATE)<\/a>: largest nonprofit HVACR certification organization, four testing levels, experience guidance.<\/li>\n<li><a href=\"https:\/\/www.bls.gov\/ooh\/installation-maintenance-and-repair\/heating-air-conditioning-and-refrigeration-mechanics-and-installers.htm\" target=\"_blank\" rel=\"noopener\">U.S. Bureau of Labor Statistics, Occupational Outlook Handbook<\/a>: refrigerant certification requirement, program length, 2024 to 2034 growth. Verified July 8, 2026.<\/li>\n<\/ul>\n<\/div><\/div>\n<\/section>\n<section class=\"sw-a__pull\">\n<blockquote><p>\n    Every tech on the truck has the 608 card. The federal minimum gets you hired. The stack on top of it, OSHA 10, NATE, the state license, decides what you bill.\n  <\/p><\/blockquote>\n<p>  <cite>SimplyWise Editorial<\/cite><br \/>\n<\/section>\n<section class=\"sw-a__faq\">\n<h2>Frequently asked questions about HVAC certification<\/h2>\n<div class=\"sw-a__faq-list\">\n<details>\n<summary>What HVAC certification is required by law?<\/summary>\n<div class=\"sw-a__faq-answer\">\n<p>EPA Section 608 Technician Certification is the only HVAC certification required by federal law. The EPA requires technicians who could release refrigerants while servicing or disposing of equipment to be certified. OSHA 10, NATE, and manufacturer certifications are optional at the federal level, and state license rules vary.<\/p>\n<\/p><\/div>\n<\/details>\n<details>\n<summary>Do you need a state license to do HVAC work?<\/summary>\n<div class=\"sw-a__faq-answer\">\n<p>It varies by state. Most states let a technician work under a licensed contractor, but whoever contracts directly with customers usually needs a state HVAC or mechanical contractor license backed by years of experience and an exam. Texas uses Class A and B, Florida splits certified from registered, and California uses the CSLB C-20 classification.<\/p>\n<\/p><\/div>\n<\/details>\n<details>\n<summary>How long does it take to get HVAC certified?<\/summary>\n<div class=\"sw-a__faq-answer\">\n<p>Per the Bureau of Labor Statistics, trade school HVACR programs generally last 6 months to 2 years with the EPA Section 608 exam typically included, so a new tech can be certified in roughly 1 to 2 years. NATE professional exams are designed for technicians with at least two years of field experience.<\/p>\n<\/p><\/div>\n<\/details><\/div>\n<\/section>\n<section class=\"sw-a__finalcta\">\n  <span class=\"sw-a__eyebrow\">For the day you go out on your own<\/span><\/p>\n<h2>Certs get you hired. Clean estimates keep you profitable.<\/h2>\n<p>The SimplyWise Cost Estimator turns job site photos into itemized estimates in about 6 seconds, with receipt scanning and mileage tracking built in. Free to try.<\/p>\n<div class=\"sw-a__cta-buttons\">\n    <a class=\"sw-a__btn\" href=\"https:\/\/swcostestimator.app.link\/ce-ai\" target=\"_blank\" rel=\"noopener\">Try SimplyWise Cost Estimator, free<\/a>\n  <\/div>\n<\/section>\n<\/article>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Article\",\n  \"headline\": \"HVAC Certification Guide: Which Ones You Need in 2026\",\n  \"description\": \"HVAC certification guide: EPA 608, NATE, OSHA 10, and state licensing, in the order you earn them, sourced from the EPA and BLS. 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There is no national license, so requirements vary by state, and the experience clock is measured in years of documented, supervised work.\"}\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"What HVAC certification is required by law?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"EPA Section 608 Technician Certification is the only HVAC certification required by federal law. The EPA requires technicians who could release refrigerants while servicing or disposing of equipment to be certified. OSHA 10, NATE, and manufacturer certifications are optional at the federal level, and state license rules vary.\"}},\n    {\"@type\": \"Question\", \"name\": \"Do you need a state license to do HVAC work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It varies by state. 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Sourced from the EPA, OSHA, NATE, and [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_linkdex":"91","_yoast_wpseo_content_score":"90","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","inline_featured_image":false,"footnotes":""},"categories":[182],"tags":[],"class_list":["post-7273","post","type-post","status-publish","format-standard","hentry","category-business-growth"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>HVAC Certification Guide: Which Ones You Need in 2026<\/title>\n<meta name=\"description\" content=\"HVAC certification: EPA 608, NATE, OSHA 10, and state licensing, in the order you earn them. Sourced from EPA and BLS. 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