HVAC Certification: EPA 608, NATE, and a School Certificate

By SubcontractorHub Editorial Team·Published August 2026·Updated November 2026

How to get HVAC certification depends on which document you mean. A tech who can buy refrigerant still cannot pull a permit in a state that licenses contractors. An owner who holds the license still needs certified people on the refrigerant work. This page keeps those papers apart. It does not print a wage bump, because no pay figure was fetched for a certification.

EPA Section 608 Is the Federal HVAC Certification for Refrigerant

EPA's Section 608 certification page, fetched the day this article was updated, says regulations under Section 608 of the Clean Air Act require that technicians who maintain, service, repair, or dispose of equipment that could release ozone-depleting refrigerants must be certified. It says that starting January 1, 2018, this requirement also applies to appliances containing most substitute refrigerants, including HFCs. Technicians pass an EPA-approved test. The tests are specific to the type of equipment. An EPA-approved certifying organization administers them. The credentials do not expire.

The requirements page defines a technician as a person who attaches and detaches hoses and gauges to measure pressure within the appliance, adds or removes refrigerant, or does any other activity that violates the integrity of a motor-vehicle-air-conditioner-like appliance or a small appliance, other than disposal. Apprentices are exempt if they are closely and continually supervised by a certified technician. That exemption is not a card you keep after the supervisor leaves.

The same page says EPA has developed four types of certification. Type I is for servicing small appliances. Type II is for servicing or disposing of high- or very high-pressure appliances, except small appliances and MVACs. Type III is for servicing or disposing of low-pressure appliances. Universal is for servicing all types of equipment. The page says a core test taken as an open-book exam cannot be used to get Universal certification. The core test must be a proctored exam to attain Universal. A practice set for that test is the EPA 608 practice test. This article does not add a pound limit the requirements page did not print in the type list.

NATE Is a Different HVAC Certification

NATE's homepage, fetched the day this article was updated, says NATE is the nation's largest nonprofit certification organization for heating, ventilation, air conditioning, and refrigeration technicians. That is NATE's description of itself. The same homepage displayed counts of 5,113 contractors, 41,759 technicians, and 6,124 testing organizations. Those are the figures on the page that day. They are not an audit this site performed.

The homepage navigation includes exams, a way to find a testing location, recognized training providers, and recertification. Recertification on that menu includes earning training hours and paying recertification fees. The dollar amount of the fee was not on the homepage text fetched here, so this page does not print one. Section 608 credentials do not expire. NATE, on its own menu, has a recertification path. Those are not the same rule. Do not tell a tech that a NATE card lasts for life because the EPA card does.

NATE is not a substitute for 608, and 608 is not a substitute for NATE. An owner who wants both on a hiring note should name both. This page does not say NATE raises a wage. Pay figures that were fetched for technicians, without a certification premium, are on HVAC technician salary. The path into the trade, including apprenticeship, is how to become an HVAC technician and HVAC apprenticeship.

A School Certificate Is Not the License

A training program can hand you a certificate when you finish the hours the school set. That paper shows the program. It does not, by itself, satisfy the EPA sentence about an approved certifying organization, and it does not satisfy a state board. How to get HVAC certification in a classroom still leaves the federal test and, where the state requires it, the license.

The state permission to contract the work is how to get an HVAC license. California, Texas, and North Carolina do not share one hour count on that page. Putting "certified" on a van when the document is a school diploma, and the state wanted a contractor license, is the mix this update is written to stop.

What Should the HVAC Certification File Hold?

Five lines keep the papers from being treated as one card.

1. Which document: EPA 608, NATE, or a school certificate.
2. For 608, the type: I, II, III, or Universal, and that Universal's core was proctored.
3. For NATE, that recertification is a separate path on NATE's site, with the fee read there and not guessed here.
4. The state license, if the person will contract work, on its own line.
5. What you did not claim: no wage premium, no exam price, and no statement that one card replaces the others.

Where Certification Sits on the Job

Hiring notes should name the card the work needs. A service tech who opens a sealed system needs the 608 type that matches the equipment. A comfort advisor who never gauges a system does not become certified by standing next to that tech. The scorecard for the interview, which does not print a wage, is HVAC interview questions.

The shop that schedules the certified tech and the install is HVAC contractor software. This page does not say a certificate will be accepted by a board, and it does not price the test.

Frequently Asked Questions