NATE certification is a voluntary, two-year credential for HVAC technicians from North American Technician Excellence (NATE), an independent certifying organization.
It is not a government license, and no federal law requires it — the only certification HVAC work legally requires is EPA 608 for refrigerant handling, though local programs can add their own requirements.
You earn it by passing NATE's Core exam plus a specialty exam, or the five-part CHP-5 pathway, and you renew it every two years.
What is NATE?
NATE stands for North American Technician Excellence.
Lennox's HVAC glossary describes it as "an independent organization that certifies installation or service technicians through rigorous testing," and its program is built around exams: a certification for experienced technicians, plus two entry-level certificates.
It is an industry body, not a government agency — the same family of voluntary credentials as HVAC Excellence, ESCO and NCCER.
Voluntary is the operative word.
NATE's certification, like OSHA 10/30 cards, HVAC Excellence, NCCER and ASSE credentials, is an industry credential, not a government license — no federal law requires it.
Local rules are narrower but real: a state, city, or utility program can require NATE certification for its own purposes — some utility rebate programs, for example, pay out only when a NATE-certified technician does the work.
Moreno Valley Utility's AC and heat-pump tune-up rebate is one such program.
So check the rules where you work before you skip the credential or count on it.
NATE designs its certification for technicians with at least two years of experience, and the credential only stays current if you renew it — every two years, by NATE's rules (more on that below).
Do not confuse it with EPA 608.
Under the federal refrigerant rule (40 CFR 82.161), anyone who maintains, services, repairs, or disposes of appliances containing regulated refrigerants must pass an exam from an EPA-approved certification program — that is the legally required credential, and NATE certification does not substitute for it.
There is one overlap worth knowing: NATE is itself on EPA's list of approved 608 certifying programs, alongside ACCA, ESCO Institute, RSES, the United Association and others.
We break the full landscape down in our guide to which HVAC certifications you need, and the required card in detail on our EPA 608 certification page.
One naming trap before you pay for anything: NATE's own entry-level Ready-to-Work exam produces, in NATE's words, "a certificate, not a NATE certification."
The certificates and the certification are different products with different exams, prices and validity periods — the next section separates them.
What exams make up NATE certification? Core, specialty, and CHP-5
NATE's certification has two pathways — its word — and both end at the same certification.
The Traditional pathway is the Core exam plus one Specialty exam.
The core exam runs 50 questions; the specialty exam runs 100 questions.
The CHP-5 pathway spreads the material over five exams instead:
- HVAC Fundamentals
- Electrical and Controls
- Comfort and Airflow
- Installation
- Service
Each CHP-5 exam is 30 questions — five 30-question exams in place of the 50-question core and 100-question specialty — and you can take up to six months between them.
NATE's exams are administered through testing organizations, which are also where you book.
The specialty list is where you match the exam to your work.
NATE's senior-level exam names the service specialties in its approved pairings — Air Conditioning plus Air Distribution, Gas Heating, Oil Heating, Hydronics Gas, or Hydronics Oil are its examples.
That senior exam, the Senior Level Efficiency Analyst, is open book — you can use any of your own materials during it — and requires two service specialty certifications in approved pairings.
NATE also offers a Low-GWP Refrigerants exam aimed at the new lower-global-warming-potential refrigerants.
It is a voluntary credential — not a legal requirement — and it does not replace the EPA 608 card for refrigerant handling.
Then the two products that are not the certification.
The Ready-to-Work Certificate is an entry-level, online, unproctored exam costing $60, with $45 retakes.
Passing earns a certificate — NATE's pages say explicitly that it is "not a NATE certification" — valid for 5 years, renewed by retaking the exam.
The HVAC Support Technician Certificate is aimed at technicians with 6–12 months in the field; it is proctored at a testing organization and is also valid for 5 years.
Neither is the two-year certification this page is about.
How much does NATE certification cost?
There is no single national NATE exam price.
NATE's own fee schedule covers recertification and says plainly that if you recertify by retesting instead, the fee is determined by the testing organization — so the exam price you pay depends on where you test.
Ask when you book.
The published numbers:
- Ready-to-Work certificate exam — $60, retakes $45.
- Recertifying with continuing education hours (CEHs) — $30 for the first specialty, plus $5 for each different specialty: $35 for two specialties, $40 for three.
Those CEH fees are the only recertification fees NATE publishes; the retesting route costs whatever the testing organization charges.
Fees and policies change — confirm with NATE
How often do you recertify NATE?
Every two years.
NATE certifications must be renewed — by submitting 16 continuing education hours (CEHs) or by retaking the specialty exam — before the end of the two-year certification period.
The CEH route costs NATE's published recertification fee ($30 plus $5 per additional specialty); the retesting route costs what the testing organization charges.
What happens if you miss the deadline is the one place NATE's own pages disagree.
One page describes a 120-day grace period to recertify after the expiration date.
The policies page — more recently updated — says an expired technician is no longer NATE-certified and must retake the Core exam (where it was required) and the specialty exam.
Because NATE's pages conflict, don't plan around a grace period: renew inside the two-year window, or confirm the current lapse rules with NATE directly before you rely on either reading.
How to look up a NATE certification
A NATE certification is only as current as its last renewal — the two-year clock means a card from three years ago is a card for a lapsed certification.
So "NATE certified" is worth verifying rather than assuming, whether you are the technician proving it or the person checking it.
Our research did not confirm the details of a public NATE certification-verification service, so we can't point to a specific lookup tool.
What any verification has to establish is whether the technician's certification is inside its current two-year window and which specialty exams they passed.
To confirm a certification status, contact NATE directly through its website at natex.org.
Do employers ask for NATE certification?
What the certification tells an employer is specific: the technician passed NATE's core and specialty exams (or the CHP-5), a program designed for at least two years in the field, and has kept the credential current within the last two years — 16 CEHs or a fresh specialty exam.
That is a different signal from the entry certificates, which say a tech is ready to start, not that they have two years behind them.
How often contractors actually require or prefer NATE is not something we can quantify for you — no source we can cite publishes a count, and requirements vary shop to shop.
The fastest calibration is live postings in your own market: browse HVAC technician jobs and note how often "NATE certified" appears alongside EPA 608, which is the credential every refrigerant-handling tech needs.
As for which credential fits your stage: if you are new, the certificates — Ready-to-Work online at $60, or the proctored Support Technician exam once you have 6–12 months in the field.
If you are at the two-year mark, the certification itself, via Core plus a specialty or the CHP-5.
This page is career information, not legal or licensing advice. NATE's exam structures, fees, and renewal rules are NATE's own policies and change over time — confirm current requirements with NATE, and confirm any licensing question with your state or local licensing board.