How to Get EPA 608 Certified

Under 40 CFR Part 82, Subpart F, anyone who could reasonably be expected to violate the integrity of the refrigerant circuit while maintaining, servicing, repairing or disposing of an appliance must be certified (40 CFR 82.161(a)). The regulation's definition of a technician (40 CFR 82.152) lists the activities that count, and it is broader than many people expect.

Painting a unit, rewiring an external electrical circuit, replacing pipe insulation or tightening nuts and bolts does not count. Work on motor vehicle air conditioners falls under a different program, Section 609. People who only dispose of small appliances, MVACs and MVAC-like appliances do not need to be certified (40 CFR 82.161(a)(1)(vii)).

There are two exceptions for people still learning. A registered apprentice may work without certification while closely and continually supervised by a certified technician, for up to two years from first registering with the U.S. Department of Labor's Office of Apprenticeship or a recognized State Apprenticeship Council (40 CFR 82.152, 82.161(a)(2)). Students may also do laboratory work as part of a formal course before they are certified. EPA's Q&A is clear that on-the-job training outside that kind of coursework is service work and needs certification.

• Attaching or detaching hoses and gauges to measure pressure
• Adding refrigerant to, or removing it from, an appliance
• Adding or removing components, or cutting a refrigerant line
• Installing a mini-split when that means adding or removing refrigerant, or connecting or disconnecting hoses or pre-charged lines (EPA Q&A)

EPA certifies by type of equipment, not by refrigerant (40 CFR 82.161(a)(1)). Every test has a Core section plus at least one type section. EPA's test-topics page calls Type II 'High-Pressure', but the regulation covers medium-, high- and very high-pressure appliances under Type II, so a technician working on R-134a equipment that is not a small appliance needs Type II.

There is no separate 'R-410A certification' from EPA. EPA's Q&A notes that some schools offered R-410A courses, but they are not equivalent to Section 608 certification.

Each section has 25 multiple-choice questions, drawn from a bank of questions EPA developed and releases only to approved certifying programs (40 CFR 82.161(c)). You need 70 percent on each section to pass a closed-book test. The one exception is the mail-in Type I format, where the pass mark is 84 percent (Appendix D to Subpart F, section e).

Universal can be earned in one sitting or by combining passing scores on separate Type I, Type II and Type III tests. Either way, every part must be passed closed-book, proctored and in a secure setting. A mail-in Type I and a Core section taken open-book cannot count toward Universal (Appendix D, section a; EPA: Certification Requirements).

Programs are encouraged to offer tests in other languages or allow a translator. If you need the test given orally, you can ask the program in writing at least 30 days before your test date and explain why (40 CFR 82.161(b)(3)).

Match the certification to the equipment you work on now and expect to work on. Refrigerant purchases follow your certification too. EPA's sales-restriction page says individuals may only buy refrigerant consistent with the appliances their certification covers.

• Household refrigerators and freezers, window and room units, PTACs, dehumidifiers, water coolers, vending machines and under-counter ice makers, when factory-sealed with 5 pounds or less: Type I.
• Residential split systems and heat pumps, including ductless mini-splits joined on site with line sets (EPA has not named them; that is a reading of the small-appliance definition), rooftop units, commercial and supermarket refrigeration, and chillers that use medium- or high-pressure refrigerants such as R-22, R-410A or R-134a: Type II.
• Low-pressure centrifugal chillers using refrigerants such as R-11, R-123, R-113 or R-245fa: Type III.
• Mixed or uncertain work, or a career in the trade: Universal. You take Core once, then add each type section, either all at once or one at a time.

EPA does not give the test, issue cards or set fees. Tests must be given by an EPA-approved certifying organization (EPA: Certification Requirements). EPA publishes the list of approved programs with contact details. As of its October 27, 2026 update it lists 87 programs, including national testing organizations, trade associations, unions, trade schools, community colleges and military training units.

Some programs on the list are marked with an asterisk, which means they are only for that company's own employees. Some programs test at locations nationwide. Others are tied to one school or training center. Certificates issued by programs that no longer test are still valid.

EPA does not review or approve training courses or study materials, only the certifying programs. If a provider sells a course and a test together, the test part must be run separately from the training (Appendix D, section h).

Yes, you can test online. EPA's program list marks the organizations that offer remote testing, and a few are marked as online-only. Remote testing means you do not travel to a test site. For Type II, Type III and Universal it is still a proctored, closed-book exam with identity checks, because the rules for those tests do not change with the format.

Under Appendix D, proctors must check photo identification, such as a driver's license, government ID, passport or military ID. They must also make sure you use no notes or training materials. Expect an online provider to watch you on camera and to have rules about your room and screen. Ask before you book which types they offer online and what equipment you need.

The other remote option is the mail-in Type I test. It is an unproctored format allowed only for Type I-only programs, with an 84 percent pass mark. It cannot be used toward Universal. Only one program on EPA's October 2026 list is marked as offering it, and most Type I programs test on-site.

There is no federal fee. Each certifying organization sets its own price, and the regulation only says programs may charge 'reasonable fees' for giving the test (Appendix D, section a). Prices vary with the provider, the number of types you take, whether you test online or in person, and whether you buy training or a study manual with it.

When you compare providers, check what is included: the test itself, retakes, the card, a replacement card, and any study material. EPA publishes no study guide of its own. Free practice is available, including the practice tests on this site for Core, Type I, II, III and a 100-question Universal mock.

Programs must tell you your results within 30 days of the test and issue a wallet-sized card within 30 days. For mail-in Type I, both deadlines run from when the program receives your completed test (Appendix D, sections e and f). The card shows the certifying program and the date it was approved, your name, your certification type and a unique number that is not your Social Security number.

You must keep a copy of your certificate at your place of business, and keep it until three years after you stop working as a technician (40 CFR 82.161(a)(4)). EPA does not require you to carry the card on the job, though EPA suggests keeping a photo of it on your phone in case a customer asks. Since 2018, most programs must also publish an online list of technicians they have certified since January 1, 2017, and you can ask to be left off it (40 CFR 82.161(b)(6)).

If you lose the card, contact the organization named on it, not EPA. EPA keeps no national database of technicians. If you don't remember who certified you, EPA suggests checking old receipts, certificates, employers, refrigerant suppliers, state licensing records and people you tested with. If you have documentation of your certification, EPA's lost-card page names ESCO Institute as an organization that will replace cards. It still lists Ferris State University too, but EPA's list of former programs shows Ferris State voluntarily withdrew on May 22, 2026, and Ferris says it moved its records to ESCO Institute. If the organization that certified you has closed and is on EPA's list of closed programs, EPA asks you to contact EPA through its contact form. With no documentation at all, you will need to retake the test.

Section 608 certification does not expire and has no renewal fee or continuing-education requirement (EPA: Certification Requirements). EPA has kept the right to require recertification in the future by notice in the Federal Register, but has not done so (40 CFR 82.161(a)(5)).

Certification can be lost. EPA may ask a technician to show at their place of business that they can recover or recycle refrigerant properly. Failing to show this, or breaking the Subpart F rules, can lead to suspension or revocation, and a technician whose certificate is revoked must recertify (40 CFR 82.161(a)(3)). Your state or city may also have its own licensing rules on top of the federal credential.