F Gas Certificate: Categories, How to Get One, and Penalties

An F-gas certificate is the legal credential that lets you install, service, leak-check, or recover refrigerant from equipment containing fluorinated greenhouse gases. In the UK and EU you earn one by passing an assessment through an accredited body in one of four categories tied to the work you do and the size of the equipment. In the United States the equivalent is EPA Section 608 certification, issued in four types under the Clean Air Act. Working on refrigerant-containing systems without the right certificate is illegal in all three jurisdictions.¹

Which Category or Type You Need

Before booking an assessment, work out which credential matches the job you actually do. The UK and EU use four categories set out in EU Implementing Regulation 2015/2067, and the UK kept the same structure after Brexit.

Category I is the broadest. It covers leak checks, recovery, installation, and maintenance on systems of any size. This is the standard credential for refrigeration engineers and HVAC technicians who need full access.
Category II covers the same activities as Category I but only on systems containing less than 5 tonnes of CO2 equivalent, and only where leak checking doesn’t require breaking into the refrigeration circuit.
Category III is limited to recovering refrigerant from systems containing less than 3 kilograms of F-gases, or 6 kilograms for hermetically sealed equipment. It doesn’t authorize installation or maintenance.
Category IV only covers leak checks on equipment where you don’t break into the refrigeration circuit. No recovery, charging, or installation.

The EU’s updated Regulation 2024/573 expands certification beyond F-gases to cover natural refrigerants including hydrocarbons, CO2, and ammonia, with six certificate types under the new framework. Certificates issued under the previous regulation remain valid.²³

The US Section 608 system splits differently, by appliance class:

Type I covers small appliances containing less than 5 pounds of refrigerant, such as household refrigerators, window air conditioners, dehumidifiers, and small ice makers.
Type II covers medium- and high-pressure appliances other than small appliances and motor vehicle air conditioning: residential split systems, rooftop packaged units, commercial cold storage.
Type III covers low-pressure appliances such as large commercial chillers and central plant systems in hospitals or universities.
Universal combines all three into one credential.

Apprentices working under the close, continuous supervision of a certified technician are exempt while training.¹

How to Get Certified in the UK

To earn a UK F-gas certificate you pass an assessment through an accredited organization. The main bodies are City and Guilds, the Building Engineering Services Association (BESA), and LCL Awards. Each offers its own qualification, but all follow the same regulatory standards. City and Guilds 2079 is probably the most widely recognized.⁴

The assessment has two parts. A written exam covers environmental regulations, refrigerant properties, and safety procedures. A practical test asks you to demonstrate hands-on skills such as brazing, system charging, and leak detection under an examiner’s observation.

For Category I, most training courses run about five days and cost roughly £800 to £1,200 depending on the provider and location. Lower categories are shorter and cheaper because the scope is narrower. Candidates should have a reasonable grasp of basic refrigeration principles and be comfortable with hand tools before starting. Some centers require evidence of prior industry experience, particularly for Category I. Once you pass both components, the center submits your results and you receive your certificate, typically within a few weeks. Your name goes on a register that employers and regulators can check.

Renewing a UK Certificate

UK F-gas certificates must be renewed every five years. Revalidation is shorter than the original qualification, usually a single day, and involves a refresher assessment on current regulations and updated refrigerant knowledge. If your certificate lapses you have a 12-month grace period to complete revalidation. After that window closes, you have to sit the full assessment again from scratch.

How to Get Certified in the US

Section 608 exams are administered by EPA-approved testing organizations. The EPA approves programs but doesn’t review or endorse their training materials, so exam quality is standardized while study resources vary. Major approved organizations include ESCO Institute, the Air Conditioning Contractors of America (ACCA), and Ferris State University, among dozens of others. Several offer remote or online proctored testing.⁵

The exam has a core section plus one section for each type you want. Each section is 25 questions, so the Universal exam runs 100 questions. Passing is 72 percent per section on a proctored exam, or 84 percent open-book. One catch: the core section must be taken as a proctored, closed-book exam to qualify for Universal certification.¹

Online proctored exams are available through certain approved organizations around the clock. You’ll need a webcam, microphone, government-issued ID, and a clear workspace with no other people present. No calculators are permitted, and you generally have up to three hours to finish.

Cost is modest compared with UK qualifications. Bundled study materials and exam fees typically run between $50 and $300. Some organizations charge separately for study guides ($40 to $200) and the proctored exam itself ($50 to $120). Retake fees vary and may be free or cost up to $120.

Section 608 credentials do not expire. Once you pass, the certificate is valid for life. If you lose the card, contact the organization that tested you. If that organization no longer exists, ESCO Institute and Ferris State University will issue a replacement if you can provide documentation such as a copy of the original card or employer records. Without any documentation or verification, you have to retake the exam.⁶

Company Certification and Refrigerant Purchases

Individual certification alone isn’t enough to run a UK service business. Your company must hold a separate company certificate from an approved body, either Refcom or F-Gas Register (operated by Quidos). To qualify, the business must employ enough certified staff to handle its workload and maintain a written procedure for safely handling F-gases and minimizing emissions. Company certification is renewed every three years.⁷

The US has no direct equivalent, but refrigerant sellers must verify Section 608 or 609 certification before completing a sale and must keep invoices showing the buyer’s name, sale date, and quantity purchased for at least three years. If a buyer is uncertified and purchasing on behalf of a facility, the seller needs written evidence that the facility employs at least one certified technician, and must stop selling to that facility if notified the certified technician no longer works there.⁸

Penalties for Working Without a Certificate

In the UK, working with F-gas without the correct individual or company certification is a criminal offense under the Fluorinated Greenhouse Gases Regulations 2015. Enforcement includes civil penalties, and for company certification violations GOV.UK directs businesses to the Environment Agency’s enforcement sanctions policy.⁷

US penalties are more precisely documented. Section 608 prohibits intentionally venting ozone-depleting refrigerants and their HFC substitutes during maintenance, servicing, repair, or disposal of equipment.⁹ Civil penalties can reach $44,539 per day per violation. Criminal violations under Section 113 of the Clean Air Act carry fines up to $1,000,000 per violation.¹⁰ The EPA pursues enforcement against individual technicians and small companies, not only large corporations.

There’s a practical penalty as well. Without certification you can’t legally buy the refrigerant you need to do the work. UK wholesalers are prohibited from selling bulk refrigerant to uncertified companies, and US retailers must verify certification before any sale.⁸

1
US EPA. Section 608 Technician Certification Requirements
2
European Commission. F-gases: new rules on labelling, reporting, certification and the F-gas Portal
3
European Commission. Regulation (EU) 2024/573
4
GOV.UK. Qualifications to work with F gas
5
US EPA. Certification Programs for Section 608 Technicians
6
US EPA. Steps For Replacing a Lost Section 608 Technician Certification Card
7
GOV.UK. Company certification to work with F gas
8
US EPA. Recordkeeping Requirements for Refrigerant Retailers
9
US EPA. Stationary Refrigeration and Air Conditioning
10
Office of the Law Revision Counsel. 42 US Code 7413 – Federal enforcement