HVAC & Refrigeration F-Gas Certificate (C&G 2079)

What it is

Heating, ventilation, air-conditioning and refrigeration (often shortened to HVAC or RACHP) covers the systems that keep buildings cool, food cold and, increasingly, homes warm through heat pumps. To touch the refrigerant gas inside any of this equipment you must hold an F-Gas certificate. The main one is the City & Guilds 2079 award, and Category I is the broadest because it lets you work on systems of any size.

Who it suits

This trade suits practical people who like working with their hands, tools and machinery. It is a good fit if you enjoy problem-solving, do not mind travelling between sites, and are comfortable working at heights or in plant rooms. A background in plumbing, electrical work or general maintenance transfers well. It is physical work, so reasonable fitness helps.

How you qualify

1. Take an F-Gas Category I course (usually 4 to 5 days) and pass the written and practical exams.
2. For proper jobs, work towards an NVQ Level 2 or 3 in Refrigeration and Air Conditioning, often through an apprenticeship or on the job.
3. Build real experience under a qualified engineer. Many also add heat-pump and electrical qualifications to earn more.

Cost and how long it takes

The F-Gas Category I course on its own is roughly £900 to £1,500. If your employer pays or you go through an apprenticeship, it can cost you nothing. A private NVQ adds more. The certificate can be earned in about a week, but becoming a trusted, employable engineer usually takes one to two years of training and hands-on experience.

The English you need

You need around intermediate English. The F-Gas exam is a written multiple-choice test of about 40 questions on regulations and safety, and the job means reading manuals, wiring diagrams and safety notices. You do not need perfect English, but a beginner will struggle with the exam and the paperwork. If your English is very basic, take an ESOL course first, then start the training.

The honest reality

Be careful of adverts promising a "career in a week" for a few hundred pounds. The F-Gas certificate is real and legally required, but on its own it will not make you an employable engineer. Employers want the certificate plus an NVQ plus genuine experience. Without those, the paper certificate alone rarely leads to good-paying work. Treat any short course as the first step, not the finish line.

What you can earn

Pay is strong for this trade. Estimates for 2026 put employed refrigeration and air-conditioning engineers at around £32,000 to £45,000, with experienced and commercial specialists reaching £50,000 or more. Self-employed and heat-pump specialists in London and the South East can earn the most. These are estimates, not guarantees, and depend on your skills, tickets and location.

Your next step

Search for "F-Gas Category 1 course" near you and compare training centres, or look for a refrigeration apprenticeship if you want your training paid for. If your English is not yet at intermediate level, book an ESOL class first. Then get the F-Gas certificate, find work under an experienced engineer, and build towards your NVQ.