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Quick answer: Yes, if you want to install or service air con, split heat pumps or refrigeration, because the law requires it for that work. If you only fit sealed monobloc heat pumps, you can skip it. A Category 1 course takes four to five days and costs roughly £1,000 to £1,200 plus VAT.
Here’s what it covers, what it costs and how to decide whether it’s right for your business.
What Is An F-gas Qualification?
F-gases (fluorinated greenhouse gases) are the refrigerants used in most air conditioning, refrigeration and heat pump equipment. R410A and R32 are the two you’ll meet most often on air con and heat pump jobs. They’re powerful greenhouse gases, which is why the rules around handling them are strict.
An F-gas qualification proves you’re competent to handle those refrigerants safely: connecting and charging a system, recovering gas, and checking for leaks without letting it escape. In Great Britain you need your own personal qualification to work on equipment containing F-gas, even if you work for someone else. It’s separate from Gas Safe, which covers gas appliances, not refrigerant circuits.
The qualification comes in four categories. Which one you need depends on what you’ll be doing and how big the systems are:
| Category | What It Lets You Do |
|---|---|
| Category 1 | All activities, on systems of any size |
| Category 2 | Install, maintain, service and recover refrigerant on systems with under 3 kg of F-gas (under 6 kg if hermetically sealed) |
| Category 3 | Recover refrigerant only, on systems with under 3 kg (under 6 kg if hermetically sealed) |
| Category 4 | Leak check only, as long as you don’t break into the refrigerant circuit |
The qualification is awarded by approved bodies such as City & Guilds (the 2079 award) and LCL Awards, and takes the form of a short course with theory and practical assessment. For most engineers adding air con or heat pump work, Category 1 is the one to go for, because it removes any limit on the size of system you can work on.
What Can You Do With F-gas?
The short version: anything that involves opening, joining, charging or recovering gas from a refrigerant circuit. In practice that means:
- Installing split-system air conditioning, where the indoor and outdoor units are joined by refrigerant pipework that has to be connected, tested and charged on site
- Installing split heat pumps, which work the same way
- Servicing and repairing air con and heat pumps, including any job that breaks the sealed refrigerant circuit
- Leak checking and recovering refrigerant
- Refrigeration work, such as cold rooms and display cabinets
That opens up the recurring work as well as the installs. Larger systems need regular leak checks and records, which is a natural fit for service and maintenance contracts.
F-gas Training Costs And Course Length
A Category 1 F-gas course usually runs four to five days and costs roughly £1,000 to £1,200 plus VAT. Most providers quote prices before VAT and prices change, so get a quote. The figures here come from provider listings we checked in November 2026.
| What | Typical Figure | Worth Knowing |
|---|---|---|
| Category 1 course | About £1,000 to £1,200 plus VAT | Four to five days, theory plus practical assessment. Providers we checked in November 2026 listed £995 to £1,195 plus VAT. Some run a faster four-day version for engineers with a couple of years’ experience |
| Category 3 or 4 course | Usually shorter, around two days | Recovery only (Cat 3) or leak checking only (Cat 4). Check the price with your provider |
| Company certification | Annual fee, set by the certification body | Needed if you service equipment operated by others, sole traders included |
| Time off the tools | Four to five days for Category 1 | Plan for revision time too |
Two things are worth knowing before you book.
It isn’t a formality. Colleges that run the course are upfront that F-gas is challenging and a pass isn’t guaranteed, so give the theory some attention beforehand rather than turning up cold.
Funding may be available. Some colleges offer funded or reduced-rate places depending on your circumstances, so ask your local provider before paying full price.
Don’t Forget Company Certification
Your personal qualification isn’t the only thing. If your business services equipment operated by other people, you also need company certification from an approved certification body. That includes sole traders. If you only ever service your own equipment, you don’t need company certification, but you still need the personal qualification. Factor the annual fee into your costs when you work out whether the numbers stack up.
Is F-gas Worth It? The Case For And Against
The Case For
Demand for heat pumps is real, though lumpy. Government grants are the main driver. The Boiler Upgrade Scheme in England and Wales pays £7,500 towards an air-to-water or ground source heat pump, plus a temporary £9,000 for eligible off-gas homes replacing oil or LPG heating (21 July 2026 to March 2027). Government data showed a record 8,150 grant applications in July 2026. The picture isn’t a straight line up, though: retrofit heat pump installations fell 22% in the first quarter of 2026 compared with the same period in 2025.
There’s a grant for air-to-air heat pumps too. The scheme now pays £2,500 towards an air-to-air heat pump, which is essentially air con that heats as well as cools. These are split systems, so fitting one means working on the refrigerant circuit, and that needs F-gas.
Air con and refrigeration engineers are consistently wanted. F-gas qualification is a standard requirement in job adverts for the trade. Based on job adverts we reviewed in November 2026, experienced air con and heat pump engineer roles were advertised at around £40,000 to £60,000 in London and the south-east, though average pay across the trade is lower. These are advertised salaries, not guarantees. As a self-employed engineer, what you earn depends on the work you win and what you charge.
It lets you keep the whole job. If you’re already fitting heating, being able to handle the refrigerant side yourself means you aren’t turning away or subcontracting split-system and air con work.
It builds repeat work. Systems that need regular leak checks and records give you a reason to be back every year.
The Case Against
The course isn’t free, and neither is the time. Count the course fee, the days off the tools and the annual company certification fee, not just the first.
You may not need it yet. If your heat pump work is all sealed monoblocs and you’re not interested in air con, the qualification may not pay for itself straight away.
The heat pump market has been uneven. Grants drive volume, so demand can swing when schemes change.
A Quick Way To Decide
Work out your break-even with your own numbers: add up the course fee, time off the tools and first-year company certification, then divide by what you’d make on a typical install or service call. If you can see yourself winning a handful of those jobs a year, the maths usually works. If you can’t, wait.
Who Needs An F-gas Qualification?
| If You… | Do You Legally Need F-gas? | Is It Worth Considering? |
|---|---|---|
| Want to install or service split-system air con | Yes | Yes. It’s the entry ticket to the work |
| Want to install split heat pumps | Yes | Yes |
| Want to service heat pumps, including anything that breaks the refrigerant circuit | Yes | Yes, if servicing is part of your offer |
| Only fit sealed monobloc heat pumps and never break the seal | No | Optional. Useful if you want to grow into servicing or split systems later |
| Only do leak checks and don’t break into the circuit | Category 4 is the relevant qualification | Worth it if leak checking is the whole service |
| Wire up air con or heat pump controls but never touch refrigerant | No | Only if you plan to take on the refrigerant side |
| Work purely on gas appliances and boilers | No | Only if you want to diversify |
The common thread is simple. If the job involves refrigerant, you need it. If it doesn’t, you don’t, and the real question is whether you want to move into that kind of work.
How To Get F-gas Qualified: Step By Step
- Decide your category. If you’ll work on air con or heat pumps of different sizes, choose Category 1. If you only ever work on small systems, or only need recovery or leak checking, a lower category may be enough.
- Find an approved provider. GOV.UK lists the organisations that award F-gas qualifications. Many colleges and private training centres run the courses, so compare dates, price and location.
- Check the entry requirements. Some intensive courses expect a couple of years’ experience in the industry and may ask for evidence. Others are open to beginners over a longer course.
- Do some revision beforehand. Brush up on the theory side before your course date so you aren’t learning it from scratch on day one.
- Attend the course and pass the assessments. Expect theory and practical assessment across four to five days for Category 1.
- Get company certification if you need it. If you service equipment operated by others, apply to an approved certification body. GOV.UK lists them.
- Set up your records from day one. You’ll need to record the gas in each system, any gas added or recovered, and the results of leak checks. Starting with a tidy process is far easier than catching up later.
What F-gas Asks Of You Once You’re Qualified
The qualification is the start. After that come the working obligations: leak checks at set intervals for larger systems, repairs followed by a re-check, and records you keep for at least five years. The detail depends on how much refrigerant is in the system and which gas it is, so it’s worth understanding before your first job rather than after.
If you already use Powered Now, the new F-Gas Leak Inspection Record lets you complete the leak check on your phone while you’re on site, and it’s saved against the job and the customer. See how it works.
This guide summarises the GB rules as of November 2026. For the full requirements, see the F-gas guidance on GOV.UK.
