F-Gas Regulations: What Installers Need to Know in 2026

Why F-Gas Still Matters in 2026

The UK F-Gas regime isn't new, but it keeps tightening. Since Brexit, Great Britain operates its own fluorinated greenhouse gas framework — separate from the EU's F-Gas Regulation — under the Fluorinated Greenhouse Gases Regulations 2015 (as amended). Northern Ireland continues to follow EU rules under the Windsor Framework.

If you work on air conditioning, heat pumps, refrigeration, or any system containing hydrofluorocarbons (HFCs), you need to understand what's changed, what's coming, and what will land you in hot water with the Environment Agency.

The HFC Phase-Down: Where We Are Now

The UK's HFC phase-down is a legally binding schedule to reduce the total volume of HFCs placed on the market, measured in CO₂-equivalent (CO₂e) tonnes. The baseline was set in 2015, and supplies have been shrinking every few years since.

By 2026, the UK market is operating at significantly reduced HFC quota levels compared to the 2015 baseline. In practice, this means:

• Refrigerant prices are higher — particularly for high-GWP refrigerants like R-410A (GWP: 2,088) and R-404A (GWP: 3,922)
• Supply is not guaranteed — ordering virgin refrigerant at short notice is increasingly difficult
• Reclaimed refrigerant is exempt from quota, making proper recovery more commercially valuable
• Low-GWP alternatives like R-32 (GWP: 675), R-290 (propane), and R-454B are now the industry direction of travel

Certification: Who Needs What

F-Gas work requires certification at two levels: company certification and individual engineer certification. Both are mandatory and non-negotiable.

Individual Certification

Engineers must hold a recognised refrigerant handling qualification. In the UK, the most widely accepted route is the City & Guilds 2079 award, which covers:

• Category I — all activities on systems of any size
• Category II — installation and servicing of systems under 3 kg of refrigerant (6 kg if hermetically sealed)
• Category III — refrigerant recovery from systems under 3 kg (6 kg if hermetically sealed)
• Category IV — leak checking only, without breaking into the refrigerant circuit

Most AC and heat pump engineers need Category I. Your certificate must come from an approved assessment body. There is no expiry date on UK F-Gas certificates, but your business must also hold company certification (see below) to legally carry out F-Gas work.

Company Certification

Even if you're a sole trader, your business must be registered with an approved certification body. In practice, this means joining a scheme such as:

• REFCOM — the most widely recognised UK F-Gas company register
• ACRIB — the Air Conditioning and Refrigeration Industry Board scheme
• Other bodies approved by the Environment Agency

Company certification typically involves an audit of your equipment (recovery machines, leak detectors, gauges) and your record-keeping systems. Annual renewal is required.

Leak Checks: The Thresholds You Must Know

One of the most frequently misunderstood areas of F-Gas compliance is leak checking. The requirement is based on the CO₂-equivalent charge of the system — not the weight of refrigerant alone. To calculate CO₂e: multiply the refrigerant charge in kg by the refrigerant's GWP.

Example: A system with 5 kg of R-410A has a charge of 5 × 2,088 = 10,440 kg CO₂e, or approximately 10.4 tonnes CO₂e.

The mandatory leak check frequencies under UK F-Gas are:

• 5 to 50 tonnes CO₂e: at least once every 12 months
• 50 to 500 tonnes CO₂e: at least every 6 months
• 500 tonnes CO₂e or more: at least every 3 months, and an automatic leak detection system is mandatory
• Automatic leak detection (where fitted) doubles the permitted interval — e.g. a system in the 5–50 tonne band can go 24 months between checks
• Hermetically sealed systems below 10 tonnes CO₂e: no scheduled leak check required — but the equipment must be labelled as hermetically sealed

Leak checks must be carried out by a certified engineer and must follow a systematic check of all joints, valves, connections, and service ports. A visual check alone is not sufficient — you must use a calibrated electronic leak detector or equivalent method.

After a Leak is Found

If you detect a leak, the clock starts immediately. The regulations require it to be repaired without undue delay, and a follow-up check by a certified engineer within one month of the repair to confirm it has worked. Failure to act promptly is a separate compliance breach.

Record Keeping: What You Must Log

Operators of F-Gas equipment (your commercial customers) are legally required to keep records for each piece of equipment that requires leak checks (5 tonnes CO₂e or more). As the installing or servicing engineer, you are often the one filling these in — and your records form part of the audit trail.

The equipment log must include:

• Quantity and type of refrigerant installed
• Quantity of refrigerant added during servicing (top-ups)
• Quantity of refrigerant recovered at decommissioning
• Dates and results of all leak checks
• Name and certification number of engineers who carried out the work
• Name and registration number of the contracting company

Records must be kept for a minimum of 5 years. They can be held in paper logbooks or digital systems — CertBox allows you to generate and store compliant F-Gas service records that include all required fields.

Refrigerant Handling on Site

A few practical compliance points that catch engineers out:

• Recovery before decommissioning is mandatory. Venting refrigerant to atmosphere is illegal regardless of quantity, refrigerant type, or urgency. You must have a suitable recovery machine on site.
• Cylinders must be labelled. Recovered refrigerant must go into a clearly labelled recovery cylinder. Mixing refrigerants (e.g., R-32 and R-410A) renders the contents unusable and incurs disposal costs.
• Cylinder tracking. If you transport refrigerant cylinders in a van, check whether you need to comply with ADR (transport of dangerous goods by road) requirements. Quantities below certain thresholds are exempt, but it's worth checking the current guidance from the HSE and DVSA.
• F-Gas and flammable refrigerants. R-32 and R-290 are flammable (A2L and A3 classification respectively). Handling these requires additional competency — check IOR and BESA guidance on safe handling, and ensure your leak detection equipment is rated for flammable refrigerants.

The Scotland, Wales, and NI Picture

F-Gas regulation in Great Britain (England, Scotland, and Wales) is a reserved matter and follows the same UK F-Gas Regulations. Northern Ireland sits under EU F-Gas IV rules due to the Windsor Framework — if you work across the border, you'll need to be familiar with both regimes.

Enforcement and Penalties

The Environment Agency (in England), SEPA (Scotland), and NRW (Wales) enforce F-Gas compliance. Enforcement activity has increased since 2020, with spot checks at commercial premises and intelligence-led investigations. Penalties include:

• Civil sanctions up to £200,000 per breach
• Criminal prosecution for serious or repeated offences
• Removal from the F-Gas Register (effectively ending your ability to work with refrigerants)
• Reputational damage — enforcement notices are published publicly

Staying on top of your certification, keeping accurate records, and charging only what you've recovered are the foundations of clean compliance.

Key Contacts and Resources

• REFCOM — F-Gas company registration and the F-Gas Register
• ACRIB — industry guidance and company certification
• GOV.UK F-Gas Guidance — official Environment Agency guidance
• Institute of Refrigeration (IOR) — technical guidance including flammable refrigerant handling

Published 2026-07-06. This article is for general guidance only and does not constitute legal or professional advice. Always refer to the relevant standards and consult qualified professionals for definitive requirements.