F-Gas regulations affect every HVAC engineer in the UK who installs, maintains, or decommissions equipment containing fluorinated greenhouse gases. That's air conditioning, heat pumps, refrigeration, and chillers.
The rules are tightening. The HFC phase-down is cutting quota allocations year-on-year, pushing the industry toward lower-GWP refrigerants. Record-keeping requirements are stricter. And the penalties for non-compliance are serious — up to £200 per day for leak checking failures alone.
This guide covers everything UK HVAC engineers need to know about F-Gas compliance in 2026.
What are F-Gas regulations?
The UK F-Gas Regulation (retained EU Regulation 517/2014, as amended) controls the use of fluorinated greenhouse gases — primarily hydrofluorocarbons (HFCs) used as refrigerants in air conditioning, heat pumps, and refrigeration.
The regulation has three main goals:
- Phase down HFC use — reduce the amount of HFCs placed on the UK market to 15% of 2015 levels by 2036
- Minimise leaks — mandatory leak checks, record-keeping, and proper recovery
- Restrict high-GWP refrigerants — ban certain refrigerants in new equipment
Who does it apply to?
Every business that:
- Installs, services, maintains, or decommissions equipment containing F-gases
- Recovers F-gases from equipment
- Sells F-gas refrigerants
- Operates equipment containing 5+ tonnes CO2 equivalent of F-gases
If you're an HVAC engineer in the UK, it applies to you.
The HFC phase-down schedule
The UK has its own HFC phase-down quota system, separate from the EU since Brexit. The trajectory:
| Year | Quota (% of 2015 baseline) |
|---|---|
| 2015 | 100% |
| 2018 | 63% |
| 2021 | 45% |
| 2024 | 31% |
| 2027 | 24% |
| 2030 | 20% |
| 2036 | 15% |
What this means in practice: R-410A (GWP 2088) and R-134a (GWP 1430) are becoming increasingly expensive and harder to source. The industry is shifting to R-32 (GWP 675), R-290 (propane, GWP 3), and R-744 (CO2, GWP 1).
For HVAC businesses, this means:
- Stock costs for traditional refrigerants are rising year-on-year
- You need to be trained and certified to handle new refrigerants
- Equipment manufacturers are switching to low-GWP options — your skills need to keep up
- Customers will increasingly ask about "green" refrigerant options
Leak checking requirements
Operators of equipment containing F-gases must carry out regular leak checks. The frequency depends on the CO2 equivalent charge:
| CO2 equivalent charge | Leak check frequency |
|---|---|
| 5 – 50 tonnes CO2e | Every 12 months |
| 50 – 500 tonnes CO2e | Every 6 months |
| 500+ tonnes CO2e | Every 3 months |
If a leak detection system is fitted, the intervals double (every 24 months for 5-50 tCO2e, etc).
How to calculate CO2 equivalent
CO2 equivalent = refrigerant charge (kg) × GWP
Examples:
- 3kg of R-410A: 3 × 2088 = 6,264 kg CO2e = 6.3 tonnes → leak check every 12 months
- 5kg of R-32: 5 × 675 = 3,375 kg CO2e = 3.4 tonnes → below threshold, no mandatory leak checks
- 8kg of R-410A: 8 × 2088 = 16,704 kg CO2e = 16.7 tonnes → leak check every 12 months
This is why the switch to low-GWP refrigerants matters for maintenance too — R-32 systems often fall below the leak check threshold entirely.
Record-keeping requirements
Operators must keep records for each piece of equipment containing 5+ tonnes CO2e of F-gas. Records must include:
- Quantity and type of refrigerant in the equipment
- Quantity of refrigerant added during installation, maintenance, or servicing
- Quantity of refrigerant recovered during servicing, maintenance, or final disposal
- Identity of the company or technician who carried out the work
- Dates and results of leak checks
- If the equipment has been decommissioned, what happened to the refrigerant
Records must be kept for at least 5 years and made available to the enforcing authority (Environment Agency in England, equivalent bodies elsewhere in the UK) on request.
What this means for HVAC businesses
Every time you service, install, or decommission F-gas equipment, you need to record:
- The job details
- Refrigerant type and quantity
- What you did (added/recovered/replaced)
- Your technician's F-gas certificate number
Paper logbooks work but they get lost, damaged, or left in the van. Digital records in your job management system — tagged to the job, the engineer, and the equipment — are more reliable and instantly searchable when the Environment Agency comes asking.
Certification requirements
Company certification
Any company that installs, maintains, services, repairs, or decommissions F-gas equipment must hold an F-Gas company certificate from a certification body:
- Refcom — the most common in the UK
- ACRIB (Quidos) — another recognised body
- Bureau Veritas
Company certificates are assessed against criteria including staff qualifications, equipment, and procedures.
Individual certification
Every technician who carries out work on F-gas equipment must hold a personal F-gas handling certificate. Categories:
| Category | Covers |
|---|---|
| Category I | All F-gas activities (leak checking, recovery, installation, maintenance) |
| Category II | Leak checking (systems <3kg or hermetically sealed <6kg), recovery |
| Category III | Recovery of F-gases from systems <3kg |
| Category IV | Leak checking only |
Most HVAC engineers need Category I — it covers everything.
Tracking certifications
F-Gas company certificates and individual technician certificates both have expiry dates. Missing a renewal means you're non-compliant — and if the Environment Agency audits you during a lapse, the consequences are serious.
Your software should track:
- Company F-Gas certificate expiry
- Every technician's individual certificate expiry
- Automatic alerts 90, 60, and 30 days before expiry
- Proof of certification attached to engineer profiles
Banned substances and equipment
The UK F-Gas regulation bans certain high-GWP refrigerants in new equipment:
| Equipment type | Ban on refrigerant with GWP above |
|---|---|
| Domestic fridges and freezers | 150 |
| Commercial refrigeration (hermetically sealed) | 150 |
| Commercial refrigeration (centralised multipack, ≥40kW) | 150 |
| Movable room AC | 150 |
| Single split AC containing <3kg F-gas | 750 |
| New stationary refrigeration (any size) | Varies — consult current DEFRA guidance |
Key takeaway: R-410A (GWP 2088) is being phased out of new split systems. R-32 (GWP 675) is the current mainstream replacement for residential and light commercial AC. R-290 propane systems are growing in the market.
Enforcement and penalties
The Environment Agency (England), Natural Resources Wales, SEPA (Scotland), and NIEA (Northern Ireland) enforce F-Gas regulations.
Penalties include:
- Civil penalties — up to £200/day for leak checking failures
- Criminal prosecution — for deliberate venting, operating without certification, or serious record-keeping failures
- Unlimited fines — on conviction for the most serious offences
The Environment Agency has increased enforcement activity in recent years. They do audit HVAC companies — checking records, certifications, and procedures. Being audit-ready isn't optional.
Practical steps for HVAC businesses
1. Audit your current compliance
Go through every piece of equipment you've installed or maintain in the last 2 years:
- Is the refrigerant type and charge recorded?
- Are leak check schedules being met?
- Are recovery records complete?
- Are all technician certificates current?
2. Track certifications digitally
Stop relying on memory or a spreadsheet for certificate expiry dates. Use software that:
- Stores every technician's F-Gas certificate with expiry
- Sends automatic alerts before expiry
- Logs which certified engineer worked on each job
- Keeps a searchable audit trail
3. Build F-Gas record-keeping into your job workflow
Every service, installation, or decommission job should automatically capture:
- Equipment ID and location
- Refrigerant type and GWP
- Quantity added, recovered, or replaced
- Technician certificate number
- Date and result of any leak check
If your job management system handles this natively, compliance becomes a byproduct of doing the job rather than an extra admin task.
4. Stay current on refrigerant training
Low-GWP refrigerants like R-290 (propane) are flammable. R-744 (CO2) operates at much higher pressures. Your engineers need training specific to these refrigerants — their F-Gas certificate alone isn't enough.
5. Plan for the phase-down
R-410A costs will keep rising. Start specifying R-32 or lower-GWP alternatives for new installations now. Talk to your suppliers about refrigerant availability and pricing trends.
How Muster helps with F-Gas compliance
Muster tracks your team's F-Gas certifications (company and individual), sends automatic expiry alerts, and links compliance records to every job. When you complete an HVAC service job, the refrigerant data, engineer certification, and leak check results are all captured in the job record — ready for any Environment Agency audit.
Combined with RAMS generation, GPS fleet tracking, and AI call handling that catches every maintenance callback, it's one platform for the entire HVAC workflow.
Book a demo and see how it handles your F-Gas compliance.