F-Gas Record Keeping Guide for UK Businesses
A missing service sheet can become a serious compliance problem when an inspector asks for evidence of refrigerant handling. This F-Gas record keeping guide sets out the records commercial operators need to control, why they matter, and how to make them a dependable part of planned maintenance rather than a last-minute administrative exercise.
For facilities teams, the objective is straightforward: demonstrate that each applicable air conditioning, refrigeration or heat pump system has been maintained by appropriately certified personnel, refrigerant has been handled correctly, and any leak has been addressed. Good records also give you a much clearer picture of asset condition, recurring faults and future cost exposure.
What F-Gas records are designed to prove
F-Gas record keeping is not paperwork for its own sake. It creates an auditable history for equipment containing fluorinated greenhouse gases. The records show what refrigerant is in the system, how much has been added or recovered, whether leak checks were completed when due, and who carried out the work.
In Great Britain, the operator of relevant equipment must keep records and make them available to the enforcing authority on request. In practice, the operator is usually the business or person with actual control over the technical running of the equipment – not automatically the building owner or managing agent. On a leased site, this needs to be agreed clearly. If responsibility is unclear, vital checks and documentation can be missed.
Records are generally required for equipment subject to F-Gas leak-checking obligations and should be retained for at least five years. Requirements can differ in Northern Ireland, where EU F-Gas rules apply, so multi-site operators should confirm the regime applicable to each location rather than assuming one process covers every property.
Which equipment needs a record
The requirement depends on the refrigerant charge expressed as tonnes of CO2 equivalent, rather than simply the physical weight of gas in kilograms. This catches many commercial split systems, VRF and VRV installations, close-control units, cold rooms, heat pumps and refrigeration plant.
As a guide, leak-checking obligations commonly begin at 5 tonnes CO2 equivalent. The threshold is higher for hermetically sealed equipment, provided it is correctly labelled, while systems with permanent leakage detection have different inspection intervals. Larger systems require more frequent checks. The precise interval depends on the CO2 equivalent charge and whether an approved leakage detection system is fitted and functioning.
Do not rely on a rough estimate from the outdoor unit size. The equipment label, commissioning information and refrigerant type are needed to establish the charge and CO2 equivalent. Where documentation is incomplete, an F-Gas certified engineer can assess the installation, identify the likely record-keeping requirement and create a compliant asset register.
The information your F-Gas records must contain
Each relevant asset needs a clear, traceable record. A service report can form part of that record, but it is only sufficient if it contains the required information and is tied to the specific system.
Your file should identify the equipment and its location, then record the quantity and type of refrigerant installed. It should show all refrigerant added during installation, servicing or repair, along with quantities recovered from the system. This matters because unexplained gas usage can indicate a leak, poor repair history or weak stock control.
The record must also include the dates and results of leak checks, including any follow-up check required after a leak repair. If a leak is found, the record should describe the repair carried out. A note saying “system checked” is not enough if it does not demonstrate what was inspected and what the engineer found.
You should retain details of any installed leakage detection system, including checks of its operation where applicable. Finally, record the name of the engineer and the F-Gas certificate details of both the individual and business carrying out the work. These details show that refrigerant was handled by appropriately certified personnel.
For practical control, each entry should also state the asset reference, site address, make, model and serial number. These may not all be the core statutory data points, but they prevent a common and costly failure: service evidence being filed against the wrong unit on a site with multiple identical systems.
Build an F-Gas record-keeping process that works
The strongest approach is to maintain one live asset register and attach every relevant service event to it. This is more effective than storing certificates in individual inboxes, paper folders or separate contractor portals that a new facilities manager cannot access.
Start by surveying every site and assigning each applicable system a unique reference. Confirm the refrigerant type, charge, CO2 equivalent, leak-check frequency and next inspection date. This gives your team a single compliance calendar and allows maintenance to be planned before deadlines become urgent.
Then make record capture part of the engineer visit. The engineer should update the refrigerant movement, leak-check result, repair details and certification information immediately after the work. A manager or nominated compliance lead should review completed documentation, particularly where refrigerant has been added or a fault has been identified.
Digital records are usually the most reliable option for multi-site estates. They make it easier to search asset histories, set reminders and retrieve evidence during an audit. Paper records can still be acceptable if complete, legible and secure, but they are harder to maintain across staff changes and emergency call-outs.
The format matters less than control. A spreadsheet may be sufficient for a small office with a handful of units; a retail group, hospitality operator or data centre will normally need a structured maintenance platform or contractor-managed register. The right system is the one that gives the operator immediate access to accurate, site-specific information.
Keep compliance records separate from quotations
A quotation, job sheet or invoice is useful supporting evidence, but it should not be treated as the only F-Gas record. Commercial documents often omit the refrigerant charge, the outcome of a leak check or certification details. They can also describe several assets in broad terms, making it difficult to prove work on a particular system.
Ask your service provider to issue a detailed F-Gas service record after every applicable visit and ensure it is filed against the relevant asset. If a contractor holds the master copy, agree how and when your business receives records. The legal responsibility remains with the operator, even when maintenance is outsourced.
Common record-keeping failures and their operational cost
The most common weakness is an incomplete asset list. Systems are replaced, extended or moved, but the compliance register is not updated. The result is a unit that is never scheduled for a required leak check until a breakdown, audit or landlord query exposes the gap.
Another problem is treating a repair as the end of the process. Where a leak has been repaired, a follow-up verification check may be required to confirm the repair was effective. Without a documented return visit, the record can look incomplete and the system may continue losing refrigerant, reducing capacity and increasing energy use.
Poor refrigerant records can also obscure repeated faults. If the same unit receives small gas top-ups each summer, it is not simply a servicing issue. It may point to an unresolved leak, an ageing component or a system approaching a replacement decision. Accurate history allows planned capital decisions instead of expensive reactive work during peak occupancy.
There is a warranty consideration as well. Manufacturers and suppliers may require evidence of competent installation and ongoing maintenance when a claim is made. Clear F-Gas documentation supports that evidence and helps protect the value of the asset.
F-Gas record keeping guide: responsibilities for landlords and tenants
For occupied commercial buildings, responsibility should be decided in writing before the first maintenance visit. A landlord may retain control of central plant serving multiple tenants, while a tenant controls split systems within its own demise. A managing agent may coordinate contractors without being the legal operator.
The question to answer is: who decides how the equipment is operated and maintained, and who has the practical authority to authorise repairs? That party needs access to the records and should ensure inspections happen on time. Service agreements should state who receives reports, who maintains the register and how compliance issues are escalated.
This is especially important when a property changes hands, a lease ends or a maintenance contractor changes. Request the full asset register, F-Gas service history, commissioning documents and outstanding repair information as part of the handover. Starting a new contract with incomplete records creates avoidable risk.
Make documentation part of asset protection
F-Gas compliance works best when it sits alongside planned preventive maintenance, not as a separate annual chase for certificates. Leak checks can be scheduled with filter cleaning, coil inspections, electrical testing and performance reviews, reducing disruption to tenants and staff while giving decision-makers a fuller picture of plant condition.
A competent service partner should flag missing labels, uncertain refrigerant charges, overdue checks and repeat leakage trends rather than merely completing a visit. That is where documentation starts delivering business value: fewer surprises, clearer budgets and stronger evidence that your systems are being managed responsibly.
If your current records are spread across emails, old service folders and former contractors, a site-by-site review is a sensible first step. Bringing the register under control now gives your business a firmer basis for compliance, maintenance planning and reliable climate control when the building needs it most.
