What F-Gas certification means when you buy air conditioning

Most people booking air conditioning assume it is an electrical job. It is not. The moment an engineer opens the refrigerant circuit, it becomes refrigeration work, and that is regulated.

The rule, briefly

Under the GB F-Gas Regulation, anyone who installs, services, repairs, leak checks or decommissions equipment containing fluorinated greenhouse gases must hold an F-Gas certificate. The company employing them needs one too. Both halves matter: a certified engineer working for an uncertified firm does not satisfy the regulation.

Category I is the full-scope qualification. It covers leak checking, recovery, installation, maintenance and repair at any charge size, which is what domestic and small commercial split systems need.

Why it is worth checking

Three things tend to go wrong when it is skipped.

The warranty. Manufacturers make a valid commissioning record a condition of the guarantee. Daikin, Mitsubishi Electric and the rest all ask who fitted it. An uncertified install can leave you with a system that works and a warranty that does not.

The paperwork. You, as the equipment operator, have to be able to produce the record: refrigerant type and charge, leak checks, any top-ups. Not the installer. If you sell the building or a landlord inspection lands, that record is what gets asked for.

The gas itself. Venting refrigerant is illegal. At decommissioning it has to be recovered into proper cylinders, and the liability for that sits with whoever owns the building.

What to ask before you book

Four questions, and any certified firm will answer them without hesitating:

1. What is your F-Gas company certificate number?
2. Which refrigerant will the system use, and what is its GWP?
3. What is the charge in tonnes of CO2 equivalent, and how often does it therefore need leak checking?
4. Who holds the equipment record after commissioning?

That third one catches people out. Leak-check frequency is not a fixed interval, it scales with the charge. Systems at or above 5 tonnes CO2 equivalent need checking at least every twelve months, and more often as the charge rises.

On refrigerants

Most new domestic systems now run R32, which carries roughly a third of the global warming potential of the R410A it replaced. It is mildly flammable, which changes the pipework and siting rules rather than making it dangerous. That is another reason the certification exists.

If you are weighing air conditioning for a room in Devon and want a straight answer about whether it is the right call, talk to us. We are F-Gas certified and Gas Safe registered, and we will tell you when a radiator would serve you better.