If you are looking for a certified F-Gas engineer in London, you are in the right place. Simply Air Conditioning London is a Certified F-Gas Company: every system we install, service or repair is handled by a qualified, F-Gas compliant air conditioning engineer. Our certificate is published further down this page so you can check it before you book.

We have been working across London since 2009, from our base in Sidcup, now covering London boroughs predominantly in the south and east. Free survey, call on 020 7870 2333.

Why F-Gas Certification Matters When You Hire An Engineer

In the UK it is a legal requirement: anyone who installs, services, repairs or decommissions equipment containing fluorinated greenhouse gases must hold a valid F-Gas qualification, and the company employing them must hold company certification. It is not a badge of quality that a contractor can award themselves — it is a registered credential.

That matters to you for three practical reasons:

• Your warranty. Most manufacturers — Daikin, Mitsubishi Electric, Fujitsu, Panasonic — require installation by a certified engineer for the warranty to stand.
• Your legal position. If you own the equipment, the record-keeping and leak-checking obligations are yours, not the installer’s. An uncertified engineer cannot produce records that satisfy them.
• Your refrigerant. Handling, recovering and disposing of refrigerant is the part of the job where an uncertified installer causes real damage — to the system and to the environment.

How To Check An Engineer Is Genuinely F-Gas Registered

Ask for the company certification number and check it against the official register. You can look up F-Gas registered companies and read the official FAQs here. Any legitimate contractor will hand you the number without hesitation — ours is on the certificate below, which you can download.

What Our F-Gas Certified Engineers Do

• Air conditioning installation — split systems and multi-split systems for homes, flats, offices, shops, schools, server rooms and medical practices, across West, North and South West London.
• Servicing and annual maintenance — including the leak checks and documentation the regulations require of equipment owners.
• Repairs and emergency call out — diagnosis and repair on all the major brands we install.
• Refrigerant recharge (regas) — this is the work that legally requires F-Gas certification. If a company offers to regas your unit without it, walk away.
• Installation in Victorian and period properties, where routing and conservation constraints need planning before anyone drills anything.

We install and maintain Daikin, Mitsubishi Electric, Fujitsu, Panasonic, Gree and Sanyo systems.

What Are F-Gas Regulations?

They are restrictions on air conditioning and refrigeration equipment that uses f-gases — fluorinated greenhouse gases. They place limits on the use of higher GWP (global warming potential) gases such as R404A and R507A in existing equipment, and they impose leakage control duties on whoever owns the equipment.

The F-Gas Compliance Has The Objective Of:

• Reducing F-Gas emissions.
• Better containment and recovery of F-Gases.
• Performing regular checks on all units containing F-Gas, and documenting the findings if there are leaks or problems.

Owners Of Air Conditioning Equipment That Uses HFCs Should, According To The Legislation:

• Contract qualified air conditioning engineers, certified to service, repair and maintain air conditioners.
• Prevent air conditioner leaks, and report them as soon as they are detected.
• Conduct regular checks — quarterly, bi-annually or annually depending on the system, or as recommended for the equipment in question.
• Keep all records, detailing: check date, leak check, complete results report, and the air conditioning contractor who carried out the maintenance or service.

If you are not sure whether your system falls under these duties, ask us — establishing it takes one look at the equipment, and it is part of the free survey.

Our Certifications In Air Conditioning Services

F-Gas Questions We Get Asked

What is an F-Gas certificate?

It is the formal proof that an engineer is qualified to handle fluorinated greenhouse gases, and that the company employing them holds company certification to do that work. There are two separate things: the individual engineer’s qualification and the company’s certification. A compliant contractor holds both.

Do I need an F-Gas engineer just to service my air conditioning?

If the work involves the refrigerant circuit in any way — leak checking, recovery, recharging — then yes. A clean of the filters is not regulated work; anything that touches the refrigerant is.

What is an F-Gas number and where do I find it?

It is the registration number of the certified company, and you can check it on the official F-Gas register. Ask any contractor for theirs before work starts — ours appears on the certificate above.

Do you cover my part of London?

Yes — we cover every London borough from our base in Sidcup. Call and we will tell you the same day whether we can get to you.

Talk To A Certified F-Gas Engineer

Call us on 020 7870 2333, or get in touch using the contact form and we will arrange a free survey.

F-Gas certification is a legal requirement for anyone handling refrigerants in the UK — it is the first thing to verify when choosing an installer. See what a certified installation costs in London in 2026.