Choosing an Air Conditioning Installer in Cheam

F-Gas registration is non-negotiable

Any company installing, servicing or repairing air conditioning systems containing refrigerant must be F-Gas registered, or must employ engineers who hold the relevant F-Gas qualification. This isn't a nice-to-have, it's a legal requirement, and it exists because refrigerant handling needs proper training to avoid environmental harm and to ensure the system is charged correctly.

Ask to see evidence of F-Gas certification before booking work, and be wary of anyone unwilling or unable to provide it. A legitimate installer will have no issue confirming this.

Get a written quotation, not a verbal estimate

A proper quotation sets out exactly what's included, the equipment being fitted, the scope of installation work, and the total cost, rather than a rough verbal figure that can shift once work is underway. Written quotes protect both parties and make it much easier to compare like-for-like when getting more than one quote.

Be cautious of quotes that seem vague about what equipment is actually being supplied, brand and model matter, and a specific quote should name them rather than referring generally to 'a unit'.

Suitable equipment selection, not a one-size-fits-all answer

A good installer asks about your room, how it's used, how many people occupy it, glazing, insulation and any particular noise or aesthetic preferences before recommending equipment. If someone quotes a system without visiting the property or asking any of these questions, it's worth being cautious, since sizing and equipment choice should be based on your specific circumstances rather than a generic assumption.

A clear scope of work

Before work begins, you should know exactly where the indoor and outdoor units will go, how pipework will be routed, whether any drilling or making good is included, and what happens with electrical connections. Ambiguity here is where disputes and unexpected costs tend to arise later, so it's worth asking for this in writing if it isn't already covered by the quotation.

Proper commissioning, not just fitting

Installing an air conditioning system isn't finished once the units are physically mounted. Proper commissioning includes pressure testing the pipework, evacuating air and moisture from the system, charging with the correct amount of refrigerant, and testing full operation before handover. Skipping or rushing this stage is one of the most common causes of early faults, so ask what commissioning process is included.

Insurance and aftercare

Check that the installer carries appropriate liability insurance, and ask what aftercare or warranty support is included, both on the installation workmanship and the manufacturer's equipment warranty. Understanding who to call if something goes wrong in the weeks and months after installation gives you confidence the relationship doesn't end the moment the invoice is paid.

Genuine reviews and professional communication

Look for reviews that describe specific jobs and experiences rather than generic praise, and where possible ask for examples of similar work. How a company communicates before you've even signed anything, whether they answer questions clearly, turn up when they say they will, and provide information without pressure, tends to be a reasonable indicator of how they'll behave once the job is underway.