Check competence and certification
Stationary air-conditioning work involving F-gases is regulated. Ask who will carry out the refrigerant work and request the relevant personnel and company certification details where applicable. Current official guidance is available from the Environment Agency and GOV.UK.
Certification is essential, but it is not the only quality signal. The survey should still consider heat load, equipment positions, drainage, electrical work and access for future servicing.
Expect a clear written proposal
The quotation should identify the equipment, rooms, main routes and work included. It should distinguish assumptions, exclusions, optional work and payment terms. Applicable manufacturer and workmanship warranty details should be available before commitment.
Be cautious with a price that cannot be connected to a survey or a clear design. Photographs can help with an early conversation, but they rarely show every load, access and routing issue.
Ask about the finished experience
Discuss protection of the working area, making good, waste removal, commissioning and control demonstration. A professional installation should be tested and explained, with the property left tidy.
Aftercare matters too. Ask how servicing, faults and warranty questions are handled. Top Local is led by Alexander Hatzidakis, an F-Gas-certified installer who works directly with his team across Kent and the South East.