Kelvara exists because of a pattern anyone who has hired a trade in London will recognise. Three quotes come back hundreds of pounds apart. None of them explains what is actually included. One installer never visited the property. And the eventual invoice bears only a passing resemblance to the number that was agreed.
We built the business around removing that experience. We survey before we price. We give one fixed written figure covering everything, including making good. And we tell customers when they do not need what they have asked for — which costs us work in the short term and earns the recommendation that follows.
Qualifications and registrations
City & Guilds 2079-11 F-Gas qualified. Our engineers hold the City & Guilds 2079-11 F-Gas qualification, covering the installation, servicing and decommissioning of the systems we work on, including the safe recovery of refrigerant.
What we work on. Split system air conditioning and air-to-air heat pumps. That is the scope we quote for and the scope we work within — we do not install air-to-water heat pumps that replace a boiler, or ground source systems.
City & Guilds 6187-316 qualified. Our engineers hold the City & Guilds 6187-316 qualification in the safe handling of hydrocarbon (flammable) refrigerants, such as R290, in refrigeration and air conditioning systems.
Registered at Companies House. Kelvara Group Ltd is registered in England and Wales, company number 17340394. Our filing history and registered details are public and can be checked directly on the Companies House register. We would encourage you to do that for any contractor you are about to give money to.
Fully insured. We carry public liability insurance covering every job we undertake. Certificates are available on request and are part of the standard pack we provide to managing agents, freeholders and landlords.
MCS: not yet certified. We are not currently MCS certified, which means we cannot claim Boiler Upgrade Scheme grants on a customer's behalf. Those grants only cover air-to-water systems anyway, which we don't install — our heat pump pages explain the difference.
How we work
We survey before we quote. A price given over the phone without seeing the property is a guess, and guesses get revised upward once the engineer arrives and finds the condenser has to go on the roof.
One fixed written price. Equipment, labour, materials, electrical work, commissioning and making good, in a single figure agreed before we start. No day rates, no provisional sums that quietly become real ones.
We size systems honestly. Heat load depends on glazing, orientation, insulation and how a room is used — never on floor area alone. An undersized unit is cheaper to sell and will never keep the room comfortable.
We say no. Sometimes a fifteen-year-old system is better replaced than repaired. Sometimes insulation would do more good than a heat pump. Sometimes the job sits outside what we do well, and the right answer is a recommendation to someone else.
Where we work
We are based in Wallington, Surrey, and work across South London, Surrey and Kent. Being genuinely local matters more in this trade than people assume. The housing stock here is unusually varied, and a 1930s semi in Sutton, a Victorian terrace in Croydon and a mansion block flat in Wandsworth present completely different problems for pipe routing, condenser siting and freeholder consent. Engineers who work these streets every week already know those problems and price them accurately.
South London: Sutton, Carshalton, Cheam, Worcester Park, Beddington, Croydon, Merton, Kingston upon Thames, Richmond upon Thames, Wandsworth, Lambeth, Southwark, Lewisham, Bromley, Greenwich, Hammersmith & Fulham, Kensington & Chelsea, Westminster, Hounslow.
Surrey: Wallington, Epsom, Ewell, Banstead, Leatherhead, Esher, Cobham, Weybridge, Reigate, Redhill, Dorking, Caterham, Woking, Guildford.
Kent: Orpington, West Malling, Ashford, Sevenoaks, Dartford, Gravesend.
If you are near the edge of that, ring and ask. We would rather tell you we cannot service a job properly than take it and let you down.