Common questions about boiler installation, repair, and servicing
We cover Wimbledon, Richmond, Clapham, Cobham, Epsom, Weybridge, Kingston, Dorking, and the surrounding Surrey and South London areas. If you are nearby and unsure, give us a call on 07947 336 802 and we will confirm whether your postcode is on our regular round.
David Oliver has been working on heating and plumbing systems across South London and Surrey for over twenty years, starting in the building trade at fourteen. Comfort Heating Wimbledon is the trading name he runs the business under today, and he attends every job personally.
Yes. We are Gas Safe registered, which is the UK legal requirement for any work on gas appliances. Each engineer carries a Gas Safe ID card you can ask to see at the door, and we keep our registration current on every category we work in.
Standard hours are Monday to Saturday, 08:00 to 18:00. We are closed on Sundays and we do not run a 24-hour service, but we do prioritise heating and hot-water emergencies during normal hours where the diary allows.
Yes. Boiler installations and any planned heating work are quoted free with no obligation. Call us on 07947 336 802 or send your details through the quote form and we will come back with a clear written price.
We accept bank transfer, debit and credit cards, and cash. Payment is taken on completion for repairs and small jobs. Larger installations are split into a deposit on booking, a stage payment when the job starts, and the balance on commissioning.
Boiler installations sit between £2,500 and £4,500 plus VAT. A straight combi-for-combi swap is usually £2,500 to £3,500 plus VAT. System upgrades, conventional swaps, and homes with poor existing pipework are quoted at the higher end. Every quote is fixed in writing before any work starts.
A like-for-like combi swap normally takes one full working day. A first-time combi conversion or a full system upgrade typically takes two to three days. We confirm the timeline in the written quote so you can plan around the work.
We install all the major UK brands including Worcester Bosch, Vaillant, Baxi, Ideal, and Glow-worm. The right choice depends on the warranty length you want, the size of the property, and your budget. We talk you through the trade-offs as part of the quote.
Yes. Removal of the old unit, the cylinder where relevant, and any redundant pipework is included as part of the installation price. Everything is taken away for safe disposal so you do not need to organise a separate collection.
All new boilers come with a manufacturer-backed warranty. Length depends on the model and brand, with most landing between five and twelve years on parts and labour. We register the warranty in your name on the day of commissioning.
We do not run a finance plan in-house. We keep our pricing competitive and our quotes fixed, and we are happy to stage payments across the install for larger projects. A few customers also use a 0 percent purchase credit card from their own bank for short-term spreading.
Repairs start from £100 plus VAT depending on the fault and the part involved. Common faults like a faulty diverter or a leaking pump usually sit at the lower end. We diagnose first, then quote in writing before fitting any new parts.
In most cases yes. We carry common spares for Worcester, Vaillant, Baxi, and Ideal in the van. If the fault needs a manufacturer-specific part, we order it the same day and book a return visit as soon as the part lands, which is normally within 24 to 48 hours.
There is a call-out fee that covers the engineer's time on site for the diagnosis. If you choose to go ahead with the repair, the call-out is rolled into the final repair price. If the repair is uneconomic and you decide not to proceed, only the call-out is charged.
We work on every major UK brand including Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Potterton, and Vokera. If your boiler is something rarer, give us a call before booking and we will let you know honestly whether we can support it or whether you are better off with a manufacturer engineer.
Yes. We provide annual Landlord Gas Safety Certificates (CP12) across Surrey and South London. The inspection covers every gas appliance in the property and the certificate is issued on the day of the visit.
Manufacturers require an annual service to keep the warranty valid. A yearly check also catches small faults before they become winter break-downs and keeps efficiency where it should be. Autumn is the busiest service window so we recommend booking by September.
Yes. We replace, service, and repair gas pool boilers and the plant around them, including pumps, filtration, and controls. It is a growing part of what we do across Surrey and South London, and all gas work is carried out by a Gas Safe registered engineer.
Often, yes. If a pool is slow to heat or expensive to run, we look at the boiler, the heat exchanger, and the controls and set out the options. Sometimes a like-for-like swap is right, sometimes a better-matched system saves more over a season. We quote both where it helps.
Every pool plant room is different, so we quote per project after a free site survey. You get the scope and the cost in writing before any work starts, with no obligation.
Kate H
David and his team are the best, I cannot recommend them highly enough! I now do all of my boiler servicing with David, he's professional, honest and takes the time to talk me through any work that needs to doing / has been done. He's also done work on my thermostat and heating system, I always feel comfortable having his team in the house - they are respectful, efficient and honest with their pricing. So glad I discovered them!
Laura Payne
We’ve been using David for around eight years and he’s helped us with all sorts of jobs during the renovation of our Victorian home. Most recently, he installed a new Megaflo hot water cylinder and, because of the age of the house and the existing pipework, recommended an eco-friendly, salt-free water conditioner instead of a traditional water softener. It turned out to be a much better solution for us.One of the reasons we keep going back to David is that he always takes the time to explain the options and recommend what he genuinely thinks is best, rather than the most expensive or complicated route. He’s reliable, easy to have around the house, and takes real pride in his work. Everything is always left clean and tidy, and the standard of workmanship is excellent.After eight years and countless jobs, we wouldn’t use anyone else and would happily recommend him.
Richard Payne
Following many years of using David for various projects around our home, we recently asked him to investigate some issues with the water heaters at our company office.The work included fault-finding, carrying out remedial work to a previous installation by another contractor and installing a new water heater in a separate room. As always, David arrived on time, was considerate of our working environment, worked efficiently, left everything spotless and stuck to his original estimate.A reliable, friendly and honest professional who consistently delivers excellent work. I wouldn’t hesitate to recommend him.
Gemma Hardy
Highly recommend. After having a total nightmare with another company - David was honest , explained everything , and seemed very trustworthy. Excellent service.
Va Ka
David has been my go-to person for anything heating/boiler related over the last 2 years. He's very knowledgeable, timely, available on demand and clean with his work. David revamped the old vented cylinder-based setup with a modern unvented cylinder last year that has made the house stress-free w.r.t leaks.Highly recommend David!
Rose
Tried and trusted gas engineer/plumber of choice for many years. David is reliable and professional and he’s done at least 3 boiler fittings and the servicing afterwards for my family. Highly recommend.
Andrew Horrigan
David and team installed a new megaflo system, water underfloor heating, radiators (and more) as part of a significant extension project. I've since used them for all servicing and ad-hoc jobs. Friendly, knowledgable, tidy and responsive. I highly recommend David and team!
Abigail Evans
David and his team installed a whole new heating system and boiler in our house, and we were so pleased with the result. The quality of work was excellent from start to finish. I fully trust David and his team in my home, and they were always friendly, polite, respectful, and very tidy. A brilliant experience all round. 🔧✨
Julie Peacock
Highly recommend this company. Dave was recommended to me as he does jobs for the company I work for. He is reliable polite and trustworthy. Dave has done my boiler service and other plumbing work for me. You would be in safe hands with Comfort Heating Wimbledon.
David Rasor
I can recommend David at Comfort Heating Wimbledon highly. He is always punctual and clearly explains what he will do and what the work entails. I have been using his services for many years.
Andy
David is always my first port of call for any plumbing and heating queries, installations and maintenance. He's worked on 5 residential properties for me over the last 10 years. I trust him implicitly and wouldn't hesitate to recommend him to anyone.
Cathryn O'Hare
David has regularly carried out all of our plumbing and heating work over the past 14 years and has also fitted new bathrooms for us. He always attends as quickly as he can, is very knowledgeable, trustworthy and helpful - we'd highly recommend him
Amanda Crowson
Used several times, including fitting brand-new boilers more than once on different properties. Very reliable, very knowledgeable and would thoroughly recommend.
Charlotte Duff
We've used David Oliver for all our plumbing needs over the years - he's very knowledgeable, reliable, and trustworthy. Highly recommended!
Sonia Higgs
David Oliver is our go-to plumber. He installed our new boiler and handles all the plumbing work around our home. He works cleanly and leaves everything tidy, and his communication is excellent—so we always know exactly what to expect, with no surprises. We wouldn’t use anyone else.
Paula Sim
Very happy with the work done. I had a new boiler installed and David did a quick and tidy job. The new boiler is so much better and more energy efficient. David took the time to explain all the updated features. Can’t recommend him enough!
Emma Wilson
David is smart, responsive and proactive. I have used him for a number of years for various plumbing and boiler issues. Wouldn't hesitate to recommend.
Melanie Sheen
I used Dave to replace my boiler. He was very responsive and did an excellent job. Would definitely recommend this company.
Sabah Ali
I have known David for many years now .He is brilliant & very knowledgeable. No job is too small or big & always makes time in an emergency .İ use David both for my GP surgery work place & home . I would highly recommend David to anyone 👍 farina