Combi boiler
Heats water on demand, straight from the mains. No hot water cylinder, no tanks in the loft.
Best for: Flats and most 1 to 3 bedroom homes with one bathroom, or two with a larger model.
Read more →Gas Safe registered · Croydon & South London
Boiler installation in Croydon
New combi, system and regular boilers fitted by Gas Safe engineers who work in Croydon every day. Tell us about your home in two minutes and get a fixed price, usually without anyone needing to visit first.
Gas Safe registeredNo. 567789Free quote · 1 of 7 Saved
Prefer to talk? Call 020 3856 8293
- Gas Safe No. 567789Check us on the register
- Fixed written quoteThe price you agree is the price
- Building Regs notifiedCertificate posted to you
- Warranty registeredWith the manufacturer, for you
New boilers, done properly
A new boiler is a big decision. We keep it simple.
Most people only buy a boiler two or three times in their life, usually when the old one has just given up. That is a bad moment to be comparing brands, kilowatts and flue kits. So our quote form asks the questions an engineer would ask on a survey, and a Gas Safe engineer looks at your answers and comes back to you with a price and a recommendation.
We fit gas boilers for homes all over the borough: flats near East Croydon, Victorian terraces in Thornton Heath and South Norwood, 1930s semis in Purley, Coulsdon and Shirley, and larger family homes in Sanderstead and Selsdon. Every installation is carried out by On Track Plumbing & Heating Ltd, Gas Safe registered under number 567789.
Not sure what you need? That's normal. Pick “Not sure” wherever it comes up and we'll work it out from the photos, or read our guides to combi boilers, converting to a combi and what a new boiler costs.
Which boiler?
Combi, system, regular or back boiler?
The four kinds of gas boiler you’ll find in Croydon homes. The pictures show how each one is piped, which is why the swap from one to another takes longer.
System boiler
Heats a hot water cylinder, usually in an airing cupboard. Mains-fed, so no loft tanks.
Best for: Bigger homes with two or more bathrooms in use at the same time.
Read more →Regular boiler
Also called heat-only or conventional. A cylinder plus cold water tanks in the loft.
Best for: Older homes with low mains pressure, or where the pipework is built around it.
Read more →Back boiler
Sits behind a gas fire in the chimney breast. No longer made, and parts are hard to find.
Best for: Nobody, now. Replacing one is a common job in Croydon’s 1930s semis.
Read more →How it works
From quote to warm house
No pushy home visit, no hard sell.
- 1
Tell us about your boiler
Two minutes in the quote form: what you have, where it is, how big your home is. Add a photo of the boiler and the flue if you can.
- 2
Get a fixed price
A Gas Safe engineer reviews it and calls you with a written quote and a recommendation. If anything needs checking, we pop round first.
- 3
Installation day
We protect the floors, take the old boiler out, fit and commission the new one, clean the system and show you the controls.
- 4
Paperwork sorted
We register the warranty with the manufacturer and notify Building Control through the Gas Safe Register. Your certificate arrives by post.
What’s included
What a proper boiler installation includes
A cheap quote often leaves some of these out. Ours lists them, so you can compare like with like.
Old boiler removed
Disconnected safely, taken away and disposed of properly, along with any old tanks or cylinder we take out.
System cleaned
Old radiators are full of sludge that kills new boilers. The system is flushed and dosed with inhibitor, as the regulations and every manufacturer require.
Magnetic filter
Fitted under the boiler to catch the sludge and rust that circulate in older systems, before it reaches the heat exchanger.
Controls that meet Boiler Plus
Every new gas boiler in England needs time and temperature controls, and a combi needs an extra energy-saving measure such as a smart thermostat with optimisation.
New flue, fitted to the rules
Flue position is tightly regulated near windows, doors, boundaries and under eaves. We check it, and fit a new flue kit with the boiler.
Frost-proof condensate pipe
Condensing boilers drain water through a small pipe. Run outside, it can freeze and shut the boiler down in a cold snap, so we route and size it to avoid that.
Benchmark checklist
The commissioning record for your boiler, filled in and signed. Manufacturers ask for it before honouring a warranty claim.
Building Regulations certificate
Fitting a boiler is notifiable work. We notify Building Control through the Gas Safe Register, and you get a compliance certificate in the post.
Warranty registered
Most manufacturers need registering within 30 days of fitting or the warranty is shorter. We do it for you, in your name.
Sizing guide
What size boiler do I need?
A rough guide for Croydon homes. Bigger isn't better: an oversized boiler cycles on and off and wastes gas. We confirm the size by checking your water pressure and flow rate on the day of the survey.
| Home | Bathrooms | Usually suits | Output |
|---|---|---|---|
| Flat or 1 to 2 bed house | 1 bathroom | Combi | Around 24 to 28kW |
| 3 bed house | 1 bathroom | Combi | Around 28 to 32kW |
| 3 to 4 bed house | 1 bathroom + en-suite | Larger combi | Around 32 to 38kW, if mains flow allows |
| 4 bed or more | 2+ bathrooms used at once | System boiler + cylinder | Sized to the home’s heat loss |
Repair or replace?
Signs it’s time for a new boiler
A good engineer will tell you when a repair is the better option. These are the signs that it usually isn’t.
It’s over 12 to 15 years old
Parts get harder to find and each repair buys less time. Older boilers are also far less efficient than a modern condensing boiler.
It keeps breaking down
If you’ve had two or three call-outs in a year, the money is usually better spent on a replacement with a fresh warranty.
Your gas bills keep rising
A boiler that has lost efficiency burns more gas for the same heat. Controls like a smart thermostat help too.
Yellow flame or soot marks
A healthy flame is blue. A lazy yellow flame or black marks round the case can mean carbon monoxide. Turn it off and get it checked.
You still have a back boiler
They’re no longer made and are the most common “can’t get the part” repair we see. Converting frees up the chimney breast too.
Your home has changed
A new en-suite or loft conversion can outgrow an old combi. We size the replacement for how you live now.
Areas we cover
Boiler engineers across Croydon
We’re based in South London and work right across the borough and the roads just over its borders.
- Croydon town centreCR0
- AddiscombeCR0
- ShirleyCR0
- WaddonCR0
- New AddingtonCR0
- South CroydonCR2
- SandersteadCR2
- SelsdonCR2
- CoulsdonCR5
- Old CoulsdonCR5
- PurleyCR8
- KenleyCR8
- Thornton HeathCR7
- NorburySW16
- South NorwoodSE25
- Upper NorwoodSE19
- SelhurstSE25
- Broad GreenCR0
- MitchamCR4
- WhyteleafeCR3
- WallingtonSM6
- BeckenhamBR3
Postcodes: CR0, CR2, CR3, CR4, CR5, CR7, CR8, SE19, SE25, SW16, SM6, BR3. Not sure if you’re covered? See the full list or just put your postcode in the quote form.
FAQ
Boiler installation questions
How long does a boiler installation take?
Swapping a combi for a new combi in the same place is usually a one-day job. Moving the boiler, or converting a system or regular boiler to a combi, usually takes two days and occasionally three if there are tanks to remove from the loft.
Do I need to be at home?
Someone needs to let us in at the start, and we like to show you how to use the new boiler and controls at the end. You don’t need to be there all day.
Will I be without heating and hot water?
Only on the day of the work. The water and gas are turned off while the old boiler comes out and the new one goes in, then everything is back on before we leave.
Can I still have a new gas boiler?
Yes. There is no ban on replacing a gas boiler in an existing home. The rules that restrict fossil fuel heating apply to newly built homes, not to replacing the boiler you already have.
What paperwork will I get?
A completed Benchmark checklist for the boiler, the manufacturer’s warranty registered in your name, and a Building Regulations Compliance Certificate, which the Gas Safe Register sends to you after we notify them of the installation. Keep them together: you’ll need them if you sell the house.
Do you install boilers in flats?
Yes, including flats above the first floor. Flats often have the boiler in a kitchen cupboard with a flue through the outside wall. If your building has a managing agent or freeholder, check whether they need to approve a new flue position.
Can you install a boiler my landlord has asked me to arrange?
We can, but we’ll need the landlord or letting agent to confirm the go-ahead, because the boiler belongs to them. Tick “Tenant” in the quote form and we’ll take it from there.
More boiler help
- Combi boilersHot water on demand, no tanks
- Boiler replacementSwap an old or broken boiler
- ConversionsSystem, regular or back boiler to combi
- Boiler repairBreakdowns, leaks, fault codes
- Boiler servicingAnnual service and landlord certificates
- Installation costWhat decides the price
- Emergency repairNo heating or hot water today
- Landlord certificatesAnnual gas safety record (CP12)
- Power flushClear sludge, fix cold radiators
- Moving a boilerNew room, new wall or the loft
Get a fixed price for your boiler
Answer a few quick questions, add a photo if you can, and a Gas Safe engineer will come back to you with a price.