Edwardian terraces
Most already have a combi. A few older ones still run a regular boiler with loft tanks, which is a combi conversion rather than a swap.
Combi boilers · Norbury SW16
Combi boiler installation in Norbury
Most of Norbury’s Edwardian terraces made the switch to a combi years ago. So the job here is often replacing a combi that’s reached the end of its life, and getting the new one set up properly. We also fit combis in the smaller estate homes and in interwar semis where it suits.
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Second-time combis
Replacing the combi you already have
If your Norbury terrace already has a combi, the replacement is usually the most straightforward job we do. The new boiler goes in the same place, uses the same gas and water connections, and gets a new flue kit. What changes is everything around it.
Rules and good practice have moved on since many first-generation combis went in. Your new one needs time and temperature controls plus an extra energy-saving measure under Boiler Plus, such as a smart thermostat with automation and optimisation, or weather compensation. The system gets cleaned and dosed with inhibitor to BS 7593, a magnetic filter goes on, and the flow temperature is set low enough to let the boiler condense.
Our Norbury area page covers repairs and servicing too. If you’re not sure a combi is still the right type for your home, start with combi boiler installation.
Before we swap
What we check when a combi replaces a combi
Like-for-like doesn’t mean nothing to look at. These are the things that catch out older installations.
Flue position
A flue that was fine years ago may not meet today’s rules near windows, doors and boundaries. We check before we quote.
Gas pipe size
A new combi can need more gas than the old one. If the pipe from the meter is too small, it gets upgraded.
Mains flow
A combi only gives as much hot water as the cold mains brings in. We measure it, so you know what to expect at the shower.
Condensate route
Outside runs are kept short, insulated and wide enough not to freeze and shut the boiler down in a cold snap.
Sludge in the system
Older systems carry rust and sludge. It’s flushed out before the new boiler fires up, not after it starts to struggle.
Radiator output
If a room was always cold, the radiator may be undersized. We’ll point it out rather than oversize the boiler.
Norbury homes
Three kinds of house, three kinds of combi job
Norbury Estate cottage homes
Smaller homes that suit a compact combi. Space is tight, so where the boiler sits and how the flue leaves the house matter more than the model.
Interwar semis
A mix of combis and system boilers. With one bathroom a combi is usually right. With a bathroom and en-suite in use together, we may suggest a system boiler.
Smaller homes
Getting a compact combi right
In the cottage-style homes on the Norbury Estate the boiler often has to fit a small cupboard, and there may be only one sensible wall for the flue. Compact combis are made for exactly this, but the casing size, the service clearances the manufacturer asks for and the flue route all have to work together. That’s why we ask for a photo of the cupboard and the outside wall.
A smaller house doesn’t always mean the smallest boiler. Size comes from your hot water demand and the home’s heat loss, and the radiators have to be able to put that heat into the rooms. We check all three.
Comparing quotes
What your Norbury combi quote should include
Use this to compare any quotes you get, ours included.
A proper installation includesWhy it mattersAsk on any quote
A survey of flue, gas supply and water flow
Decides the boiler size and whether a combi will give decent showers.
“How did you size the boiler?”
System cleaned to BS 7593, with inhibitor
Sludge from the old system is the main killer of new boilers.
“Is a full system clean included?”
Magnetic system filter
Keeps catching debris for the life of the boiler.
“Which filter, and where will it go?”
Controls that meet Boiler Plus
A legal requirement in England, and it saves gas.
“Which controls are included?”
New flue kit, positioned to the rules
Reusing an old flue or a bad position can fail inspection.
“Is the flue new, and where will it exit?”
Condensate pipe protected from frost
A frozen condensate pipe is the most common winter breakdown.
“Where will the condensate drain?”
Old boiler, tanks and cylinder removed
Disposal costs money. Make sure it’s not an extra on the day.
“Is removal and disposal included?”
Building Control notified, warranty registered
Without them, selling the house and claiming on the warranty get harder.
“Who notifies, and who registers the warranty?”
Combi boiler installation nearby
FAQ
Combi questions from Norbury
You’re Croydon based. Do you cover Norbury?
Yes. Norbury sits right on the Croydon border in SW16, and we cover it routinely, along with Thornton Heath next door.
My combi is old but still works. Should I replace it now?
If it’s reliable and safe, there’s no rush. If repairs are getting frequent, parts are hard to find or it’s been declared unsafe, replacing it on your own terms beats a winter breakdown. We’ll tell you honestly which side of that line you’re on.
Can a small combi heat my house properly?
Usually yes. Radiator output and the home’s heat loss matter more than the boiler’s size. We check both before recommending a model.
Do I have to move my boiler to fit a new one?
No. Most combi replacements go in the same spot. We’ll only suggest moving it if the flue position no longer meets the rules or you want the space back.
Is parking a problem in Norbury?
It’s mostly street parking, and some roads near the station are controlled. Mention it in the quote form and tell us if a visitor permit is possible.
Guides
Read before you decide
- Choosing a boilerShould you repair or replace your boiler?Should you repair your boiler or replace it? An honest way to decide, looking at age, parts, repair history, efficiency and warranty, without the sales pitch.Read the guide
- Rules and paperworkBoiler Plus regulations explainedWhat Boiler Plus means for a new gas boiler in England: the controls every boiler needs, the extra measure a combi needs, and what to check when you buy.Read the guide
- Running costsBoiler flow temperature: should you turn it down?How lowering your combi boiler’s central heating flow temperature helps it condense and use less gas, how to find the setting, and when not to turn it down.Read the guide
Everything we do
New boilers
Conversions
Repairs & servicing
Price a new combi for your Norbury home
Tell us what you have now and add a photo. A Gas Safe engineer will call with a fixed written quote.