An older Viessmann
A swap within the same family is often simpler, as boilers in one range often share a similar layout. Older models can differ, so we check your photos.
Viessmann · Croydon
Viessmann boiler installation in Croydon
Thinking about a Viessmann? We fit Vitodens gas boilers across Croydon and South London. Tell us about your home and we’ll recommend the model, the output and the controls, with a fixed written quote.
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Prefer to talk? Call 020 3856 8293
- About 2 minutes
- No obligation
- Used only for your quote
Fixed written price
- Gas Safe No. 567789Check us on the register
- Fixed written quoteThe price you agree is the price
- City & Guilds certifiedTrained and qualified
- Fully insuredPublic liability cover
Viessmann Vitodens
A German maker, chosen on purpose
Viessmann is a German manufacturer, and its wall-hung gas boilers are sold under the Vitodens name. People who ask us for one usually have a reason: they’ve had one before, or they’ve read about the brand and want it.
That’s a good reason to start with, and we’re happy to fit one. We fit all the major brands, so we’ll also tell you plainly if another model would suit your home as well for less.
There’s no Viessmann repair page on this site. If your current boiler has a fault, see boiler repair. We repair most makes, and we’ll tell you if a repair is worth it before you think about replacing.
Choosing a Vitodens
Questions to settle before picking a model
The model name matters less than these. We work through them with you on the quote.
Combi or system?
A combi gives hot water straight from the mains. A system boiler with a cylinder copes better when two bathrooms are in use at once.
The right output
Flats and 1 to 2 bed homes usually need around 24 to 28kW, 3 bed homes around 28 to 32kW. The survey confirms it.
Your mains flow
A combi can only deliver as much hot water as comes in from the street. We measure it before recommending one.
Controls
Viessmann makes its own controls and app for its boilers. Third-party smart thermostats vary, so we check what works properly with your model.
Where it goes
Flue position is regulated near windows, doors, boundaries and eaves, and set by the manufacturer’s instructions. Same position is usually simplest.
Comparing quotes
What your Viessmann quote should include
Whichever brand you choose, a fair quote lists these. Use it to compare like with like.
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?”
Your starting point
What you have now changes the job
Another make of combi
Usually still a one-day job in the same place. The pipes under the boiler normally need some alteration, which is included in the quote.
A system or regular boiler
You can keep the cylinder with a Vitodens system boiler, or convert to a combi and lose the tanks. Converting usually adds a day.
A back boiler
The new boiler goes in a new position, usually the kitchen, and the old one comes out from behind the fire. It’s a longer job.
How it works
How a Viessmann installation works
- 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.
Who you’re dealing with
Don’t take our word for it. Check us.
Anyone working on gas in your home must be on the Gas Safe Register. It takes thirty seconds to check, and you should check whoever you use.
- 1Go to the Gas Safe Register’s “Find an engineer” page.
- 2Enter our registration number, 567789.
- 3On the day, ask to see the engineer’s Gas Safe ID card. The back lists the work they’re qualified to do.
Gas Safe registered
Registration number 567789. Required by law for anyone working on gas appliances.
City & Guilds certified
Formally trained and qualified in plumbing and heating.
Fully insured
Public liability cover for work in your home.
On Track Plumbing & Heating Ltd
A registered limited company, not a one-off trader. Your quote and paperwork come from the company.
FAQ
Viessmann installation questions
Is a Viessmann boiler worth the extra?
For some owners it is, and that’s a fair choice. But a higher price doesn’t by itself mean a better result: correct sizing, a clean system and good controls matter more than the badge. We’ll quote for the Vitodens you want and say honestly if we think a different model would do as well.
Can you fit a Viessmann boiler in a flat?
Yes. In flats the boiler is usually in a kitchen cupboard with a flue through the wall. We check the cupboard size and flue position, and if there’s a managing agent or freeholder, check whether they need to approve a new flue.
Can you repair a Viessmann boiler?
Usually, yes. We don’t have a separate Viessmann repair page, but our engineers repair most makes, and our boiler repair page explains how it works. Check whether the boiler is still under warranty first.
Does a Viessmann need special servicing?
It needs an annual service by a Gas Safe engineer, like any gas boiler, and that service keeps the warranty valid. We can service it for you each year.
How long is the Viessmann warranty?
It depends on the model and how it’s registered. It must be registered after installation and the boiler serviced every year. We register it in your name and tell you what your model comes with on the quote.
Guides
Read before you decide
- Choosing a boilerQuestions to ask a boiler installerThe questions to ask any boiler installer before you book, what good answers sound like, and how to check an engineer’s Gas Safe ID card and registration.Read the guide
- Rules and paperworkBoiler warranties explainedHow boiler warranties work: registration, annual servicing, the Benchmark checklist, what can void a warranty, and the difference from an installer’s guarantee.Read the guide
- 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
Everything we do
New boilers
Conversions
Repairs & servicing
Get a price for a Viessmann
Two minutes in the form and a photo of your current boiler. We’ll come back with a fixed written quote for the Vitodens that fits.