Vaillant Boiler Installation across London & Kent
Vaillant ecoTEC and ecoFIT pure boilers fitted by our own Gas Safe engineers across South East London and North West Kent. As a Vaillant Advance Installer, we fit a Vaillant boiler protection kit and register every install, giving guarantees of up to 10 years on eligible models. Fixed written quote before any work starts.
Vaillant boilers fitted from £2,350 · See all prices →
Gas Safe Registered
• Google - 4.7★
• Trustpilot - Excellent
• Worcester Bosch Installer
• Vaillant Advance Installer
• Free First annual Service & wireless thermostat free where stated on your written quote
Which Vaillant Boiler Is Right for Your Home?
We fit four Vaillant ranges. The right one depends on the size of your home, how many showers run at once and where the boiler needs to go.
Before we recommend a model, we check your gas supply, mains water pressure and flow rate, and work out the heat your home needs. You get the model and output in writing on your quote.
The ranges we install:
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ecoTEC pro: a combi for flats and smaller homes with one bathroom
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ecoFIT pure: compact enough for a kitchen cupboard, in combi, system and regular models
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ecoTEC plus: Vaillant’s main range, with combi, system and regular models for medium to larger homes
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ecoTEC exclusive: Vaillant’s premium combi, for larger homes that want the highest hot-water flow from a combi
Two or more bathrooms in use at the same time? A Vaillant system boiler with an unvented cylinder may suit you better. See system boiler & unvented cylinder installation.
Your Vaillant Boiler Guarantee: Up to 10 Years
Protection Kit Fitted
Every Vaillant boiler we install gets a Vaillant boiler protection kit, a magnetic filter that catches sludge before it reaches the boiler.
Registered on Vaillant Advance
As a Vaillant Advance Installer, we register your boiler and protection kit with Vaillant. This unlocks the extended guarantee.
Your Guarantee Length
ecoTEC plus, ecoTEC exclusive and ecoFIT pure: 10 years.ecoTEC pro: 7 years, or 10 years as an upgrade shown on your quote.
Keep your guarantee valid with an annual service by a Gas Safe engineer. Manufacturer terms apply.
Set Up to Vaillant’s Instructions
We commission every boiler to Vaillant’s instructions, complete the Benchmark checklist and notify Building Control through Gas Safe. Nothing is left for you to sort out.
Why Choose GX7 for Your Vaillant Boiler Installation?
Own Team, No Subcontractors
The engineers who survey your home are the team who install it. We are Gas Safe registered (935610).
Fixed Written Quote
Your Vaillant model, output, guarantee length and full price are in writing before any work starts.
Tidy, Planned Work
Dust sheets down, neat copper pipework, your old boiler removed, and the system cleaned and protected before handover.
What's Included in Every Installation
Free Home Survey
Gas supply, mains pressure, flow rate and your home’s heat needs checked before we recommend a model.
Sized to Your Home
Vaillant model and output matched to your home, bathrooms and how you use hot water.
Old Boiler Removed
Your old boiler taken out and disposed of responsibly.
Controls Set Up
Thermostat and controls fitted, set up and explained. Exact controls confirmed on your written quote.
System Clean & Inhibitor
System cleaned and treated with inhibitor to BS 7593. Power flush only when your system needs it.
Protection Kit & Scale Reducer
Vaillant magnetic filter to catch sludge, and a scale reducer on the cold mains.
Commissioning & Notification
Radiators balanced, Benchmark completed and Building Regulations notified through Gas Safe.
Guarantee Registered
We register your boiler and protection kit with Vaillant through Advance.
Vaillant boilers fitted from £2,350. Your fixed written quote shows the exact model, controls and price. See all prices →
How Your Vaillant Installation Works
1
Free Survey
We check your gas supply, mains pressure, flow rate, radiators and where the boiler and flue can go.
2
Fixed Written Quote
A clear recommendation with your Vaillant model, output, guarantee length and price, with no hidden extras.
3
Installation
Usually 1 day for a like-for-like combi swap, 2–3 days for system boilers or conversions. We agree any time without heating or hot water in advance.
4
Commissioning & Handover
Benchmark completed, Building Regulations notified, your boiler registered with Vaillant, and controls explained.
5
Aftercare
Your Vaillant boiler needs an annual service to keep its guarantee valid. We’ll remind you when it’s due.
★★★★★
I'm writing to express my sincere appreciation for Mr. Singh's exceptional work on my new boiler installation. He was incredibly helpful, offering various options and clearly explaining the associated costs.
His work was not only fast but also remarkably clean and tidy, with everything completed to a high standard. I am thoroughly impressed with the amazing job he did.
I would highly recommend him without hesitation for any gas related works.
A Makarov - Google review
What Our Customers Say
★★★★★
I recently used Harmeen for a boiler installation and couldn't be happier and more satisfied with the experience. Everything was handled professionally and communicated clearly. Harmeen arrived exactly at the scheduled time and completed the installation efficiently and neatly.
Also, the first service after installation is free!
Would highly recommend them and they genuinely care about doing a good job.
Ashutosh - Trustpilot review
★★★★★
Harmeen and his team have done an outstanding job relocating my boiler. They were honest, reliable, and demonstrated exceptional professionalism throughout. Their thoroughness, attention to detail, and friendliness made the entire process seamless. I cannot recommend them highly enough and will certainly be using their services again. Thank you, team, for a job well done!
M. F. - Google review
Vaillant Boiler Installation FAQs
Ready for Your New Vaillant Boiler?
Book a free survey with our own Gas Safe engineers and get a fixed written quote.
Gas Safe Registered
Vaillant Advance Installer
Clear Written Quotations
We carry out combi conversions across South East London and North West Kent, including Grove Park, Lee, Eltham, Blackheath, Bromley, Chislehurst, Elmstead, Bickley, Petts Wood, Orpington, Chelsfield, Keston, Hayes, Beckenham, Sidcup, Sevenoaks, Otford and Westerham.
Book Your Free Vaillant Boiler Survey
Tell us what boiler you have now and how many bathrooms you have. Photos of your boiler, flue and pipework help us give you an accurate quote.
Get a straightforward quotation from our Gas Safe Registered heating engineers.