Vaillant Advance Installer
London · Platinum Tier
Searching for a Vaillant approved installer in London? DGN GAS is accredited under Vaillant Advance at Platinum level — the highest tier — fitting ecoTEC boilers with extended guarantees of up to 10 years on eligible models.
A Vaillant Advance installer
at the highest tier
If you're searching for a Vaillant approved installer in London, DGN GAS is accredited under Vaillant's official installer programme, Vaillant Advance — and we hold Platinum status, the highest tier within the scheme. It's a level reached through a consistent record of quality Vaillant installations, and it reflects the standard we hold ourselves to on every job.
For you as a homeowner, that means your Vaillant boiler is installed by an accredited Advance engineer and registered correctly with the manufacturer — with extended guarantees of up to 10 years on eligible models.
Vaillant ecoTEC
& the wider range
ecoTEC Plus Combi
Vaillant's flagship combi — quiet, compact and highly efficient. A favourite for London flats and family homes where space and reliability matter, and eligible for the longest Vaillant guarantee when registered by an Advance installer.
ecoTEC Plus System
Paired with a Megaflo or unvented cylinder for homes with multiple bathrooms and a high hot-water demand. The premium choice where strong, simultaneous flow is essential.
Vaillant guarantees
by model
Vaillant's premium flagship
Combi, system & regular
Combi, system & regular
Standard registration
Maximum terms require Advance-accredited installation with the Advance boiler protection kit, registration within 30 days, and annual servicing by a Gas Safe registered engineer. We'll confirm the exact cover for your boiler when we quote.
What Platinum-tier
accreditation means for you
Anyone can fit a boiler. An accredited Vaillant Advance installer fits it to the manufacturer's standard, registers the guarantee properly, and stands behind the work. Reaching Platinum — the top tier — is recognition from Vaillant of a sustained record of quality installations, not a one-off badge.
As a premium, founder-led company, DGN GAS treats every Vaillant installation as a long-term relationship: correctly sized, cleanly installed, fully registered, and looked after with annual servicing across West, North West and South West London.
Vaillant installer
questions answered
Are you an approved Vaillant installer in London?
Yes. DGN GAS is accredited under Vaillant Advance — Vaillant's official installer programme — at Platinum level, the highest tier. We install and register Vaillant boilers right across London.
What warranty can I get on a new Vaillant boiler?
Up to 10 years on eligible models such as the ecoTEC plus, ecoTEC exclusive and ecoFIT pure, when registered by an accredited Advance installer with the Advance protection kit. The ecoTEC pro carries up to 7 years. The boiler must be serviced annually to keep the guarantee valid — we'll confirm the cover for the model we recommend.
Which Vaillant boiler is right for my home?
It depends on your property size, number of bathrooms and hot-water demand. We size every installation to the home rather than applying a standard spec — an ecoTEC Plus combi suits many flats and houses, while larger homes often pair an ecoTEC Plus system boiler with a Megaflo cylinder.
Vaillant
installation questions
Are you a Vaillant approved installer?
Which Vaillant boilers do you install?
What warranty can I get on a Vaillant boiler?
Why choose Vaillant?
Do you install Vaillant boilers across London?
"Ravinder at DGN Gas has consistently looked after me. Alongside the annual boiler service, they carried out the Vaillant boiler and underfloor heating installation at my home. I’ll be using them again."
Planning a Vaillant boiler installation?
Speak to a Vaillant Advance Platinum installer about your new boiler. London-wide installation.
Get a Quote 07813 474638