ATAG Installer London
Up to 18-Year Warranty
Searching for an ATAG installer in London? DGN GAS installs premium, Dutch-engineered ATAG boilers — with 12 to 18-year warranty options across the range — among the longest manufacturer’s guarantees available in the UK.
ATAG boilers — the UK’s
longest boiler warranty
If you’re searching for an ATAG installer in London, DGN GAS installs the full ATAG range as part of our London boiler installation service — premium boilers precision-engineered in Holland and built around ATAG’s stainless-steel iCon heat exchanger. As an ATAG Installation Partner, we offer 12 to 18-year warranty options across the range — among the longest manufacturer’s guarantees available on a domestic gas boiler in the UK.
ATAG sits firmly in the premium bracket — quiet, highly efficient, and exceptionally well-built. For homeowners who want the best long-term peace of mind, it’s one of the strongest choices on the market.
The ATAG range
combi, system & regular
ATAG iC Series
Compact combi boilers delivering heating and instant hot water from one unit — ideal for flats and family homes without a cylinder. Available as the iC 24, 28, 36 and 40, with hot-water flow rates from 10.1 to 16.2 litres per minute (at a 35°C rise) to match anything from a one-bed flat to a busy family home. The iC Economiser models add passive flue-gas heat recovery for extra efficiency.
ATAG iS & iR Series
System (iS) and regular/heat-only (iR) boilers that pair with a cylinder for homes with multiple bathrooms or traditional setups. The iR Regular range runs from 15kW to 40kW, suiting most homes whatever the hot-water demand — and is a natural match for a Megaflo cylinder where strong, simultaneous hot water matters.
Up to 18 years
across the range
Built to last
— and guaranteed to
An 18-year warranty is only worth having if the boiler is built to match it. ATAG’s stainless-steel iCon heat exchanger is engineered to retain its efficiency over its lifetime, which is why ATAG can stand behind it for years to come.
As a premium, founder-led company, DGN GAS installs ATAG to the manufacturer’s standard and looks after it with annual servicing across West, North West and South West London.
They’re practical to live with, too. At 700mm high and 440mm wide — with a slim 275mm-deep option made to fit inside a standard kitchen cupboard — an ATAG sits discreetly in most homes. A filling loop, frost protection and the iCon stainless-steel heat exchanger are built in as standard, and the range is Boiler Plus compliant out of the box.
ATAG installer
questions answered
Do you install ATAG boilers in London?
Yes. DGN GAS installs the full ATAG range — iC combi, iS system and iR regular boilers — right across London, with 12 to 18-year warranty options across the range.
What warranty comes with an ATAG boiler?
ATAG offers 12 to 18-year warranty options across the range — among the longest manufacturer’s guarantees available on a domestic gas boiler in the UK. We’ll confirm the exact cover for your chosen boiler when we quote.
Why choose ATAG over other premium brands?
ATAG offers the longest manufacturer’s warranty in the UK, with quiet, highly efficient, Dutch-engineered boilers and a stainless-steel heat exchanger built for longevity. If maximum long-term peace of mind is the priority, it’s one of the strongest options available — and we’ll always talk you through how it compares with our Vaillant Advance, Worcester Bosch and Baxi options for your home.
"DGN GAS have been working with my firm for years. They've carried out boiler installations, unvented cylinder work and underfloor heating systems using top-quality brands including Vaillant, Worcester Bosch, Baxi and Megaflo. Workmanship and service are consistently excellent."
Considering an ATAG boiler?
Speak to us about an ATAG installation and the UK’s longest boiler warranty. London-wide installation.
Get a Quote 07813 474638