How we're operating during the COVID-19 pandemic

Find out more How we’re operating during COVID-19
  • Get the best quotes, fast!
  • Over 5,000 engineers across the UK
  • Gas Safe registered engineers

Need a New Boiler?

Get FREE no-obligation quotes now!

  • No delays! Get quotes today
  • Compare quotes & get the best prices
  • Gas Safe & OFTEC registered engineers
 4.8 stars

1,285 reviews

 4.8 stars

1,285 reviews

ATAG I18S 18 kW System Gas Boiler

ATAG I18S 18 kW System Gas Boiler Boiler
Typical Price (inc VAT)
£N/A
Typical installation Cost (inc VAT)*
£500 - £1000
Sundries (Filter, Flue, etc)
£300

Get a quote to install this boiler

Need a repair instead? Get a repair quote
Make ATAG
Model I18S 18 kW System Gas Boiler
Is Condensing Condensing
Efficiency Rating 93%
Band Rating A Rated
LPG Compatible Yes
Standard Warranty Up to 14 Years
Central Heating Max. Output 17.5 kW
Mounting Wall Mounted
Flow Rate N/A
Typical Price (inc VAT) £N/A
Typical installation Cost (inc VAT)* £500 - £1000
ERP Rating A Heat

* This is a guide price for a straightforward, like-for-like boiler replacement. Installation costs will vary dependent on work required.

Get a quote to install this boiler

Need a repair instead? Get a repair quote
Product Description

The IS18 System gas boiler has been designed and manufactured by ATAG as a wall mounted unit. With compact dimensions of just 700x440x355mm (H x W x D) it should fit neatly into any home.

It delivers an impressive A rated efficiency of 89.8% which could help to save you money on your energy bills and reduce your home’s carbon footprint. The output rating of 18kW makes it best suited to smaller homes with not such a high demand for heating or hot water e.g. no more than one bathroom. This boiler is also available in a wide range of other outputs from 15kW to 40kW so there is a unit to suit most sizes of home.

As a System boiler it will produce hot water for your radiators and for your hot water storage cylinder such as the ATAG iSteel hot water tank. The in-built pump means the heat given out by the boiler is kept to a minimum to improve energy efficiency even further.

The unique iCon heat exchanger has a lifetime replacement guarantee and, with a 10 year warranty on the rest of the unit, you can rest assured that this boiler is a reliable investment for your home.

You even have the option of extending the warranty to 14 years which can be done by adding a Adey Atom filter, ONEZone smart controller and water treatment to the installation.

Get a quote to install this boiler

Need a repair instead? Get a repair quote

Get a quote to install this boiler

Need a repair instead? Get a repair quote

Need a new boiler?

Get FREE no-obligation quotes now!

Excellent 4.8 out of 5

Find approved boiler engineers
in your area.

Begin your search by entering your postcode below.

Or select your region from the list and start your search