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ATAG iC Combi Boiler

The ATAG iC Combi is available in a range of outputs to suit all homes and requirements.

Quiet and compact, the ATAG iC Combi is a high efficiency gas-fired condensing boiler that’s an ideal choice for homes with limited space as it can fit inside a kitchen cupboard. It’s also an Energy Saving Trust endorsed product, so you can count on this boiler to help you not only save you money on your bills but also reduce your carbon footprint. Furthermore, the ATAG iC Combi comes in a variety of outputs to suit practically every type and size of home, from small apartments to large houses.

How Much Does this Boiler Cost?

The ATAG iC Combi is available in four different outputs, including 24kW, 28kW, 36kW and 40kW. As a general guide, the greater your demand for heating and hot water, the higher the output will need to be. The lower output models are slightly cheaper than the higher ones, and you can expect to pay between £1,300 and £1,480 to purchase this boiler. These prices do include VAT but they don’t include the cost of installation, so be sure to put some extra money aside to pay for the fitting work.

How will I know if this Boiler is Suitable for My Home?

ATAG has designed the iC Combi to suit small, medium and large-sized homes where space is limited. By being a combi boiler, it doesn’t need to be installed with a hot water storage cylinder nor does it require any additional tanks in the loft to deliver heating and hot water. You do, however, need to pick the correct boiler size for your home and requirements, otherwise, you could end up with an undersized boiler that won’t heat your home properly or an oversized boiler that will waste energy and cost you more to run.

The smaller outputs (sizes) are perfect for small homes with one bathroom and the larger output should meet the needs of medium to large homes with two bathrooms. Working out the correct size boiler for your requirements isn’t an easy task, so we suggest you ask a trusted Gas Safe registered engineer to do this for you.

Is it a High Efficiency Boiler?

It sure is. The ATAG iC Combi achieves an A rating for heating and hot water, so you can rest assured that it’s a high-efficiency boiler. Thanks to ATAG’s engineering excellence, this boiler has been endorsed by the Energy Saving Trust and can actually save you up to £320 on your gas bills every year. And if you pair the boiler with the ATAG OneZone smart controller, the iC Combi will achieve a maximum A+ rating for efficiency. 

Does this Boiler have a Good Range of Controls and Features?

It’s a user-friendly unit with intuitive controls and will show detailed fault codes on its LCD display to make it easy for your engineer to diagnose problems. The ATAG iC Combi has built-in frost protection and a built-in weather compensator to improve efficiency and ensure you home always remains comfortable. This boiler also has an ATAG iCon stainless steel heat exchanger that comes with a lifetime guarantee. Like we said before, the boiler can be used with an optional ATAG OneZone controller, which enables you to control your heating and hot water via a tablet or smartphone.

How long is the Warranty on this Boiler?

The ATAG iC Combi comes with a 10-year warranty as standard. However, you can increase this to 11 years when you purchase the filter only pack or 12 years with the water treatment pack. You can even increase your standard warranty from 10 to 14 years when you buy the complete care pack, which includes the OneZone smart controller.

Summary of Important Information

  • Expect to pay between £1,300 and £1,480
  • Heating output of 24kW, 28kW, 36kW or 40kW
  • Hot water flow rates of 10.1, 11.5, 14.9 or 16.2 litres per minute
  • Dimensions of 700mm (H) x 440mm (W) x 355mm (D)
  • Uses gas as its fuel source
  • A-rated for efficiency
  • Compatible with smart controls
  • 10-year warranty as standard

Pros and Cons

Although not the cheapest combi on the market, the ATAG iC Combi is a fantastic boiler that has some impressive features and a lengthy warranty. The brand’s ‘Excellent’ rating on Trustpilot shows us that homeowners are happy that they chose an ATAG boiler and it seems as though they’re impressed with the after-care service too. There are no cons with this one, so below is a list of just pros.


  • Suited to small, medium and large-sized homes
  • Easy to install, use and service
  • Intuitive controls and LCD display
  • ATAG iCon stainless steel heat exchanger with a lifetime guarantee
  • Built-in frost protection and weather compensator
  • Provides maximum energy efficiency – reduce fuel bills and carbon emissions
  • Compatible with the ATAG OneZone controller – improves efficiency and comfort
  • Excellent rating on Trustpilot – correct at time of writing in November 2020
  • 10-year warranty as standard
  • Warranty can be increased to 11, 12 or 14 years
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