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ATAG Combi Boilers

Why Choose ATAG?

ATAG have been designing and manufacturing boilers for nearly 70 years. Driven by setting the highest standards for energy efficiency and engineering excellence, ATAG boilers are highly reliable and efficient.

At the very heart of every ATAG boiler is the revolutionary iCon heat exchanger, which has unparalleled performance and efficiency levels – managing to maintain a 98% efficiency level throughout its lifetime.

ATAG has won many global awards for their efforts in manufacturing efficient and reliable heating products.

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Combi Boiler Terms And Definitions

Below are some important terms and definitions that you should look out for when purchasing a new/replacement combi boiler for your home. We've also included helpful links to related articles on our website for further reading.


A combi boiler’s size is measured in kilowatts (kW) – the more kilowatts it has, the bigger and more powerful it is. Read our What Size Combi Boiler Do I Need? article to help you choose the right size combi boiler to match your home's heating needs.


Modern combi boilers are super efficient - meaning less energy and money is spent to keep your home warm and cosy. Read our Saving Money With A New Combi Boiler article to find out how a modern combi boiler could help you to reduce your energy bills.

Flow Rate

Flow rate represents how many litres of water can flow through the combi boiler and how fast it can come out of a tap or shower head, once the combi boiler is running. Read our Boiler Flow Rates article for more on how to choose the correct combi boiler flow rate for your home.


A boiler warranty is essentially a guarantee from the manufacturer that promises to repair or replace a defective component or device within a specified period. Read our Boiler Warranty Guide for the things you should look for in your combi's warranty.

ATAG Combi Boilers

Below are the latest combi boilers available from ATAG.
Prices listed are for standard models and should be used as a 'guide price'. We are not able to show every possible retailer and cheaper prices may be available.

worcester gas combi boilers


worcester gas combi boilers


worcester gas combi boilers


worcester gas combi boilers


kW (range)
kW Range: i24C-i40C
Efficiency: 94%
Warranty: 10 Years
Cost: £950
View Details

Combi Boiler Manufacturers

Prices are ordered from lowest to highest, irrespective of retailer rating or stock. We are not able to show every possible retailer and cheaper prices may be available. When you click on a retailer link on our site, we may earn affiliate commission. This supports our not-for-profit mission to empower consumers and in no way affects our recommendations. Find out more.

34kW Worcester Combi Boiler Sesonal Pro
34kW Worcester Combi Boiler
34kW Worcester Combi Boiler
34kW Worcester Combi Boiler