ATAG I36C 36 kW Combi Gas Boiler

Written by James Murfin
Updated on 14th October 2026
Posted on 25th August 2026
Topic: Uncategorised
ATAG I36C 36 kW Combi Gas Boiler
I36C 36 kW Combi Gas Boiler
Total Cost
Manufacturer ATAG
Boiler Model I36C 36 kW Combi Gas Boiler
Condensing boiler? Condensing
Energy Efficiency Rating 94%
Energy Band A Rated
LPG model/Conversion kit Yes
Manufacturer Warranty Up to 14 Years
Heating Output 31.2 kW
Wall Mounted or Floor Standing Wall Mounted
DHW Flow Rate 14.9 l/min
Total Cost
ERP Rating A Heat A Water
Hot Water Max Output 39.3 kW

As a condensing combi-gas boiler, the ATAG i36C 36kW combi boiler can be wall-mounted to installed in your standard kitchen cupboard. This combi boiler’s efficiency rating of 94% could help you lower your energy bills.

ATAG i36C combi boiler is the most powerful in the iC series. It has a 31.2kW output for central heating, and 39.3kW domestic hot water. This combi boiler is great for homes with 15-20 radiators and a single bath.

See all the latest ATAG boiler ranges and prices here. ATAG is the only boiler company offering a huge 14 years warranty on all of their range.

The ATAG has a maximum output of 40kW if your home is hotter. The i24C or  ATAG i28C can be used for homes that have a lower demand. They produce between 24kW to 28kW. If you have higher hot water demand, then there is also the ATAG i40C combi boiler

Why choose the ATAG i36C combi boiler?

Because of their efficiency and compact size, combi boilers are common in UK homes. Combi boilers do not require additional hot or cold water tanks as would a regular boiler or system. Combi boilers work well in homes with restricted space.

ATAG iC combi boilers are 94% efficient, which could help you to save money on your energy bills. You can also pair the ATAG iC combi-boilers with an ATAH ONEZone smart control, which will increase the efficiency by an A to A+ for central heating as well as hot water.

ATAG i36c Combi Boiler Features

  • To fit in kitchen cabinets, a model measuring 275mm (deeper) is available
  • Standard warranty of 10 years, with options for up to 14-years
  • Use the ATAG ONE smart controller or Tado V3+ smart control to control the system from your smartphone
  • ATAG iCon stainless-steel heat exchanger – with its lifetime replacement guarantee
  • LCD Display displays detailed fault codes for faster, more precise boiler diagnosis
  • The built-in weather compensater provides impressive efficiency and greater comfort
  • Boiler Plus compliant
  • Frost protection device built in
  • Thanks to bottom up modulation, quiet operation

Who are our fitters?

We use our own Gas Safe installers and the best installers the UK has to offer. Every single one is Gas Safe registered and has been thoroughly vetted.

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Written by
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James Murfin Job Title
Posted on: 25th August 2026
Topic: Uncategorised

Gas Safe registered heating engineer with over 15 years' experience. Started as a plumber at Aqua Interiors, Wakefield in 2006, then worked as a gas engineer at Help-Link and British Gas before founding Hot Now Heating in Rotherham in January 2017.

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