Trustpilot

iC Economiser Plus Combination Boilers

iC27+ iC35+ iC39+

Every ATAG boiler carries a 12-year warranty as standard with options up to 18 years, and they’re professionally installed by our ATAG Selected Partners.

The ultimate in domestic efficiency.

Our revolutionary iC Economiser Plus boiler has been described as the combi of the future because it contains an industry-leading innovation, our patented Economiser Plus.

Some years ago, ATAG’s design engineers realised there was untapped residual heat left in the waste flue gases when the boiler was being used for hot water. So they set upon harnessing the wasted energy and the ATAG Economiser was born.

It works by capturing waste energy from the flue gases and uses it to pre-heat the mains water to improve hot water production efficiency, saving both heat and money in the process.

Why not pair the ATAG iC Economiser Plus combination boiler with the ATAG ONEZone smart controller or Tado V3+ to achieve a maximum A+Energy Related Products rating. 

Get a quote Manual Not sure which boiler you require? Key Features Specification

Key features and benefits

compact

Compact dimensions

h700 x w440 x d366 (mm)

warranty

Up to 18 years warranty

Including all parts and labour

user-friendly

Completely user friendly

with intuitive controls

savings

Save on gas bills

Save up to £320 on your gas bills

(www.energysavingtrust.org.uk - April 2017)

instant

Instant hot water

With pre-heat facility

erp-a

ErP "A" rated

Achieves ErP ‘A’ rating for heating and hot water

loved

Loved by customers

ATAG is the UK’s highest rated boiler brand on Trustpilot

  • A 275 mm (deep) model is available to fit inside kitchen cupboards
  • 12 years warranty as standard with the option of 18 years
  • Control the system via smartphone using the ATAG ONE or Tado V3+ smart controller
  • ATAG iCon stainless steel heat exchanger – with its unique lifetime replacement guarantee
  • Detailed fault codes on LCD display for quicker, more accurate boiler diagnostics
  • Built-in weather compensator gives impressive efficiency benefits and increased comfort
  • Boiler Plus compliant
  • Built in frost protection device
  • Quiet in operation due to bottom up modulation
  • A standard boiler casing houses a Built-in Passive Flue Gas Heat Recovery Device

Specifications

i27C Plus
i35C Plus
i39C Plus

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Part Number

BE200327

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

ERP WATER HEATING ENERGY EFFICIENCY CLASS

A

ERP WATER HEATING ENERGY EFFICIENCY (%)

94

ERP DECLARED LOAD PROFILE

XXL

DHW INPUT KW

29.8

CH OUTPUT KW

23.2

FLOW RATE @ 35°C RISE L/MIN

12.6

SEDBUK 2009 (%)

89.7

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG KG

43

STANDARD WARRANTY (YEARS)

12

EXTENDED WARRANTY (YEARS)

Up to 18 Years

LPG CONVERSION KIT AVAILABLE

Yes

NOX CLASS

6

INGRESS PROTECTION (IP)

IPX4D

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 60/100MM

15

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 60/100MM

15

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 80/125MM

50

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 80/125MM

50

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Part Number

BE200335

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

ERP WATER HEATING ENERGY EFFICIENCY CLASS

A

ERP WATER HEATING ENERGY EFFICIENCY (%)

94

ERP DECLARED LOAD PROFILE

XXL

DHW INPUT KW

40.3

CH OUTPUT KW

31.2

FLOW RATE @ 35°C RISE L/MIN

16.1

SEDBUK 2009 (%)

89.7

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG KG

46

STANDARD WARRANTY (YEARS)

12

EXTENDED WARRANTY (YEARS)

Up to 18 Years

LPG CONVERSION KIT AVAILABLE

Yes

NOX CLASS

6

INGRESS PROTECTION (IP)

IPX4D

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 60/100MM

8

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 60/100MM

8

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 80/125MM

40

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 80/125MM

40

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Part Number

BE200339

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

ERP WATER HEATING ENERGY EFFICIENCY CLASS

A

ERP WATER HEATING ENERGY EFFICIENCY (%)

96

ERP DECLARED LOAD PROFILE

XXL

DHW INPUT KW

42.5

CH OUTPUT KW

31.2

FLOW RATE @ 35°C RISE L/MIN

17

SEDBUK 2009 (%)

89.7

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG KG

46

STANDARD WARRANTY (YEARS)

12

EXTENDED WARRANTY (YEARS)

Up to 18 Years

LPG CONVERSION KIT AVAILABLE

Yes

NOX CLASS

6

INGRESS PROTECTION (IP)

IPX4D

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 60/100MM

8

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 60/100MM

8

MAXIMUM EQUIVALENT HORIZONTAL FLUE LENGTH (M) 80/125MM

40

MAXIMUM EQUIVALENT VERTICAL FLUE LENGTH (M) 80/125MM

40

OneZone (3)-1

OneZone

Control the temperature in your home remotely using the ATAG One Zone App, available for FREE on the App Store or Google Play

OneZone smart controller
Cyclinders

Cylinders

Need replacement cylinders? Check out our range to see which one your boiler requires.

View all cylinders
atag_warranty_18yrs_icon

Complete care

Ask your ATAG installer about the complete care pack, including the ONEZone smart controller, to increase your standard warranty from 12 to 18 years.

Find out more

Installers that you can depend on

From design through to installation and after-care service, our ATAG selected gas-safe installers are on hand to offer you excellent advice and the best solution possible that suits your needs.

Find an installer