Trustpilot

iS System Boiler

Every ATAG boiler carries a 12-year warranty as standard, with an option of 18 years!

With output sizes of 15kW, 18kW, 24kW, 32kW and 40kW, the compact casing of the iS range houses an outstandingly efficient boiler that offers excellent, low-maintenance performance and is easy to install.

Furthermore, we have made these easy for homeowners to operate. With the addition of a 3 port valve kit, the iS system boilers can be controlled using an ATAG ONE Zone or Tado V3+ smart controller.

Key features and benefits

Specifications

i15S
i18S
i24S
i32S
i40S

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PART NUMBER

BS300315

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

93

CH OUTPUT KW (50/30°C)

14.7

SEDBUK 2009 (%)

89.8

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG (KG)

39

STANDARD WARRANTY (YEARS)

10

LPG CONVERSION KIT AVAILABLE

YES

NOX CLASS

6

INGRESS PROTECTION (IP)

IPPX4D

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

18

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

50

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PART NUMBER

BS300318

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

93

CH OUTPUT KW (50/30°C)

17.5

SEDBUK 2009 (%)

89.8

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG (KG)

39

STANDARD WARRANTY (YEARS)

10

LPG CONVERSION KIT AVAILABLE

YES

NOX CLASS

6

INGRESS PROTECTION (IP)

IPPX4D

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

18

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

50

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PART NUMBER

BS300324

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

CH OUTPUT KW (50/30°C)

23.2

SEDBUK 2009 (%)

89.8

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG (KG)

39

STANDARD WARRANTY (YEARS)

10

LPG CONVERSION KIT AVAILABLE

YES

NOX CLASS

6

INGRESS PROTECTION (IP)

IPPX4D

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

18

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

50

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PART NUMBER

BS300332

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

CH OUTPUT KW (50/30°C)

31.2

SEDBUK 2009 (%)

89.8

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG (KG)

42

STANDARD WARRANTY (YEARS)

10

LPG CONVERSION KIT AVAILABLE

YES

NOX CLASS

6

INGRESS PROTECTION (IP)

IPPX4D

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

18

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

45

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PART NUMBER

BS300340

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY CLASS

A

ERP SEASONAL SPACE HEATING ENERGY EFFICIENCY (%)

94

CH OUTPUT KW (50/30°C)

38.8

SEDBUK 2009 (%)

89.8

DIMENSIONS (H X W X D) MM

700X440X355

BOILER LIFT WEIGHT WITH JIG (KG)

42

STANDARD WARRANTY (YEARS)

10

LPG CONVERSION KIT AVAILABLE

YES

NOX CLASS

6

INGRESS PROTECTION (IP)

IPPX4D

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

18

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

45

3

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
2

Cylinders

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

View all Cyclinders
Flyer Water Treatment Pack

Chemicals and filters

We have a range of chemicals and filters that can be used with our boilers.

View all chemicals and filters

Interested in becoming a ATAG Selected Partner?

If you’re interested in becoming a ATAG Selected Partner, simply click on the button below to submit your form. If you’d like more information about our boilers, why not book a demo below?

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