Xtreme 24

Xtreme 24

Unique 2-in-1 heat exchanger
Built-in flue gas recovery
Extreme hot water efficiency
Innovative control system

Energy label AEnergy label A XL

  • 20 kW power
  • CW3

Xtreme 24

The Xtreme boiler has been designed with today’s discerning consumer in mind. You demand greater energy efficiency and higher performance from your boiler, but you also want comfort, warmth and peace of mind and that’s exactly what the Xtreme delivers.

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Article number 35004
Signature Output 20
Nominal load upper value kW 4.00 - 20.70
Nominal load lower value kW 3.60 - 18.70
Maximum CH water temperature °C 90
Nominal load lower value tap water kW 3.60 - 25.10
DHW Flow Rate at ΔT 25°C l/min 14.50
DHW Flow Rate at ΔT 35°C l/min 12
DHW temperature (factory setting) °C 55
Height mm 766
Width mm 450
Depth mm 279


  • Intergas Range brochure
  • Xtreme factsheet


  • New service procedure (47.82 MB)
  • Operation instructions Xtreme
  • Installation manual Xtreme (57.72 MB)


  • Warranty Terms and Conditions