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Viessmann Vitodens 100-W Combi Boiler 35kW B1KF (7970763)


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Viessmann Vitodens 100-W Combi Boiler 35kW B1KF (7970763)


  • Boasts an attractive price/performance ratio
  • Equipped with a durable and efficient stainless steel Inox-Radial heat exchanger
  • Features a modulating, fan-assisted premix burner with Lambda Pro for high efficiency and low emissions
  • Compact design and low weight
  • Quiet operation thanks to low fan speed
  • Output 3.2 to 35kW
  • High quality stainless steel Inox-Radial heat exchanger
  • Up to 94% of the fuel used is converted into heat
  • Class A rated for energy efficiency
  • Low CO2 emissions for reduced environmental impact
  • User friendly LCD Touch screen for easy operation
  • Wi-Fi interface now included as standard
  • Connects the heating system directly to the internet, if required
  • Optional ViCare Thermostat means no third-party controls are required
  • Provides smart phone control of heating and hot water
  • Allows the system to be remotely monitored by your local heating engineer
  • 5 year guarantee can be extended to 7 years when installed by Viessmann accredited installer


  • Enjoy simple and intuitive operation via the LCD touch screen display or ViCare app
  • Stay connected with the integrated WiFi interface for comfort, energy savings, and safety
  • Benefit from the energy-saving high-efficiency circulation pump and modulation range up to 1:10
  • Achieve an energy efficiency class of A

Standard Delivery:

  • Fully plumbed and wired with wall mounting bracket included
  • Detailed touch screen LCD display offers easy and intuitive menu
  • Boasts heating system frost protection monitoring and function
  • Controls solar DHW heating with EM-S1 extension (see accessories)
  • Conveniently controls direct and mixed heating systems
  • Features a fully automatic Lambda Pro combustion control system
  • Certified for 20% hydrogen content in natural gas and LPG ready

Boiler Control Platform:

  • Offers easy operation with a touch screen LCD display and clear, simple menu
  • Boasts a discreet “black panel” visual design
  • Monitors and protects the heating system from frost
  • Controls solar DHW heating with EM-S1 extension (accessory)
  • Conveniently controls direct and mixed heating systems

Lambda Pro Combustion Control:

  • Boasts a fully automatic system that adapts to all gas types
  • Certified for 20% hydrogen content in natural gas
  • LPG ready without requiring a conversion kit
  • Ensures continuously clean and efficient combustion

ViCare Thermostat (accessory):

  • Offers load-compensated control that meets ‘Boiler-Plus’ requirements
  • Features a battery-powered RF connection
  • Cannot be used with an outdoor temperature sensor (weather compensation)

Viessmann Boiler Warranty Features:

  • Viessmann offers a range of warranty options for homeowners, trained installers, and non-Viessmann trained installers.
  • Many Viessmann boiler models come with a comprehensive 5-year parts and labour warranty as standard.
  • Optional warranty extensions are available for trained installers, including 7, 10, or 12-year warranties (additional fee applies).
  • The Vitodens 100-W model comes with a 5-year standard warranty and a 5-year warranty for trained installers, with the option for extended warranties.


Product Code 7970763
MPN ZK06237
EAN 4054465322036
Type Gas Boiler
Sub Type Gas Combi
Colour White
Warranty (Years) 5
Width (mm) 400
Height (mm) 700
Depth (mm) 360
Weight (Kg) 35
Output (Kilowatts) 35
ErP Space Heating Efficiency A
ErP Water Heating Efficiency A
Flow Rate (L/min) 17
Fuel Natural Gas
Mounting Wall


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