The Viessmann Vitodens 100-W is the flagship wall-mounted gas condensing boiler in the Vitodens range, pairing the MatriX-Plus gas burner with intelligent Lambda Pro combustion control and the corrosion-resistant Inox-Radial stainless steel heat exchanger.
This 32kW system boiler variant heats a separate hot water cylinder, making it well suited to properties with higher heat loss or multiple bathrooms where a stored hot water solution is preferred over an instantaneous combi.
32kW
System output
94%
Seasonal efficiency (ηS)
1:10
Modulation range
Class A
Energy efficiency
360mm
Depth
WiFi
Built-in connectivity
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Please Note: This boiler must be connected using the Viessmann 60/100mm concentric flue system, tested and CE-designated as one structural unit with the boiler in accordance with DVGW-VP 113. Only this flue system may be used, with maximum flue lengths varying by model — check the installation manual for the exact figure.
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Good to Know: This boiler is approved for a hydrogen admixture of up to 20% by volume and can be configured for LPG entirely from the control unit — no separate conversion kit is required.
MatriX-Plus burner with Lambda Pro
Delivers extremely clean combustion and quiet operation, with automatic combustion control across the full modulation range.
Wide 1:10 modulation range
Reduces cycling frequency even at low heat demand, improving comfort and efficiency at partial load.
Inox-Radial stainless steel heat exchanger
Provides high operational reliability and a long service life on a compact footprint.
Variable speed high efficiency circulation pump
Cuts pump power consumption by up to 70% compared with a fixed-speed equivalent.
Integral WiFi with local app access
Supports the ViCare app for remote control, plus local commissioning access without an active internet connection.
Touchscreen control unit
Easy day-to-day operation via a backlit LCD touchscreen display.
Specification
Performance
Boiler type
Gas condensing system boiler (Type B1HF)
Rated heat output (50/30°C)
3.2 – 32.0 kW
Rated heat output (80/60°C)
2.9 – 29.3 kW
Standard seasonal efficiency (Hs)
Up to 98%
Seasonal central heating efficiency (ηS)
94%
Energy efficiency class
A
Modulation range
1:10
Sound power level (rated output)
48.4 dB(A)
Gas & Electrical
Gas types
Natural gas and LPG (configured at control unit)
Hydrogen compatibility
Up to 20% H2 blend
Natural gas supply pressure
20 mbar
LPG supply pressure
50 mbar
Electrical supply
230V~, 50Hz
Power consumption (delivered condition)
113W
Dimensions & Connections
Height
700mm
Width
400mm
Depth
360mm
Weight (excl. water)
32kg
Flue gas connection
60mm
Ventilation air connection
100mm
Boiler flow and return
R 3/4"
Cold water and DHW connections
G 1/2"
Expansion Vessel
Capacity
8 litres
Pre-charge pressure
0.75 bar
Max. permissible operating pressure
3 bar
What's the difference between the system boiler and combi versions of the Vitodens 100-W?
The system boiler (B1HF) heats a separate hot water cylinder rather than providing instantaneous hot water, making it suited to properties with higher hot water demand or multiple bathrooms.
Does this boiler require a mounting jig?
Yes, a pre-plumbing jig or valves/fittings pack for surface or flush mounting must be ordered separately — several mounting options are available depending on installation type.
Can the Vitodens 100-W be used in multi-boiler or cascade systems?
Yes, a multiple connection variant (B1HF-M) is available for vertical multiple connection or horizontal cascade installations, fitted with an internal back draught safety device.
What's the maximum modulation range on this boiler?
The 32kW model offers a 1:10 modulation range, helping to minimise burner cycling and improve comfort at low heat demand.
Is a WiFi modem needed for the ViCare app?
No, WiFi connectivity is integral to the control unit on this model — no separate modem accessory is required.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
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