Vitodens 100-W Heat Only

A compact and efficient heat only gas boiler

An heat only, wall mounted gas fired condensing boiler which is compact enough to fit in a standard kitchen cupboard. Also suitable for use in other applications where there is only limited space available.

  • EfficiencyLabel
  • Designed for
  • Powered by
  • Up to
    32 kW
  • Energy efficiency
  • Ultra compact
  • Smart home
  • Standard warranty
    5 years
  • Made in
  • Rated outputs: 11 kW, 16 kW, 19 kW, 25 kW and 32 kW
  • Compact dimensions to fit in standard kitchen cupboards
  • ERP efficiency 93% (Class A)
  • Weather compensation option
  • Large user display
  • 5 year comprehensive warranty as standard
  • Viessmann Trained Installers can now offer their customers an extended warranty option up to 12 years

Key Benefits

Efficient, durable, quiet

The corrosion-resistant stainless steel Inox-Radial heat exchanger with unrivalled wall thickness, is extremely durable and achieves efficiency levels of up to 93%.

The boiler's special design ensures the very low operating noise of 39 dB(A) maximum (26 kW), which is perfectly acceptable even in the kitchen.

Intelligent weather compensation

The Vitodens 100-W Open vent can even operate in weather compensated mode without incurring a costly heating system modification, all that is needed is a simple upgrade.

Weather compensation acts like an auto-pilot as it detects outside temperature changes and automatically adjusts the flow temperature of the boiler, achieving gas savings of up to 12% in the process.

Compact dimensions

With a depth of only 285 mm (340 mm on the 32 kW model) the compact Vitodens 100-W Open vent boiler is perfectly suited for integration into standard kitchen cupboards.

It can also be used in a vast number of other applications where there is only limited space available.

Versatile system solutions

Whilst being specifically designed for open vent heating systems, the Vitodens 100-W heat only is suitable for sealed systems using an additional expansion vessel safety valve.

The boiler also shares the various flue options available for the Combination and System models of the Vitodens 100-W gas condensing boiler range.

Efficiency Label

A decision-making aid for buying a new heating system. The ErP directive is a new, energy efficiency identification, standardised throughout Europe; making energy consumption more transparent.

Want more information about this product?

Not sure which gas boiler you need? Use our simple tool.

Product Data

WiFi module available to allow your heating engineer to monitor your system remotely.

Vitodens 100-W Heat Only Brochure

Weather compensation


Vitodens 100-W Heat Only

Vitodens 100-W Heat Only

Output (kW)

Vitodens 100-W Heat Only

3.2 kW to 32 kW


Vitodens 100-W Heat Only

ERP efficiency 93% (Class A)


Vitodens 100-W Heat Only

Natural Gas 

Application range

Vitodens 100-W Heat Only

Residential buildings, commercial enterprises, local authority premises, new builds and modernisation projects


Vitodens 100-W Heat Only

Easy to use dials with a large LCD display

Heat Only boiler

Vitodens 100-W Heat Only

 Rated outputs: 11 kW, 16 kW, 19 kW, 25 kW and 32 kW

Additional features

Vitodens 100-W Heat Only

MatriX cylinder burner and Inox-Radial heat exchanger

Energy efficiency class

Vitodens 100-W Heat Only


Application range

Vitodens 100-W Heat Only

Detached and two-family house, apartment buildings, new build and modernisation projects

Like what you see? Get a quote from a local installer.

Related Products

Vitodens 050-W
A compact, great value combi and system boiler

With compact dimensions, low weight and quiet operation, the attractively priced Vitodens 050-W gas condensing boiler will integrate effortlessly into any living space. Which? Best Buy, Vitodens 050-W 29 kW Combi.

Discover the Vitodens 050-W
  • Up to 10 years
  • Hydrogen
    H2 20% Blend
  • Easy control with
    LED Display
  • Smart Home
Discover the Vitodens 050-W
  • EfficiencyLabel
  • EfficiencyLabel
Trending topics
Latest Topics