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Viessmann Vitodens 100-W Combi

Viessmann Vitodens 100-W Combi boilers prices start from £998 incl VAT without installation

The Viessmann Vitodens 100-W is a gas-fired wall mounted combi boiler.  The boiler can be bought in three different sizes to suit your household: 26KW, 30KW, or 35KW.  The Vitodens 100-W is available to buy at an average price of £998 (source: Plumbnation) including VAT but without installation.

Like all combi boilers, the Vitoden 100-W Combi benefits from no cold or hot water storage tank so is is suitable for properties with limited space.

The boilers comes with a stainless steel heat exchanger (Inox-Radial).  This has a high level of heat corrosion resistance helping to reduce maintenance costs and increasing the life time of the boiler.  It  comes with a 10 year warranty as standard.

The  Vitodens 100-W Combi utilises a pre-heat function on its hot water provision giving you instant hot water. This is combined with a hot water flow rate of up to 14.3 litres per minute. This enough to satisfy the demand in most domestic environments.

The boiler also features a combined Pressure Release Valve (PRV) and condensate connection, reducing the number of pipes.   This allows for a faster and more cost effective installation.

Viessmann Vitodens 100-W Combi Boiler Overview


ModelTypeDimensionsMaximum Flow RateOutputEfficiency RatingTypical Price
Vitodens 100-W Combi 26kWCombiH – 725 mm
W – 400 mm
D – 340 mm
N/A26 kWA 90% and above£844
Vitodens 100-W Combi 30kWCombiH – 725 mm
W – 400 mm
D – 340 mm
N/A30 kWA 90% and above£1047
Vitodens 100-W Combi 35kWCombiH – 700 mm
W – 400 mm
D – 350 mm
N/A35 kWA 90% and above£1104
Key Features and Benefits
stainless steel heat exchanger (Inox-Radial)Reduce maintenance costs and increasing the life time of the boiler
Pre-heat functionConstant hot water
SEDBUK A RatingLower Gas Bills
Various Kw Heating Output -26KW, 30KW, and 35KWVarious Home Sizes
Combined Pressure Release Valve (PRV) & condensate connectionEase of installation
Visible Control PanelEase of use
Which Rating 76%Based on reliability, satisfaction & ease of repair
The boiler comes with a standard 5 year guarantee on parts and labour.Peace of Mind

What We Think of the Viessmann Vitodens 100-W Combi boiler

We think this is a good boiler. It’s energy efficient and is reliable.  The boiler got a five star Which reliability rating and scored overall 76% based on reliability, customer satisfaction and ease of repair. The boilers combined Pressure Release Valve and condensate connection makes it easier to install while the visible control panel is easy to use.

The Vitodens 100-W Combi boiler is simple to convert to LPG systems via a conversion kit if your home does not benefit from a natural gas supply.

Getting a Competitive Boiler Quote

It is always best to get a boiler installation quotation from both a national and local boiler installation provider if you want to ensure that you are getting a good deal on your boiler. Ensure that your boiler installer is Gas Safe Registered as this is now a legal requirement.

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