Our range of gas condensing boilers 

Efficient gas heating - with condensing technology

Viessmann gas condenser boilers are equipped with condensing technology. This condensing technology not only utilises the heat generated by combustion but also the water vapour content. This enables them to be able to extract almost all of the heat contained in the flue gases and convert it into heating energy.

Central to the performance of Viessmann gas condensing boilers is the high performance stainless steel Inox-Radial heat exchanger. It is the role of the heat exchanger to cool the flue gases before they escape through the chimney. In doing this, the water vapour contained in these gases is deliberately condensed. This releases additional heat which is transferred into the heating system.

The use of condensing technology within Viessmann boilers means they can achieve efficiency of up to 98% and are rated energy efficiency class A. This energy efficiency means you are looking after both your finances and the environment.

Old Boiler Rating
Annual Saving  Carbon Dioxide Saving Per Year 
G (<70%) £310 1,200kg
F (70-74%) £205 810kg
E (74-78%) £155 610kg
D (78-82%) £105 430kg

Courtesy of Energy Saving Trust

Condensing combi boilers

As part of our range of gas condensing boilers, we offer a number of gas condensing combi boilers. Combining a high-efficiency water heater and a central heating boiler in a single compact unit, our condensing combi boilers are an ideal space-saving option for your property.


The MatriX gas burner

The MatriX gas burner represents a milestone in Viessmann heating technology. The use of the stainless steel MatriX gauze endows it with a long service life. The burner is resistant to high temperature loads.

Gas condensing boilers

With condensing technology, not only is the heat from the combustion of fuel oil or gas utilised, but also the heat that, with non-condensing heating technology, would otherwise escape unused up the chimney. Condensing boilers extract almost all of the heat latent in flue gases and convert it into additional heating energy. To do this, Viessmann condensing boilers are equipped with stainless steel Inox-Radial heat exchangers, which cool the flue gases before they are routed into the stack, to the extent that the water vapour contained within them is deliberately condensed, transferring the additional heat released into the heating system.