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Viessmann Diesel Boiler

Diesel Condensing 

Although the majority of households with central heating rely on gas boilers for both heating and hot water, these solutions are not suitable for all homes. In particular, properties that are not connected to the gas grid or cannot get gas delivered will need to find an alternative solution.

Providing central heating and hot water, oil fired boilers work in a similar way to gas boilers - but as their name suggests, they rely on oil as the fuel supply. This is stored on site in an external storage tank.

Oil is a highly efficient fuel, meaning it gives a good return on every unit of energy used. Also, just like with gas boilers, oil central heating boilers are now available with condensing technology, which is designed to capture and re-use the heat in the flue gasses. This helps to make them much more efficient than traditional non-condensing designs. As a result, they can help you to save money on your energy bills and they are more environmentally friendly.

Oil Fired Condensing Technology

Viessmann 300-T


Floor-standing oil condensing boilers have long been characterised by extremely high operational reliability and long service life.

The stainless steel Inox-Radial heat exchangers fitted in our boilers extract almost all of the heat present in the flue gases, converting it into additional heating energy for you to use. 

This increases the efficiency of your heating system, bringing your bills down and reducing the impact on the environment.

With an output range from 35.4 to 53.7 kW, the Vitoladens 300-T covers a wide range of possible uses - from single and multi-family houses to smaller businesses.

Diesel Heating Storage Tank


Economical, space-saving and unproblematic storage of the fuel is also one aspect of the complete heating system. Roth heating oil tanks are designed for this purpose.

Roth heating oil tanks – a safe solution for all situations: in detached houses or multiple dwelling units, in apartment blocks or business premises, in new buildings, extensions or renovations.

Solutions with Oil

Oil boilers made by Viessmann are renown for having a very good efficiency due to the condensing mode the boiler operates in.

This increases the efficiency compared to a standard model of up to 15%.

A large water volume in the boiler itself allows a long heating process when in heating or domestic hot water mode.

This means less on/off functions that can lead to higher maintenance bills over time.

Applications where oil is used:

  • Heating water for central heating convectors and radiators

  • Floor and wall heating solutions

  • Domestic or commercial hot water provision

  • Pool and spa heating

  • Auxiliary heat for heat pumps and renewable energy systems

  • Commercial projects

  • Upgrading from existing boilers to oil condensing boilers. e.g. non-condensing oil boilers

  • HVAC systems 

Solutions that can be added:

  • Solar thermal system integrated for domestic hot water and/or heating/pool and spa heating

Easy to use programming:

  • Integrated WiFi connectivity to control your heating system remotely via your phone or ipad

  • Weather compensation - For boiler modulation which will adjust the heat output as the outside temperature changes, leading to energy savings of 15%

  • Smart, clear programmer for heating time programme control, room temperatures, heating circuit control and other settings


Contact us at Red Dwarf for professional advice and knowledge that will help you choose the right energy source for your system

Viessmann Diesel Boiler System


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