Oil Boilers

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High Efficiency Condensing Oil Boilers

In a Conventional Boiler, fuel is burned and the hot gases produced are passed through a heat exchanger where much of their heat is transferred to the water in your heating system, thus raising the water’s temperature.

In a regularly serviced conventional boiler, flue temperatures are approx 200°C, whilst unserviced boilers have flue temperatures in the range of 300°C and can even be as high as 400°C. These high flue temperatures are a direct indication of the oil being burned and wasted out through the flue and into the atmosphere.

It is extremely important to ensure your boiler is regularly serviced by an OFTEC Engineer and to ensure that is serviced in the correct manner. See Boiler Service for details.

A High Efficiency Condensing Boiler utilizes the latent heat of water produced from the burning of fuel, in addition to the standard sensible heat, to increase its efficiency. Flue temperatures in condensing boilers are typically in the region of 80°C and can be as low as 45°C. This means that this considerable temperature difference is not being lost into the atmosphere, but re-directed into the heating system, making it considerably more efficient.

Paragon Oil Boilers

How it works

One of the hot gases produced in the combustion process is water vapour (steam), which arises from burning the hydrogen content of the fuel. A condensing boiler extracts additional heat from the waste gases by condensing this water vapour to liquid water, thus recovering its latent heat.

The condensate produced is slightly acidic, 3 - 5pH, so the choice materials used in the wetted areas must be suitable. At high temperature, most commonly used are aluminium, alloys and stainless steel, and at low temperatures, plastics are most cost effective, such as uPVC and polypropylene. The production of condensate also requires the installation of a heat exchanger condensate drainage system.

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