Oil Boilers

An oil boiler works in a very similar way to a gas boiler. They comprise of several key components that include a pressure jet burner, a combustion chamber, a water jacket containing both a primary and secondary condensing heat exchanger and a flue system to safely remove the unwanted combustion gases that are produced by the boiler. Oil boilers also need their own fuel supply which will require an oil tank to be installed at the property. Oil boilers generally use kerosene as their primary fuel source but with an ever increasing demand for more sustainable home heating the introduction of biofuels such as HVO is well underway. The fuel used is ignited within the combustion chamber by the pressure jet burner. As the hot combustion gasses rise up through the heat exchangers, they heat the surrounding water within the boiler, and the heated water is then used to heat both the emitters, such as radiators and underfloor heating, and the domestic hot water within the property. Once the combustion gases have passed through the boiler they will enter and pass through the flue system and disperse safely outside of the property.

Oil boilers are categorised as either heat-only boilers, which provide heat into both the space heating and domestic hot water system and require a cylinder to supply the hot water to the property. Or a combination boiler (combi) which provides both heating and hot water direct from the appliance and do not require an additional cylinder. Both are usually available as both internal and external models.

Grant Vortex boilers are condensing oil-fired boilers – please click here to read more about how condensing boiler technology works.

A condensing boiler has second (condensing) heat exchanger where the flue gases are cooled to below their dew point by the water returning from the heating system. This has the effect of condensing the water vapour present in the flue gases, and liberating the heat energy that would otherwise be lost to outside through the flue system.

A combi, or combination boiler as it is also known, produces both heating and hot water from one compact appliance, removing the need for a separate hot water cylinder. Combi boilers are a popular choice for small-medium sized homes where space is at a premium.

The size of oil boiler that you will need will be determined by the heat loss of your property, the size of your home and your requirements for heating and hot water demand.

Grant outdoor oil boilers share the same space heating efficiency as their indoor model equivalent.  System efficiency with an outdoor boiler can depend on the installation and whether there are any large heat losses to the external air via the boiler or pipework. All external pipes must be well insulated to protect from heat loss.

Choosing the best boiler for your home is important so that it meets all of your requirements. Whether you need an internal or external boiler, one for your utility room or garage, your installer will help you find the best boiler type for your property and with thirty-four models available, a Grant boiler should meet your requirements.