mostly rural homes where natural gas is not available
https://www.crownoil.co.uk/guides/heating-oil-guide/What are the different types of heating oil?
Kerosene: is sometimes known as 28-second oil or home heating oil. Kerosene is primarily used for home heating and is considerably lighter than gas oil. The standard grade of kerosene means it meets BS 2869 Grade C2 specifications (more simply it can be called C2 kerosene).
Premium Kerosene: this is a higher grade of domestic oil than standard kerosene as it’s lighter, as well as having other benefits. It meets BS 2869 C1 specifications and is often call C1 kerosene.
Kleenburn Kerosene: this type of heating oil is a lot cleaner when burning which is less polluting than normal kerosene. Kleenburn kerosene is slightly higher in price, however; it’s a lot safer for the environment and helps keep emissions low, which is especially helpful for companies.
Furnace Fuel: furnace fuel is usually required in municipal buildings like schools and colleges. It’s fully compliant to BS EN 2869, Class D parameters, which is the British Approved Standard for heating oil. It can be used in all commercial boilers.