Types of Heating Oil in the UK: A Complete Guide

Heating oil is a crucial energy source for many homes and businesses across the UK, particularly in rural areas that are not connected to the mains gas grid. Understanding the different types of heating oil available can help consumers make informed decisions regarding cost, efficiency, and environmental impact. In the UK, the two primary types of heating oil are kerosene and gas oil, though there are also bio-based alternatives emerging in the market.

1. Kerosene (Standard Heating Oil)

Kerosene, also known as 28-second oil or home heating oil, is the most common type used in domestic heating systems across the UK. It is a clear, thin, and highly refined oil that burns cleanly and efficiently.

Key features:

• Used primarily in domestic oil-fired boilers and cookers.

• Suitable for internal and external oil boilers.

• Lower viscosity, which makes it efficient for burning.

• Produces less carbon build-up, reducing maintenance needs.

Due to its widespread use and efficiency, kerosene is often more cost-effective in the long run, especially when purchased in bulk. It is also compatible with most modern heating systems, making it the preferred choice for homeowners.

2. Gas Oil (Red Diesel)

Gas oil, also known as 35-second oil or red diesel, is a heavier and less refined oil. It is dyed red to distinguish it from standard diesel and is taxed differently due to its use in off-road vehicles and machinery.

Key features:

• Commonly used in agricultural, commercial, and industrial settings.

• Not typically used for domestic heating unless in older systems.

• Cheaper per litre than white diesel but not as efficient as kerosene for home heating.

Gas oil is primarily used in commercial boilers or in older domestic heating systems that are still compatible. It's important to check whether your system can handle this heavier oil, as it may lead to soot build-up and require more maintenance.

3. Premium Kerosene

Some suppliers offer premium kerosene, which includes additives to improve efficiency, reduce carbon deposits, and prolong boiler life.

Benefits include:

• Better combustion, leading to improved energy efficiency.

• Reduced sludge and deposit formation.

• Extended lifespan for heating appliances.

Although more expensive than standard kerosene, premium kerosene can result in savings on maintenance and repair costs over time.

4. Bio Heating Oil

As the UK transitions toward greener energy, bio heating oil options are beginning to appear. These oils are made from renewable sources such as vegetable oils or animal fats, often blended with traditional kerosene.

Advantages:

• Lower carbon emissions.

• Renewable and more sustainable.

• Supports the UKs Net Zero goals.

Bio heating oil is still an emerging market and may not yet be widely available or compatible with all existing heating systems. However, it represents a promising option for the future.

Conclusion

Choosing the right heating oil depends on your system, budget, and environmental priorities. Kerosene remains the standard choice for most UK homes, while gas oil is better suited for industrial use. For those seeking improved performance, premium kerosene is a worthwhile upgrade, and bio heating oil presents a greener alternative for the future. Always consult with your supplier or heating engineer to ensure compatibility with your system.