Types of Heating Oil in the UK: A Guide for Homeowners and Businesses

Heating oil is a key fuel source in the UK, particularly for households and businesses in rural areas where mains gas isnt available. It powers oil-fired boilers and heaters to provide warmth and hot water, making it essential during the colder months. However, not all heating oils are the same. Understanding the different types of heating oil available in the UK can help you choose the right fuel for your heating system, manage costs, and consider environmental impact.

What Is Heating Oil?

Heating oil is a refined petroleum product used as fuel in heating systems. It is stored in tanks on-site and burned in boilers or furnaces to generate heat. In the UK, heating oil is especially popular outside urban centres, where gas infrastructure is limited.

Main Types of Heating Oil in the UK

There are two main types of heating oil used across the UK: Kerosene (28-second oil) and Gas Oil (35-second oil or red diesel). Each has distinct characteristics in terms of viscosity, taxation, and usage.

1. Kerosene (28-Second Oil)

Kerosene is the most common heating oil for domestic properties in the UK. It is often referred to as 28-second oil because it flows through a standardized test nozzle in about 28 seconds at 20C, indicating its viscosity.

• Usage: Kerosene is designed for domestic heating systems, especially oil-fired boilers in homes.

• Advantages: It burns relatively cleanly, producing fewer emissions and less soot compared to heavier oils. This makes it safer for indoor heating.

• Cost: Generally, kerosene is more expensive than gas oil because it carries a higher tax rate.

• Environmental Considerations: While still a fossil fuel, kerosene tends to produce fewer particulates, reducing the impact on indoor air quality.

2. Gas Oil (35-Second Oil or Red Diesel)

Gas oil, commonly known as red diesel due to the red dye added for tax purposes, is a heavier, less refined fuel than kerosene. It is thicker and flows more slowly roughly 35 seconds in the same viscosity test.

• Usage: Gas oil is primarily used in commercial and agricultural settings, such as heating large buildings, powering farm equipment, or industrial boilers.

• Advantages: It is cheaper than kerosene due to lower fuel duty but is not generally approved for domestic heating use because of taxation and regulatory rules.

• Cost: Gas oil offers cost savings where its use is permitted.

• Environmental Considerations: This fuel produces more soot and particulates, which can impact appliance efficiency and air quality.

Emerging Trends: Bioheating Oil and Renewable Alternatives

With growing environmental concerns, bioheating oil is gaining popularity in the UK. This fuel is a blend of traditional heating oil with renewable biofuels derived from vegetable oils or animal fats.

• Benefits: Bioheating oil reduces carbon emissions and can often be used in existing boilers without modification.

• Availability: Many suppliers now offer blends with up to 30% biofuel content, helping users lower their carbon footprint.

Safety and Regulatory Notes

It is important for heating oil users to follow regulations. Kerosene is the only type officially approved for domestic heating in most cases. Gas oil use is restricted to specific commercial and agricultural applications. Additionally, heating oil must be stored in approved tanks, and regular maintenance of boilers is essential for safety and efficiency.

Conclusion

In the UK, kerosene remains the dominant heating oil for homes due to its clean-burning properties and regulatory approval. Gas oil, while cheaper, is mostly reserved for commercial and agricultural use. As environmental concerns grow, bioheating oil offers a promising greener alternative compatible with existing systems. Understanding these options allows consumers to choose heating oil that meets their needs while balancing cost and environmental impact.