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Can a Combi Boiler Run on Oil

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  • 25-11-2020
Can a Combi Boiler Run on Oil

Oil Combi boilers can handle both your central heating and hot water requirements, making them one of the most popular kinds of boilers in the UK. They are also a great size, meaning they can be used for both smaller and larger properties and installation is easier. They can heat cold water instantly, making them highly efficient and reliable and you don't have to wait around for your hot water. 

Due to the fact the water is instantly heated, this boiler doesn't require any storage space to store the water. This is why Oil Combi boilers are perfect for so many different purposes. Oil Combi boilers also are very economical, and have additional features that make the boiler so great; for example, a flow regulator to control the amount of water flowing through the system, and avoid the risk of an excessive amount being wasted. 

What is an Oil Boiler?

Oil boilers come in two different types; a combi boiler, which combines both central heating and hot water into one and a heat-only boiler which purely provides our central heating. To work an oil boiler, you need to have the oil delivered to you by a supplier which can either be done as and when you need it, or by a seasonal contract. 

Oil boilers are one of the most efficient out of them all and provide a good energy efficiency rating to meet your building regulations. They should be serviced every 12 months to ensure they are working safely and efficiently, and also to avoid the risk of carbon monoxide leaking. If you maintain your oil boiler as you should and have it regularly serviced, they can last up to 20 years. 

What is an Oil Boiler? Carlisle and Cumbria Boiler Replacement

How Does an Oil Boiler Work?

Oil Combi boilers work by heating up hot water as soon as it's turned on. This is great for showering and baths as you aren't wasting water waiting for it to heat up; which is, therefore, more eco-friendly. This also means there is no requirement to store water, which means this boiler can be used for both smaller and larger properties. 

The way this boiler works is so efficient as it uses modern features such as a flow regulator, a pressure jet burner and an ultra-compact heat exchanger. The water that is heated travels to the radiators to be used for central heating as well as through your taps and showers. This process helps avoid the risk of using up an excessive amount of water, and it also means the water itself is fresh as it hasn't been in the storage tank like it does with other types of boilers.

Types of Oil Boiler

There are three main types of oil boilers that are all ideal for different purposes. They are all very efficient boilers; however, the one that is best for you will be due to factors including space, purposes, usage and affordability. Here is some more information about each of the three oil boilers to give you a better understanding:

Regular Boiler 

The regular boiler requires adequate storage space and has a hot water tank separately from the boiler, which is attached to a source producing cold water. It has modern and updated features and works efficiently.

Combi Boiler 

This provides central heating and hot water and doesn't require hardly any storage space, so it's great for small and large properties. The water is heated as soon as the tap is turned on, meaning they are more affordable. 

System Boiler 

The system boiler provides an easy installation process and works similar to the regular boiler. This boiler also doesn't require extra storage space for cold water, as it's pretty much on demand too. 

Combi, System or Regular Oil Boiler?

Whether you choose a combi boiler, a system boiler or a regular boiler will depend on your specific circumstances. All three of these oil boilers work efficiently and can last around 20 years, providing they are well maintained and regularly serviced. You must take specific factors into consideration when choosing which boiler is better for you; for example, storage space, affordability, purposes and much more. If you are unsure which boiler would be best for you, please don't hesitate to get in touch with a professional. 

Pros and Cons of Oil Fired Combi Boilers


  • You don't have to wait around for hot water, as it comes straight out when the tap is turned on; this saves water and also makes these oil boilers more affordable. 
    Oil Fired Combi Boilers are very efficient 
    Easy, quick and cheaper installation 


  • Due to the fact that these boilers cover both your central heating and your hot water needs, if your boiler breaks down, you are left without either of these heat sources.
    If you have the hot shower on, and also the hot tap in the kitchen, there will be low water pressure. 

Are you considering installing an oil-fired boiler in your home or business? We hope that this article has helped you understand: Can a Combi Boiler Run on Oil?

If you require oil boiler installation, repair or servicing in the Carlisle and Cumbria area, contact your local oil boiler specialist.