Are you searching for the best oil boilers in 2024? Then look no further, as in this article, we’ll talk you through some of the top contenders of home heating in the UK, so you can find the best oil boiler for keeping your home warm and cosy.
We’ve scoured the market and evaluated multiple oil boilers based on their features, efficiency, and reliability. What’s more, we’ve compiled a list of the top 3 best oil boilers for conventional boilers, combi boilers and system boilers, so you’re sure to find something suitable for your home’s heating needs.
By the end of this article, you’ll feel more confident in making an informed decision on which is the best oil boiler model for your home.
Find the best oil boiler for your home
Oil boilers are a great choice for anyone whose home is not on the gas grid. However, if your property is connected to the gas grid, we would not advise replacing a gas boiler with an oil boiler.
Don't have time to compare oil boilers? Get free expert advice from an OFTEC registered heating engineer.
We can get you free quotes from up to 3 boiler installers near you, so you can compare prices and avoid overpaying. It's completely free of charge and there's no obligation to accept any of the quotes you receive. Click the button below to get started and don’t settle for anything less than the best oil boiler model for your home.
To find the top 3 oil boilers for each boiler type, we have taken the following into consideration:
Boiler efficiency
Length of warranty
Key features
Cost of boiler
You can find the results of our research below.
Top 3 best regular oil boilers
These oil boilers work alongside a separate hot water cylinder and a cold water and a feed and expansion tank to create a central heating system for your home. To ensure your installation costs are not too expensive, we would only recommend replacing an existing regular boiler with a new regular boiler. Otherwise you will be paying a lot of money to get extra pipework and external components.
Worcester Bosch Greenstar Danesmoor
Price range (excluding installation): £1,430 – £2,235
Output range: 18kW – 32kW
The Worcester Bosch Greenstar Danesmoor is available in a number of different output sizes to suit different homes. But first, it is important to know what boiler sizing your home needs, as you don't want to waste money and time installing the wrong size of boiler. There are also 3 different model types available, meaning you can find one suitable to your preferences and needs.
Key features:
Efficiency ratings of 90%+
Comes with up to 7 year guarantee (when meeting certain terms and conditions)
Price range (excluding installation): £2,100 – £2,605
Output range: 21kW – 36kW
Available in both internal and external models, the Grant Vortex Blue oil boiler can be installed in a kitchen, utility room, or outside of your home. It has a blue flame burner which makes it efficient and reliable, and helps to greatly reduce toxic nitrogen oxide (NOx) emissions.
Key features:
All models come with a 10-year guarantee (when installed by a Grant G1 Installer)
Price range (excluding installation): £1,920 – £2,800
Output range: 20kW – 41kW
Designed specifically to fit beneath a kitchen worktop, the Mistral Kitchen Utility Classic oil boiler is extremely quiet in operation, and easy to service, due to its detachable front casing. This boiler has pre-punched pipe entry points on both the sides and the back which allow for quick and easy installation.
If you’re looking for a new oil boiler, but aren’t sure which type or model would best suit your home, we’re here to help! Our friendly team can put you in touch with professional engineers in your area who can give you the best advice and competitive quotes – best of all, it’s completely free! and there’s no obligation to use any of the quotes provided. So why not get in touch now and find your new oil boiler – simply click the button below to get started.
These oil boilers work alongside a separate hot water cylinder to provide heating and domestic hot water to your home. They are ideal for replacing an old regular boiler, or a combi boiler that could not meet the domestic hot water needs of the property.
Worcester Bosch Greenstar Danesmoor
Price range (excluding installation): £1,738 – £2,657
Output range: 18kW – 32kW
As well as being an excellent regular boiler, the Greenstar Danesmoor is also a great oil system boiler too. The system boiler range also includes 3 model types suited to different preferences and needs.
Key features:
Efficiency ratings of 90%+
Comes with up to 7 year guarantee (when meeting certain terms and conditions)
Price range (excluding installation): £1,560 – £2,550
Output range: 20kW – 44kW
The Firebird Envirogreen system oil boiler has a compact design which makes it ideal for installing beneath a kitchen worktop, and is also available in 2 different outdoor models. Its fully insulated acoustic design ensures that the boiler operates quietly.
Key features:
Hard wearing, premium quality casings
High performance low NOx Elco burner
Efficiency ratings of 92.5% – 93.8%
Compatible with hydrotreated vegetable oil (HVO) fuel
Price range (excluding installation): £1,500 – £2,000
Output range: 21kW – 33kW
The Warmflow Agentis oil system boiler is available in external and internal models. They are some of the most efficient oil boilers on the market, with one model being AA-rated for efficiency.
If an oil system boiler seems like the perfect fit for your home, but you’re unsure how to find the best installer, we can help!
By clicking the button below we can connect you with up to 3 professional heating engineers in your area who can provide you with FREE, no-obligation quotes. They can advise on the best make and model for your home and offer the most competitive prices. It’s simple, free and no-risk! So what are you waiting for?
Oil combi boilers provide heating and hot running water in one compact unit. There is no need for any feed tanks in the loft or a separate hot water cylinder, as combi boilers heat the water directly from the mains supply.
Worcester Bosch Greenstar Heatslave II
Price range (excluding installation): £2,350 – £2,772
Output range: 18kW – 32kW
Dubbed 'The UK's most popular oil combi boiler', the Greenstar Heatslave II fits comfortably under a kitchen unit, and is available in an external model too. It has a smart modern design with its controls hidden in a drawer, and is available in a range of models for different property sizes.
Price range (excluding installation): £2,175 – £2,985
Output range: 21kW – 36kW
The Grant Vortex Pro oil combi boiler is available in internal and external models, and also includes an extra slim option for anyone that is tight on space. Its large heat exchangers help to increase its hot water performance.
Key features:
Efficiency ratings of 89.5% – 94.5%
5 year guarantee when installed by a Grant G1 Installer
Price range (excluding installation): £2,150 – £2,600
Output range: 20kW – 35kW
This oil combi boiler from Firebird is available in external and internal models, and includes a rapid re-heat function to allow for quicker hot water on demand. All boiler models in the Firebird Envirogreen HE range are highly efficient, reaching efficiency ratings of 93%. This makes Firebird boilers one of the most efficient oil boilers on the market.
Key features:
Efficiency ratings of 93% across the entire range
Fully insulated and designed for ultra quiet operation
If you would like free, no-obligation quotes for an oil combi boiler, but you can’t stand the hassle of searching the web for reliable installers, then look no further!
By clicking the button below we can connect you with up to 3 qualified heating engineers, who can offer you competitive quotes for you to compare. It’s completely free and there’s no obligation to accept any of the quotes on offer – give it a try!
When it comes to choosing between an internal or external oil boiler for your home, there are 2 main factors you need to consider: The difference in price between internal and external boilers, and how much space is available within your home.
External oil boilers are generally more expensive than their internal counterparts and will most likely cost more to install too. However, if you have limited space available inside your home, investing a bit more money in an external boiler could be the ideal solution.
Whether an external or internal oil boiler will be best for you, will depend entirely on your own specific needs and circumstances.
Best oil boiler for a large house
The best boiler for a large house will most likely be one of the system oil boilers we have mentioned, as they can provide ample hot running water to a property without taking up too much internal space.
Which of the 3 system boilers we have mentioned will be the best oil boiler for you, however, will depend on what you consider to be most important. To ensure you get the right oil boiler that suits your specific needs and circumstances, we recommend getting advice from an OFTEC registered heating engineer.
To ensure that you don't overpay, we'd also recommend getting quotes from several heating engineers near you.
Best oil boiler for a small house
Smaller houses are best suited to combi boilers, as they take up much less space than system and regular boilers, and are capable of providing sufficient heat and hot running water to a smaller property with ease.
Whether an internal or external combi oil boiler will be best for you will depend entirely on your home and how much room you have. Each of the 3 best oil combi boiler models we have mentioned previously has its own features and benefits that may be more suited to different specific needs too.
To ensure you get the right combi oil boiler for your home, we recommend getting expert advice from an OFTEC registered heating engineer, and to ensure that you don't pay too much, we'd also recommend getting quotes from several heating engineers in your area. This is something we can help with.
Simply click the button below, and we'll find you free comparison quotes from up to 3 local OFTEC registered heating engineers. It's completely free and you don't have to accept any of the quotes you receive.
What is the most efficient oil boiler on the market?
All of the oil boilers we have listed in this article are highly efficient. However, when it comes to the efficiency of a boiler, it’s clear that Grant’s oil boilers are hard to beat. With efficiency ratings as high as 94.5%, Grant's oil fired boilers rival the efficiency levels provided by many modern gas condensing boilers on the market.
Oil boiler efficiency
In general, oil boiler efficiency ranges from 89% to 94% on new condensing models. This is similar to new condensing gas boilers which have an efficiency of 90% to 94%.
On the other hand, non condensing oil boilers have an efficiency of 85%. After about 10-15 years, oil boilers lose their efficiency down to 60-70%.
Which oil boiler brand is the most reliable?
While there is no guarantee that the boiler you have will be more reliable because of what brand it is. There are some things you can take into consideration when choosing a boiler brand. This includes looking for manufacturers that offer sufficient boiler warranties and have good reviews.
Boiler warranties
A good way to judge how much faith a manufacturer has in their products is by checking how long the warranties they place on them are. The longer the warranty, the more reliable the product is likely to be. This applies to boilers too.
Boiler brands that provide longer warranties tend to also provide more reliable boilers. Warranty length is a very effective way to judge boiler reliability. Of the boiler brands mentioned in this article, Worcester Bosch provides the longest warranties on their oil boilers, with a length of 7 years (when meeting certain terms and conditions).
Brand reviews
Checking a brand's reviews is an excellent way to determine how reliable their products are. Reading what genuine customers have to say about their experience with a brand is one of the most accurate ways to determine how reliable their boilers are.
This allows you to see both the good and bad experiences customers have had with each brand, and can alert you to any common problems a brand's customers may frequently experience.
Of the boiler brands mentioned in this article, Worcester Bosch has marginally better reviews than the others with a TrustPilot score of 4.6 out of 5. Narrowly beating Warmflow on 4.2 and Grant on 4.1.
FAQ
What is the most efficient oil boiler?
The most efficient oil boilers is the Grant Vortex Blue. This boiler range has efficiency ratings of up to 94.5%!
What will replace oil boilers after 2025?
The oil boiler ban has been pushed back to 2035, so you will not need to replace your oil boiler after 2025. If you are interested in a renewable heating system for your home, you can consider installing a heat pump.
