Oil Combi Boilers


Looking for a simple, space-saving heating upgrade? Explore our wide selection of
energy-efficient oil combi boilers from leading boiler brands, supplied and installed
across the UK. From helping you choose the right boiler to completing a professional
installation, our experienced team supports you every step of the way.

Get a fully online quote today and take advantage of our team’s expertise.
We put our customers first and keep them informed through
every step of the installation.


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Oil Combi Boilers

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Our Range of Oil Combi Boilers

Oil combi boilers are an excellent choice for smaller and medium-sized homes looking for an efficient, quality, all-in-one heating solution. Because they heat water on demand, there’s no waiting for a hot water cylinder to reheat and no stored hot water losing heat over time. They’re particularly well suited to off-grid properties where mains gas isn’t available for a hot water system.

At Boilerhut, we provide professional oil combi boiler installation that delivers reliable heating and hot water all year round.

Navien LCB700 21kW Oil Combi Boiler
  • Price: £2,611
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 14 l/min
  • Heat Output: 2.1 - 21kW
  • Internal Boiler
Navien LCB700 21kW External Oil Combi Boiler
  • Price: £2,921
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 14 l/min
  • Heat Output: 2.1 - 21kW
  • External Boiler
Navien LCB700 28kW Oil Combi Boiler
  • Price: £2,914
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 18 l/min
  • Heat Output: 2.8 - 28kW
  • Internal Boiler
Navien LCB700 28kW External Oil Combi Boiler
  • Price: £3,255
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 18 l/min
  • Heat Output: 2.8 - 28kW
  • External Boiler
Navien LCB700 36kW Oil Combi Boiler
  • Price: £3,182
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 20 l/min
  • Heat Output: 3.6 - 36kW
  • Internal Boiler
Navien LCB700 36kW External Oil Combi Boiler
  • Price: £3,316
  • Efficiency: 93%
  • Warranty: 10 Years
  • Hot Water Flow: 20 l/min
  • Heat Output: 3.6 - 36kW
  • External Boiler

Energy Efficient Oil Combi Boilers

Modern oil combi boilers regularly achieve efficiency ratings of over 90%, helping you make the most of every litre of fuel. A higher efficiency rating means more of the fuel you burn is converted into usable heat, reducing waste and lowering running costs.

Heating oil has a high energy density, delivering substantial heat output without access to mains gas. While oil is generally considered a more expensive fuel type, in some areas, heating oil can be more cost-effective than electricity or mains gas, helping to reduce running costs. This is especially true in rural or off-grid properties where mains gas is unavailable and electricity tariffs are high.

System boiler min

Internal & External Oil Combi Boilers

Oil combi boilers operate as sealed systems, removing the need for separate cold water storage tanks in the loft. Heating oil is stored safely in an external tank, providing an independent fuel supply for your property.

  • External oil combi boilers help reduce indoor noise levels while freeing up valuable internal space.
  • Internal oil combi boilers make use of residual heat to provide additional warmth within utility rooms or similar spaces.

Our team can help you choose the most suitable option based on your property’s layout and your personal preferences.

Instant Hot Water Supply

These boilers heat water directly from the mains supply, delivering hot water on demand without storing it in a hot water cylinder or storage tank. This helps reduce heat loss and free up valuable space within your home. For households with modest hot water demand, a combi boiler offers a practical and efficient solution for both heating and everyday hot water.

Reliable & Compact Combi Oil Boiler Designs

Oil combi boilers are compact and provide dependable heating performance, making them a practical choice for smaller and medium-sized homes, as well as older properties not connected to mains gas.

Ready to upgrade to a new oil combi boiler? Get an online quote from Boilerhut and we’ll help you find the right oil combi boiler for your home. 

FAQs on our Oil Combi Boilers

Here are a few common questions regarding our oil combi products.

Depending on the model, our combi boilers can handle multiple bathrooms. However, hot water flow rates may be affected if multiple taps or showers are used simultaneously.

Yes. Oil combi boilers use proven technology that is familiar to many heating engineers, making servicing and maintenance straightforward.

Routine servicing typically includes inspecting the burner and heat exchanger, cleaning internal components, checking oil filters and fuel lines, testing safety controls, and ensuring the system is operating at the correct pressure. Regular maintenance can help improve efficiency, reduce the risk of unexpected breakdowns and extend the lifespan of your heating system.

As with any fuel source, oil prices can fluctuate over time, which may impact ongoing heating expenses. It’s important to consider your household needs and the current heating oil prices in the area. Get peace of mind by trusting in our expert team to advise you on the best boiler to order for your property.

Buy oil combi boilers in the UK and get a free Boilerhut remote survey via video call and pictures. 

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