Find out how much an oil combi boiler costs here.
How much does an Oil Combi Boiler cost?
Average cost in UK: £1500
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The average cost for an Oil Combi Boiler is £1500. You are likely to spend between £1350 and £2300 total. Exact price may vary depending on your area and project details.
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Oil-fired combi boilers are a great alternative for those living out in the country, cut off from local gas and electricity supplies. As an alternative to traditional gas heating, oil combi boilers basically allow you to keep fuel stored near your home and top-up the unit as and when you need. Combi boilers are, however, usually recommended for smaller homes or flats, so if you live in a particularly large country home you may find a traditional central heating system more suited to your living arrangements.

Price Summary for oil-fired combi boilers:

Price range = £1,350 to £2,300

Average cost = £1,500

Best/cheapest price = £1,350

We asked a number of different retailers and manufacturers to quote the cost of their standard oil-fired combi boiler units, and they provided us with the following figures:

  • Eurocal - £1,350 to £1,900
  • Warmflow -  £1,700 to £1,950
  • Grant Vortex -  £1,800 to £2,000
  • Firebird - £1,850 to £2,150
  • Worcester Greenstar - £2,000 to £2,300

You’ll need a regular supply of oil delivered to your property to keep your combi boiler running smoothly. The average amount of oil you’ll need is between 600 and 1750 litres per year, depending on the size of your home. Oil can be bought as either a standalone purchase (costing anywhere between £220 and £280 for 500 litres), or else as part of an annual service programme (which includes extra replenishment and possibly repair maintenance).

We asked three of the major energy service providers how much an annual service programme for an oil combi boiler costs and they came back with the following information:

  • British Gas - £7 to £10.50 per month
  • Worcester Bosch - £12 to £15 per month, including up to £1,500 breakdown protection
  • Plumbcare - £18 to £25 per month, including potential replacement boiler (up to the value of £2000) and free oil safety storage tank

You can generally conserve oil by resetting the temperature controls on your combi model according to different times of the day – so it only uses more fuel when you and your family are actually about to make the most of the increased heat. Nevertheless, make sure you have somewhere to store additional fuel before purchasing an oil combi boiler and don’t forget to include annual fuel costs in your final budget.

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