With limited exceptions, all oil-fired boiler installations in the UK need to use a condensing type of boiler. This energy-efficient boiler comes in several varieties of drain options:
Oil boilers can still take different forms, according to the home's plumbing:
It is possible to have an oil boiler efficiency of up to 97% - that is, 97% of the oil's thermal energy is converted to heat. In the UK there is a scale rather unimaginatively called SEDBUK: Seasonal Efficiency of Domestic Boilers in the UK, and this defines ranges of boiler efficiency to help you narrow down your options easier. An A-rated boiler is 90% efficiency or greater.
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