Can you get a fully electric combi boiler?
Can you get a fully electric combi boiler in the UK and Ireland? Yes, you can get a fully electric combi boiler, but to get a useable amount of domestic hot water, you need a 15 kW model (this is the largest unit that can be run on a single-phase 240-volt supply) or above output model (larger than 15 kW output will require a three-phase 415-volt electrical supply). In UK terms, the unit is an electric boiler that can provide both central heating and domestic hot water from one appliance, without using gas, oil, LPG or a flue.
A fully electric combi boiler normally works by using electric heating elements to heat water for the wet central heating system, such as radiators or underfloor heating. It can also provide hot water for taps and showers instantaneously.
Our full range of these electric combination boilers are detailed here – Electric combi boilers
The main benefit is that it is a clean and simple option at the point of use. There is no gas supply required, no oil tank, no flue, no combustion process and no risk of fumes from the appliance. This can make electric combi boilers useful for flats, small homes, extensions, offices, workshops and properties where gas or oil is not available.
However, there are important limitations. Domestic hot water performance is usually lower than a gas combi-boiler’s because electricity has practical power limits in many UK properties. A small electric combi may be suitable for a basin, kitchen sink or single shower, but it may struggle with high hot water demand, multiple bathrooms or frequent baths.
The electrical supply also needs to be checked carefully. Larger electric combi boilers can require a high electrical load and need a three-phase power supply. Running costs can also be higher than gas because electricity is usually pricier per kWh.
In simple terms, fully electric combi boilers are available, but they are best suited to smaller or well-insulated properties with modest hot water demand. An electric system boiler with an unvented cylinder may be a better option for larger homes or those with high hot water usage.
