Electric Boilers UK: Are They Worth It? 2026 Guide
Electric boilers heat water using electric elements rather than burning gas or oil. They can be compact, quiet, and simpler to install in some properties, but running costs can be higher than gas depending on your tariff and heat demand. This guide explains how electric boilers work, when they make sense in the UK in 2026, and what to consider before choosing one.
How Electric Boilers Work
Electric boilers use electrical resistance to heat water for central heating (and sometimes hot water via a cylinder). They don’t need a flue and don’t produce combustion gases, but they still need correct sizing and controls.
Running Costs vs Gas
Running costs depend heavily on electricity prices. While electric boilers can be very efficient at converting electricity into heat, the unit price of electricity can make them costly for high heat-demand homes.
When an Electric Boiler Can Make Sense
- Small, well-insulated properties with lower heat demand
- Homes without a gas connection
- Situations where flue/combustion constraints make gas difficult
- Properties considering solar + suitable tariffs (case-by-case)
Alternatives to Consider
Depending on your home, alternatives could include a heat pump, LPG/oil (where available), or improving insulation and controls first to reduce heat demand.
Start With the Right Heat Output
Correct sizing matters for all heating options. Use our calculator to estimate the kW output range your home needs before choosing a system.
Use the Boiler Size CalculatorFrequently Asked Questions
Are electric boilers expensive to run?
They can be, especially in larger or poorly insulated homes. Costs depend on electricity tariffs and heat demand.
Do electric boilers need a flue?
No. They don’t burn fuel, so there are no combustion gases to vent.
Can an electric boiler run radiators?
Yes, if it’s correctly sized and connected to a wet heating system. Performance depends on heat demand and radiator sizing.
Is an electric boiler the same as a heat pump?
No. Heat pumps move heat and can deliver multiple units of heat per unit of electricity, while electric boilers convert electricity directly into heat.
When is an electric boiler a good option?
Often in smaller, well-insulated properties or where gas isn’t available and a heat pump isn’t suitable for practical reasons.