Do Gas Combi Boilers Use Electricity

Gas combi boilers, while primarily fueled by natural gas, do require a small amount of electricity to operate efficiently and safely. These boilers utilize various electrical components that are essential for their proper functioning, from ignition systems to control panels and automation features.

Components Requiring Electricity

Ignition System: The ignition system in a gas combi boiler is responsible for creating a spark to light the gas. This process requires a small amount of electrical energy, typically around 1-2 watts. Without electricity, the boiler would be unable to start and ignite the gas.
Central Heating Pump: The central heating pump is a crucial component that circulates the heated water from the boiler to the radiators and taps throughout the home. This pump typically consumes around 60 watts of electricity, which is less than the power required by a standard household kettle.
Boiler Fan: The boiler fan plays a vital role in extracting the flue gases outside the home, ensuring safe combustion. This fan requires electricity to operate, with a power consumption of approximately 20-30 watts.
Gas Valve: The gas valve is responsible for directing the flow of gas to the pilot light and burner. This valve is controlled by a motor that uses electricity, typically around 5-10 watts.
Display Screens: The display screens on gas combi boilers, which show information such as time, temperature, and fault codes, require a small amount of electricity, usually less than 5 watts.
Automation and Sensors: Gas combi boilers often incorporate advanced automation features, including temperature, pressure, and water level sensors. These sensors and the associated control systems require electricity to function, typically consuming less than 10 watts.

Electricity Consumption

On average, a gas combi boiler can consume between 100-200 watts of electricity per day, depending on the frequency of use and the specific model. This figure can be lower during warmer months when the central heating is used less often.

Impact on Energy Bills

While the electricity consumption of a gas combi boiler can contribute to higher energy bills, the amount is generally minimal compared to the overall energy costs associated with heating the home. However, it is important to consider the electricity usage, especially if the boiler is left on permanently, as this can lead to a more significant impact on the energy bill.

Comparison to Electric Combi Boilers

In contrast, electric combi boilers use electricity as their primary source of energy, rather than gas. These boilers are often more expensive to operate, particularly in areas where electricity prices are high. However, they can be a viable alternative for smaller homes or those with limited access to gas supplies.

Technical Specifications

Baxi Combi 105 HE Boiler: This gas combi boiler has a maximum power consumption of around 180 watts, which occurs when the pump and fan are running simultaneously.
Standard Central Heating Pump: Typically, a central heating pump used in gas combi boilers consumes approximately 60 watts of electricity.