Difference Between Gas and Electric Central Heating Systems

Difference Between Gas and Electric Central Heating Systems

Keeping your home warm during the chilly winter months is essential, and understanding the type of heating system you have is crucial for its care and maintenance.

While you don’t need to be an expert in heating systems, differentiating between gas and electric systems will help you stay warm. In this article, we’ll guide you through determining whether your heating system is gas or electric, empowering you to make informed decisions about its upkeep and functionality.

Identifying Gas Central Heating System

Gas central heating systems are prevalent in homes across the UK. Here are some key features that indicate you have a gas heating system:


A gas-fired boiler is typically housed in a white metal casing, and the boiler is responsible for providing hot water to your radiators and taps. In most modern setups, you’ll find combination (combi) boilers offering instant hot water.

Water Storage Tanks

Gas central heating systems with combi boilers usually do not require water tanks. However, if your home has a conventional gas-fired boiler, you might have a hot water cylinder enclosed in an airing cupboard along with a cold-water tank in the loft. These conventional boilers are still found in large homes.

Radiators with Valves

While electric heaters can resemble traditional radiators, gas central heating systems usually feature radiators with valves. These valves regulate the water flow into and out of the radiator, and you may notice a thermostatic valve with a numbered dial that allows temperature control.


Gas central heating systems utilise a network of pipes to transport water between the boiler and radiators. Although pipes are usually hidden behind walls or under floorboards, you can identify them by observing pipes emerging from the floor or walls and connecting to the sides of your radiator.

Electric Heating System

You likely have an electric heating system if you don’t find the components mentioned above in your heating setup. Here are some indicators of an electric system:

Wall-Mounted Panel Heaters

Electric systems often feature white panel heaters with dials, digital displays, and physical On/Off switches. These heaters are directly connected to the mains electricity supply, and the built-in electric element converts electricity into heat.


Electric radiators are typically connected to the mains electricity supply. You may observe a wire that is attached to a conventional 3-pin plug or inserted into a white, square electrical spur mounted on the wall.

Shower Switch or Pull Cord

In your bathroom, an electric heating system can be identified by a pull cord or switch with a red light that comes on when activated. This switch allows you to isolate the power supply to the electric shower. Electric showers are also present in homes with gas central heating, especially when additional bathrooms or ensuites exist.

Pros and Cons of Gas Central Heating

Pros and Cons of Gas Central Heating

Gas central heating systems offer certain advantages and disadvantages. Let’s explore them:


Quick to Reach Temperature: Hot water-filled radiators in gas central heating systems heat your home rapidly, providing comfort during the coldest winter months.

Easy to Repair: Gas-fired boiler central heating systems are widespread, meaning many professionals are experienced in repairing and maintaining them. Replacing a boiler or radiator is usually straightforward, as the necessary components are readily available.

Low Ongoing Costs: Gas is a cheaper energy source compared to electricity. With the advancement of modern combination boilers, their efficiency can exceed 90%, thereby diminishing any previous advantages electric heating systems may have held.


High Initial Costs: Installing a full gas central heating system can be expensive, including purchasing boilers, multiple radiators, and copper piping. The installation process can be disruptive, especially in properties with no central heating.

Annual Maintenance: Gas boilers and their components require timely maintenance from a registered gas engineer annually. While this ensures proper functioning, safety, and early detection of issues such as carbon monoxide leaks, it adds to the annual maintenance expenses and requires scheduling.

Environmental Impact: Gas central heating systems rely on the burning of natural gas, which releases

greenhouse gases. These harmful gases contribute to global warming and climate change.

Safety Concerns: Gas central heating systems require the combustion of gas to generate heat. This combustion process poses certain safety risks, such as the potential for gas leaks, carbon monoxide poisoning, or even explosions if there are faults or malfunctions in the system.

Pros and Cons of Electric Heating

Pros and Cons of Electric Heating


Easy to Install: Electric radiators only need to be connected to the mains electricity supply, making installation hassle-free. There’s no need for extensive work like laying pipes or disrupting walls and floors. This is particularly beneficial if your property is not connected to the gas network.

Low Initial Cost: Electric heating systems have a lower initial financial outlay than gas systems. While you’ll need to cover the cost of electric radiators or towel rails and the labour of a qualified electrician, you won’t require expensive boilers, heat pumps, or copper pipe networks.

Easy to Maintain: Electric heating systems require minimal maintenance once the installation is complete. With fewer components to go wrong, checks there’s no need for annual system like those needed for gas-powered systems.


Slower to Reach Temperature: Despite operating at near 100% efficiency, electric heating systems may take longer to warm up a room compared to gas-powered systems. It can be compared to the difference in cooking times between electric hobs and gas rings.

Higher Ongoing Costs: The cost of electricity per unit is generally higher than gas. Additionally, electric radiators may take longer to heat up, resulting in higher monthly energy expenses. The increased usage of a higher-priced energy source contributes to the ongoing cost difference between electric and gas heating systems.


Knowing whether your heating system is gas or electric is essential for proper care and maintenance. By identifying the key features of each type of system, such as boilers, radiators, and pipework, you decide wisely about how to keep your home warm and efficient. Gas central heating systems offer quick heating, easy repairs, and lower ongoing costs but have higher initial expenses and annual maintenance requirements.

On the other hand, electric heating systems are easy to install, have lower initial costs, and require minimal maintenance but may take longer to reach desired temperatures and result in higher ongoing energy expenses. Understanding the pros and cons of each system empowers you to choose the best option for your needs and budget.

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