Different types of radiators explained 

The four different types of radiator heating 

Radiators can be powered by a variety of heating sources, each suited to different needs and preferences. Finding the right heating type can make all the difference in how efficiently and comfortably your home stays warm.

Electric radiators 

An electric radiator is a heater that uses electricity to warm indoor spaces. It converts electrical energy into heat; either by warming up metal plates or by heating oil or fluid inside a sealed unit.

There are two main types of electric radiators: convection and oil-filled. Convection radiators heat air directly, which rises and spreads warmth throughout the room. Oil-filled radiators heat oil that circulates within the unit, which provides a slow, steady release of warmth.

Electric radiators are easy to use and efficient. Many come with thermostats and timers for precise control. Some can even be controlled via smartphone apps. They’re also quiet, require little maintenance, and are safe—making them a popular choice for home heating.

Central heating/plumbed radiators 

Central heating (or plumbed radiators) bring a cosy warmth to every corner of a home. These radiators are part of a heating system where a boiler heats water and sends it through pipes to each radiator. As the hot water flows through the radiators, they release gentle, consistent heat.

Often controlled by a thermostat, plumbed radiators allow you to adjust the temperature across the whole house, making it easy to stay warm in winter. To ensure they work as efficiently as possible it's important to bleed plumbed radiators from time to time, releasing any trapped air that can reduce their performance.

Although setting them up and maintaining them requires some effort, they’re a cost-effective and reliable choice for keeping your home toasty all year long.

Dual-fuel radiators 

Dual-fuel radiators offer the best of both worlds, combining the convenience of electric heating with the efficiency of a central heating system.

In the colder months, they connect to your central heating and distribute warmth alongside your main radiators. But in milder seasons, you can switch to electric mode, allowing individual control without needing to heat the whole house.

The flexibility of dual-fuel radiators makes them an ideal choice for spaces like bathrooms, where you might want extra warmth without turning on the entire heating system.

Oil-filled radiators  

Oil-filled radiators are a great option for quiet, steady warmth. They work by heating up thermal oil that is sealed inside the radiator.

As the oil warms it circulates and radiates heat evenly into the room. This type of radiator retains heat well even after it’s turned off, meaning it keeps spaces warm longer without constantly using energy.

Because they don’t have any moving parts, oil-filled radiators operate silently—making them ideal for bedrooms or home offices. They’re also easy to move around, require minimal maintenance, and have built-in safety features like overheat protection.

Radiators also come in a range of styles and materials 

Radiators aren’t just about functionality: they also come in a variety of styles to suit different home aesthetics and needs.

Beyond choosing a heating type, homeowners can also select from traditional to modern designs.

Single panel radiators (type 11 radiator)

Single panel radiators, also known as type 11 radiators, are a popular and practical choice, especially for smaller rooms or spaces with lower heating needs. Their slim, simple design provides gentle, efficient heat, making them ideal for areas like bathrooms, hallways, and small bedrooms.

A single-panel radiator works by circulating hot water from the central heating system through a single flat panel. As the hot water flows through, it heats up the panel, which then heats up the room. Some single-panel radiators also have convector fins attached behind the panel, which help to increase heat output by allowing more surface area for warmth to spread.

Double panel radiators (type 21 and 22 radiators)

Double panel radiators, also known as type 21 and 22 radiators are a popular choice for larger spaces like living rooms.

Type 21 and type 22 radiators both come with a double panel, but type 21 radiators have one set of convector fins, and type 22 radiators have two sets.

They work by circulating hot water from the central heating system through two panels, each equipped with convector fins between them. These fins increase the radiator's surface area, allowing it to emit more heat into the room.

Aluminium radiators 

Aluminium radiators are a great pick for anyone who loves fast, efficient warmth. Since aluminium is a superconductor, these radiators heat up far quicker and more efficiently than other materials. They’re also lightweight, making installation a breeze.

Aluminium radiators bring together style, practicality, and serious efficiency, making them a modern favourite for reliable home heating.

Cast iron radiators 

Cast iron radiators are known for their timeless style and effective heat retention. Their classic design adds a touch of vintage charm to any space, making them a popular choice for period properties or homes with traditional décor.

Cast iron radiators take longer to heat up but tend to stay warm for longer through natural convection. This means they can provide consistent, efficient heating even after the central heating is turned off.

What size radiator do I need? 

The size of the radiator needed for your room depends on a few key factors including the room’s size, the windows, walls, and the type of radiator used. All these factors will impact how effectively they’ll heat your space. 

You can calculate what size radiator you’ll need for each room by working out your room's heat loss requirement, which is based on your space and the natural loss of heat through doors and windows. To calculate your room’s heat loss requirement, you’ll need the following information: 

• The room in which the radiator will be located
• Dimensions of the room (length, width, and height)
• Type of windows/ doors in the room (i.e. single or double-glazed)
• Construction type of the walls, floor and ceiling to determine U Value

To make this easier, try using an online calculator like B&Q’s to give you an idea about your requirements.

Enjoy worry-free warmth with HomeServe  

At HomeServe, we’re here to ensure your plumbed radiators and heating system run smoothly all year round. Whether you need dependable boiler cover or expert professional repairs, our team is ready to help when you need us most.

You can count on us to keep your home warm and your heating running smoothly year-round.