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Aluminium vs. Steel Radiators: Which to Choose

Steel or aluminium, which is better, when it comes to radiators? This is a frequently asked question and the answer is that which is best for your needs and circumstances. Both steel and aluminium radiators have features that are great in what they are meant to do. In fact, aluminium and steel radiators can also look exactly the same, depending on how they are made, how they work and how much they cost.

Keeping that in mind, here, we have come up with a comparative analysis of aluminium radiators vs. steel radiators, which will help you decide which one you want in your home.

Metal Qualities

When buying a radiator, it is important to understand the basics of each metal to choose between steel or aluminium. First of all, aluminium is not a naturally occurring metal in nature. It is derived from aluminium sulfates. It was first produced in the early 18th century and took some decades for mass production. It is a durable, long-lasting metal that resists corrosion due to its thin layer of alumina, as well as resistance to heavy handling because it is softer and more elastic than steel.  In addition, the metal has a very low density, which is equivalent to 2.5 less dense than steel, and it is also five times stronger than steel, making it much easier for you or your installer to install than other building materials.

Iron, on the other hand, is a mixture of iron and carbon and is considered stronger than aluminium.  This is because the more carbon there is, the harder the metal will be. Although steel is cheaper than aluminium, it is much harder to install due to its weight.


When buying a radiator, heat transfer and containment are often the main factors influencing consumer choice. Aluminium works five times faster than steel, which means two things – your room heats up faster, and the metal cools down faster because it turns on or off the thermostat quickly. 

These aluminium radiators are a great way to choose rooms that are used only a few times a year or conservatories, for example. It can also reduce energy consumption, leading to savings on gas, electricity and water bills.

Steel, on the other hand, retains heat much better than aluminium, so your rooms will stay heated for a long time after the central heating is turned off. This means that your radiator will be very hot, so the choices you make depend on the purpose of the radiator in your home.



It is important to remember that the choice of radiator equipment has an indirect effect on the environment. Aluminium is more environmentally friendly than steel. It not only uses less energy to produce the desired heat, but also uses less energy and water to heat the radiator. This will be better for you and the environment because you can save money on accounts as mentioned earlier. 

Aluminium is 100% recycled and is often made of recycled materials, which will be of great benefit to the environment over time.


One last thought you should agree on before buying a radiator is the appearance of it.  As aluminium radiators have recently emerged, you can find the options for color choices and finishes are limited compared to most steel radiators. Aluminium radiators are usually available in simple colors such as white, gray and charcoal. In short, buying aluminium radiators will be more expensive and the choice of colors and designs can be considered limited.

Despite its disadvantages, aluminium radiator is an environmentally friendly and cheaper option. Steel radiators offer almost the opposite of aluminium. At first, they are cheap, versatile, available in various sizes, colors and finish and retain heat for a long time. But the features that allow you to save on aluminium radiators will not be available with steel radiators.

So, when choosing between aluminium radiators vs. steelradiators, it’s really up to you and your requirements. If you are looking for a cheaper option, you can opt for steel, but of you want to save in the long run, you should opt for aluminium radiators.

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