Aluminium radiators transfer the heat from the water to the air in the room faster than steel radiators. This means that they require less heated water from the boiler and will be faster to respond to changes in the room heat requirement, hence reducing any wasted heat. As aluminium radiators are fairly new, it is difficult to find quantifiable data about potential energy savings, especially as it will vary depending on location. However, some clever engineers we know estimate that using them could save 5-10% off your annual heating bill. Aluminium radiators also offer other environmentally friendly benefits. For one thing they are made of recycled material, so next time you recycle your drinks can, consider that it could end up as part of a new radiator. Also, because they have a lower water content, they can often be smaller than more traditional radiators. This can be useful when using them with low temperature heating systems, such as ground source heat pumps, because you do not need a large radiator to compensate for the lower water temperatures.