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    Colour: Various Sizes
    Home Series Classic Compact K3 From: £140.09 Incl VAT Ideal for low energy heating systems, providing outstanding heat output from a smaller radiator footprint, that's the Stelrad Home Series Compact K3
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The Compact K3 Radiator from Stelrad is an ideal radiator for those who want a classically designed model while reaping the benefits of a low energy heating system. Our range of Compact K3 Radiators is available in a range of 20 different sizes and painted in our durable RAL 9016 Traffic White paint, these compact radiators are a must-have for your home.

Available as a K3 model, the Stelrad Compact K3 Radiator is built with 3 radiator panels and 3 convection fins. As the demand for renewable energy increases, we at Stelrad like to remain ahead of the game. Higher capacity radiators, such as the Stelrad Compact K3 Radiator, are some of the most energy-efficient radiators with a smaller carbon footprint, meaning a powerful heat dispersing system, with less of an environmental impact. Enjoy guilt-free warmth from Stelrad.

Possessing three sets of panels and three sets of fins ensures that additional heat is emitted, without taking up too much space in your home. The Stelrad Compact K3 Radiator is only slightly larger than any of our K2 models, making it a suitable choice for low energy systems while providing the highest possible heat output. Size options available range from heights of 300mm – 700mm and lengths of 400 – 2400mm, meaning you can conserve space, and enjoy your home with the layout you decide while remaining warm all year long.

If you need help deciding what size Stelrad Compact K3 Radiator is most suitable for your household, we are here to assist. Use our Radiator Size Search Calculator to figure out which size model is most suitable for you. Additionally, if you are conscious of energy output, you can use our BTU Heat Loss Calculator to decide which of our models will be best for you.

Stelrad Compact K3 Radiators: Efficiency Meets Elegance

We take the production of all our products seriously and make sure they are built to the highest standards and specifications while retaining their attractive exterior. Every Compact K3 Radiator is constructed under ISO 9000 quality systems in the UK, as well as having undergone tightly measured independent laboratory testing. We do this to ensure every Stelrad Compact K3 Radiator is guaranteed to perform to a maximum working pressure of 116 psi (8 bar), conforming to BS EN 442, the European Standard for radiators. We know our models are made to last. That’s why the Compact K3 Radiator comes complete with a 10 Year Manufacturer’s Warranty. We have faith that all of our Compact K3 Radiators are dependable and will last for years to come. Click here to see our Installation Guide on how to set up your Compact K3 Radiator.

Browse our website for more Radiators, including our Vertical RadiatorsTowel Rail Radiators for your Kitchen or Bathroom, our extremely popular Column Radiators, and many more.

If you have any queries regarding the Stelrad Compact K3 Radiator range, any other radiator queries or want to know more, visit our FAQs page where we hope your question will be answered. Alternatively, speak to one of the teams at Stelrad by contacting us. We are always happy to help.

Stelrad Compact K3 Radiators 02


What is a Compact K3 Radiator?

Stelrad Compact K3 Radiators come with three sets of panels and three sets of fins to ensure additional heat is emitted from a radiator that is slightly larger than a K2. The ranges on offer include outputs from 1287-5682 watts (4391-19388 BTU/hr) at a working pressure up to 10 bar.

Why Should I Get a Stelrad Compact K3 Radiator?

Compact K3 Radiators are an ideal choice for lower energy systems as they provide incredible heat output from a smaller footprint. As you would expect from a K3 radiator, the convectors are precision welded directly onto the waterways for greater efficiency and economy but with a flexible connection for the highest commercial and domestic specifications.