Combination cylinders are similar to a traditional vented cylinder, fed by a header tank. Unlike standard vented cylinders, combination cylinders incorporate this tank in the unit. Perfect for those living in apartments without a suitable loft space. With the feeding tank built-in, there is no need for a bulky header tank, which simplifies the installation process and significantly reduces the overall cost of your central heating system. Our range of quality combination cylinders is available as either a direct or indirect model, thus giving you the option to heat your hot water with a primary central heating boiler or via immersion elements.