The 24 kw is the mid-range system boiler that has been designed and built by Vaillant for performance, gas-efficiency and usability.

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For houses with mid-sized heat loads and loft storage space this could be the perfect boiler for you.

The 624 incorporates innovative new design, such as the high-efficiency 2 speed pump and flame lit detection system to help minimise wasteful losses as well as reduce noise – It has consequently been awarded the Quiet Mark seal of approval.