Vaillant 180L Unistor S/C Cylinder20235267

The Vaillant Unistor unvented hot water storage cylinder can be used when converting from an open-vented system with a cold water tank in the loft to a sealed boiler and cylinder system, thus saving space and enhancing water pressure. Upgrading an old copper cylinder to a new Unistor unvented cylinder as part of a heating system improvement will reduce cylinder heat losses, which results in increasing the efficiency of the heating system as well as saving money on your fuel bills.