Domestic boiler cylinders

Why uniSTOR?
The high quality, Stainless Steel uniSTOR cylinder is a Hot Water Storage facility, ideal for domestic properties with a new or existing sealed system or open vent boiler.
uniSTOR cylinders are ‘unvented’ cylinders which means they can operate efficiently under higher pressures, for example in a sealed heating system.
Available in a wide range of hot water storage capacities, the uniSTOR is suitable for almost all types of property with a sealed system or open vent boiler. Being suitable in particular for larger properties with multiple bathrooms, heating systems using a cylinder can often provide a higher level of hot water than a combination boiler.
Vaillant uniSTOR unvented cylinders can be used when converting from an open vented system (with a cold water tank in the loft) to a sealed system (boiler and cylinder system). Converting to a sealed system can help save space e.g. during loft conversions etc when there is no room for a tank, and in most cases will provide higher water pressure at your Taps and shower.
By upgrading an old copper cylinder (with insulation jacket) to a new uniSTOR unvented cylinder (as part of a heating system upgrade), you can make your heating system more efficient by reducing your cylinder heat losses significantly, which in turn can help to reduce your fuel bills.
What's in the range?