An unvented hot water cylinder system is a large storage tank normally situated in the airing cupboard, which is used for storing and heating water. These types of systems are popular as they do not require a cold water cistern or tank in the loft.
The unvented cylinder does not require a vent pipe, and instead uses an expansion vessel located next to the cylinder, which can often be more space effective within the property if space is limited.
Contact us to find out more about unvented cylinders.
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"After discovering the bottom part of some of my radiators were never getting warm, I rang Viva Gas for some advice. They were very helpful and sent out an engineer straight away who power flushed my central heating system. It’s now working like it is brand new." - Mrs Swallow