Given that an unvented system must be installed by and then for safetey be regularily serviced by a qualified technician what advantages does an unvented system offer over and above a vented system ?
The vented system has the dis-advantage of requiring a cold water supply tank located somewhere higher than the hot water cyclinder. The cold water supply tank however provides a back up store of water for flushing toilets should the mains supply not be available.
The vented system has the dis-advantage of requiring a cold water supply tank located somewhere higher than the hot water cyclinder. The cold water supply tank however provides a back up store of water for flushing toilets should the mains supply not be available.