Unvented Hot Water

Unvented systems are enjoying universal popularity compared with the open vented systems which are fed from cold water storage tanks generally fitted in the roof space.

The traditional British domestic hot water supply system, in which water is heated and stored for use, is based on cold water feed from a storage cistern to a heated cylinder that is vented to the atmosphere. The flow rate and pressure of the hot water discharged from the hot water outlets is then dependent on the height of the storage cistern above the outlets.

A Tribune domestic hot water systems will utilize cold water supplied directly from the mains to the heated storage cylinder. Included with the cylinder is a package of safety devices and controls to regulate temperature and pressures within the system. This type of system can provide flow rates in excess of 25 litres/min.