Hot water systems

In hot water storage systems for residential buildings, hot water must be heated to a minimum of 60°C to prevent the growth of bacteria such as Legionella.

The fitment of a temperature control device ensures that the hot water is delivered to taps at a maximum of 50°C. This temperature is sufficient for domestic hygiene purposes and effectively reduces the risk of scalding-related injuries from hot water.

A temperature control device must be fitted to all new and replacement hot water systems. Further details regarding the circumstances where a temperature control device is required to be fitted can be found in the Requirements for installing temperature control devices guideline (PDF, 172KB).

Solar and heat pump endorsement

Solar hot water and heat pump hot water systems must be installed by a hot water installer with a solar and heat pump endorsement from the Queensland Building and Construction Commission (QBCC).

Related resources

• Read more about hot water systems on the Australian Government's Your Home website.