Get the temperature right - The recommended setting for thermostats is 60°C for storage hot water systems and no more than 50°C on instantaneous systems.
Give your hot water a holiday - If you're away for more than a week, turning off your storage hot water system saves money and energy. When turning it back on allow time for the water to become hot enough to kill any bacteria that may have grown. The water must remain above 60°C for at least 35 minutes before you can safely use it. It could take several hours to reach this temperature.
Install a water-efficient showerhead - A 4-star rated showerhead could save a family of 4 (with average expenses) around $315 a year on water bills, there will also be savings on energy bills because less water will need to be heated.
Replacing a hot water system - If your system fails, replacing it with a suitable energy-efficient model can reduce energy use. Research the options in advance to avoid making a rushed decision.
Type of hot water systems
Electric – Cheap to buy and install but generally expensive to run.
Solar – Purchase and installation of these systems is generally expensive.
Heat pump – Highly efficient, uses 70% less energy than conventional electric hot water systems. They're expensive to buy but cheaper to run and come in 2 types
- Integrated with tank and compressor combined
- Split with the tank and compressor separate
Gas – Gas hot water heaters are usually installed outdoors because of venting requirements. They have medium-to-high purchase, installation and running costs. Continuous flow (also called instantaneous) is the most common type of gas water heater. Gas storage systems are particularly inefficient, especially in cold climates. They have very high heat loss because it’s not possible to insulate at the point where the gas flame is heating the tank.