Heating water is the largest contributor of greenhouse gas emissions from Australian homes and is the second largest segment of energy usage in homes.
In most Australian homes, the main form of heating water is through the use of gas or electricity. More than half of hot water is used for showering, one-third for laundry, and the remaining amounts in the kitchen.
Potentially, there could be a lot of cost savings if homes reduce their hot water usage, swap their hot water system to a renewable source such as solar, or simply install water-efficient showerheads and taps.
Homes should consider their household size and usage patterns so as to install an appropriate size hot water system.