HOUSEHOLD ENERGY CONSUMPTION: 30%
Conventional electric hot water cylinders: Often poorly insulated, these are inefficient. Older, smaller (<180litres) and low pressure cylinders are particularly bad offenders.
Instant electric water heaters: heat water on demand where it is used, eliminating loss from storage cylinders and pipes. Gas hot water storage systems: more efficient than electric cylinders and not affected by power cuts. Gas ondemand systems are even more efficient. Solar: solar has high installation costs, but low running costs. Free hot water when the sun is shining, but you have to revert to the traditional hot water cylinder when it’s not.
Heat pump water heaters: Moderate installation cost. Three to four times more efficient than electric water cylinders. Can knock 66% off your hot water bill.