Electric Storage Hot Water Heaters

Electric hot water heaters operate by heating water stored in an insulated tank using electrical heating elements. When a hot water tap is opened, cold water enters the tank and is heated by these elements. The hot water rises to the top of the tank and is delivered to the tap.

The efficiency of an electric hot water heater is measured by its Energy Factor (EF), which considers the amount of hot water produced per unit of fuel consumed over a typical day. They are less efficient than gas models because they typically require more energy to heat water. Newer models are improving in efficiency due to better insulation, more efficient heating elements, and advanced technologies like heat pump water heaters that use electricity to move heat from the air to the water, rather than generating heat directly.

Electric Hot Water System Replacement

Around 27% of electricity used in the average Australian household is for heating water, making hot water systems one of the highest single energy users and greenhouse gas contributors in the home.
Replacing an electric hot water system with a greenhouse efficient system is one of the most effective ways to save money on your energy bill. Most greenhouse efficient hot water systems generally have lower running costs than standard electric systems. Electric hot water systems are being phased out all over Australia