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Regulations do not require water heaters sold in Australia to display an Energy Rating Label. The energy label found on gas water heaters is industry run and not regulated by government.

Look for available Australian, state and territory government rebates and assistance. Solar and heat pump hot water systems could be eligible for renewable power incentives in the form of small-scale technology certificates (STCs). An STC is a measure of renewable energy which can be traded for cash or a discount on the purchase price of the system.

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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.

Water heating is the second largest segment of household energy use, ranging from 15% to 30%. It's the largest source of greenhouse gas emissions (up to 25%) from an average Australian home. When a renewable source is used, the emissions are reduced or eliminated.

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We acknowledge the Traditional Owners of Country throughout Australia and recognise their continuing connection to land, waters and culture. We pay our respects to their Elders past and present.

If your existing heater fails, some installers will lend you a temporary electric hot water heater while you choose the most suitable system.

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Electric storage systems can be switched to an off-peak tariff to reduce electricity costs, but this does not reduce greenhouse gas emissions. Water is only heated during the off-peak period when energy prices are cheaper.

Storage-based – water stored in a tank and kept hot, ready at all times. Off-peak systems only heat during off-peak times.

Electric storage systems are used by around 50% of Australian households. They are the cheapest to buy and install and are generally more expensive to run, unless powered by a solar PV system.

Posted by Olivier Tisserand | Mon, Feb 02, 2015 8 Comments

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Gas hot water heaters are usually installed outdoors because of venting requirements. They have medium-to-high purchase, installation and running costs.

Heat pump water heaters are highly efficient and use 30% of the energy of a conventional electric hot water system. These systems use a refrigeration cycle to extract heat from the air to heat the water.

In areas with less mid-year sun and long cold nights, solar hot water units may require a booster using gas or electricity.

Solar hot water systems consist of solar panels or evacuated tubes, and a storage tank unit which is either installed on the roof or at ground level.