Our Plan is to eliminate 3,700,000 Metric Tonnes of Carbon Dioxide. That's equivalent to 804,000 motor cars off the road each year.

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Exel Power Solutions Pty Ltd. Trading as State Energy Co. ABN: 83 631 081 215
 

  • Olivia Kelly

Hot Water: Impact on energy use

Hot water can be the largest energy user for a household particularly how you heat your hot water has a huge impact on how much energy you are using.

There are four main types of heaters for hot water systems:


1. Storage heaters which have a low upfront capital cost and the cost to heat water is paid according to how much hot water is used. However, it uses a lot of electricity which can be expensive and its supply of hot water each day is limited by storage tank capacity.


2. Instantaneous heaters also known as gas heaters have a low upfront capital cost, the cost to heat water is paid according to how much hot water is used, cost to run will depend on gas prices, unlimited hot water and physically small installation. However, it requires a gas connection, uses a lot of gas when operating, has a required minimum flow to operate and takes longer for heat exchange to reach temperature, so the water may be wasted.


3. Solar hot water systems use a free energy source, reducing the amount of electricity or gas used and if natural heat is not enough, can be boosted with electricity or gas. However, it requires a suitable roof space and a more complicated installation, requires a storage tank, may not be suitable for some cooler climates and is more expensive to install than traditional systems.


4. Heat-pump systems use a free energy source, reducing the amount of electricity or gas used, does not require roof space for installation and if natural heat is not enough, can be boosted with electricity or gas. However, it requires a storage tank, it may not be suitable for some cooler climates, generates noise and is more expensive to install than traditional systems.