Energy_Efficiency.pdf

But insulation isnt only about roofs and ceilings

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But insulation isn’t only about roofs and ceilings. Save up to an additional 20% of heating and cooling energy with wall insulation 8 . Insulation’s ability to resist heat flow in or out is known as its ‘R-value.’ The higher the R-value, the better the insulation. In Western Australia there are minimum building standards for insulation. Ask your builder or local council about the requirements that affect your new home. Installing insulation that exceeds the minimum standards will result in more energy savings and greater comfort. 7
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3. Water heating Water heating for showers, baths and washing clothes accounts for around a quarter of typical household energy use (see page 4). Restrictions on the type of water heater installed in new homes have been in place in Western Australia since 2007 9 . You basically have the choice of a minimum five-star rated gas water heater (storage tank or instantaneous), an electric heat pump or a solar water heater. Choose a properly sized water heater that is not too small so that you run out, but not too large that it will heat water you do not need. And be mindful of future hot water needs, for example as your family grows, especially into teenagers! Of all commonly used residential hot water systems, gas-boosted solar water heaters are the most environmentally friendly and cost-effective. Leading builders will often package solar water heating as a standard inclusion. High-efficiency gas heaters can be a good option when there is shade or a lack of space on the roof. And heat pumps can be a good option for two storey premises and homes without access to piped gas. 8 New home fit-out Your 6-Star Guide to operating an energy-efficient home
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4. Appliances Many of us have bought domestic appliances in recent years that bear a rainbow shaped sticker that displays a number of stars. There are stickers that indicate electrical efficiency and others – primarily on washing machines and water heaters – that can provide information about water usage. The rainbow shaped stickers now feature up to ten stars (older versions show six). The more stars on the coloured background, the more energy efficient the appliance is. But be careful! When choosing between appliances you must compare like with like. A large fridge/freezer may have more stars than a smaller model. While this means the big fridge is more energy efficient, it still might use more power overall than the smaller one 10 . ! Compare the kilowatt hour (kWh) values on the same sticker. The lower the number, the lower the running costs. You can even multiply the kWh value by your electricity tariff to calculate the yearly running cost difference between different models. The Government has recently extended coverage to appliances powered by gas and other features of a new home that may affect the energy efficiency such as insulation, window glass and air conditioner ducting 10 . This updated scheme will result in minimum performance requirements for certain appliances, greenhouse gas intensity ratings for various building products and the ability to estimate any negative environmental effects associated with regulated products.
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