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Anleitung Zusammenfassung
The information in this publication was derived from various sources, is provided in good faith and believed to be correct when published. Products listed in this publication are provided for the purposes of information only and reference in this publication should not be construed as an official endorsement by any of the government agencies participating in the Reach for the Stars Program. This document can be made available in alternative formats to meet the needs of people with disabilities. Published in July 2007 by the Sustainable Energy Development Office Printed on recycled paper gas water heaters Using the choosing Energy Rating an energy smart gas water heater label Most people consider features such as type, capacity, looks and price when buying a gas water heater. Lifetime running costs can easily exceed the purchase price of a gas water heater. So, it’s important to also check the energy efficiency and running costs when shopping around. All new gas water heaters are rated for energy efficiency by the Australian Gas Association, and most carry Energy Rating labels to help you compare the energy efficiency of different models in the same situation. Quite simply, the more stars you see, the more money you’ll save and the better it will be for our environment. Even a one star improvement can give savings of around 6% on running costs. This consumer guide tells you how you can use the gas Energy Rating labels to compare different models of gas water heaters. If you’re about to buy a new gas water heater: • Compare the star ratings! • Ask for a Top Energy Saver Award Winner (TESAW) model—they are the most energy efficient appliances on the market! Star Rating Star Rating band Comparative energy consumption box Australian Standard When comparing models, make sure you: • Check the star rating The more stars, the more energy efficient the model. • Check the red star rating band The further this extends across the half circle, the more energy efficient the model. • Check the comparative energy consumption box The number in the red box is the amount of gas used by the unit over a year (in MJ). It is based on testing to the Australian Standard listed on the label, and a delivery of 200 litres of hot water per day, raised by 45.C above the cold water temperature. The lower the number, the less it will cost to run and the lower the environmental impact. If you are comparing two models of the same type and capacity which have the same star rating, the model with the lower energy consumption is the more energy efficient one. The more stars you see, the more you’ll save Estimating top star rated running costs gas water heaters Use the number in the energy consumption box as a guide to the typical running costs of a model. Multiply it by your gas tariff to estimate the approximate annual running costs, then multiply this by 12 to estimate the lifetime running costs. Example: For an energy consumption of 21,500 MJ per year and a natural gas tariff of 2.1 cents per MJ ($0.021/MJ), the lifetime running cost is: 21,500 x $0.021 x 12 = $5,418 The labels can also be used to estimate the lifetime greenhouse gas emissions. For each MJ of gas consumed, around 0.06 kg of carbon dioxide is emitted, so for the example above the greenhouse gas emissions are: 21,500 x 0.06 x 12 = 15,480 kg or 15.48 tonnes The actual running costs and greenhouse gas emissions will depend on where you live, your gas type and tariff,...
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