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The climate factors screen allows input of monthly figures for rainfall, number of days on which it rains and minimum and maximum temperatures. These average figures are maintained for many areas and can be obtained from local weather bureaus.
HEAS allows plotting any of cost, consumption and greenhouse gas equivalent against any one of the above four climate factors.
This figure shows monthly climate figures for an area in Melbourne, Australia.
Similar figures are available for most regions of the world.
This graph plots maximum daily temperature against electricity consumption. In this household electricity is used for oven cooking, lighting, airconditioning and other appliances. Perhaps the winter increase in electricity consumption is related to increased time inside. Gas heating is used in this house, but electricity is used to drive the fans.
This graph clearly shows the increased gas consumption for heating over winter. Gas is also used for cooking and hot water.
The household has a modest lawn area and garden plants which can require supplementary watering. Melbourne regulations now prohibit watering of lawns and restrict watering of gardens. The graph does not indicate a high correlation between rainfall and water use. Comparison with the graphs above suggests that temperature is more important.
This graph is similar to the above except that it plots water consumption against days on which some rain has fallen.
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