You can calculate the amount of water you can collect from your roof by using this simple formula.
Roof Area Length (Metres) X Width (Metres) = Area (Square Metres) (12 Metres X 10 Metres = 120 Square Metres) Catchment Perth Average Rainfall = 800mm or 0.8 Metres Square Metres X 0.8 X 1000 = Litres Per Year (120 X 0.8 X 1000 = 96,000 Litres Per Year) |
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~ These calculations should only be used as a rough guide ~ |
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