School extension in East Surrey with a roof area of: 1,130m²

Typical usage: Toilet flushing

Average annual rainfall : 942mm per annum
Combined water charge per m³:£1.19
Amount of water available to Envireau: 1,064,460 litres per annum

Value of useable rainwater: £1,266.71 per annum

Payback on capital purchase: 3.5years

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