Evidence for Large-Scale Water Efficiency Phase II Final Report (2011)

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In this final report of Phase II of the Evidence Base Project Waterwise analyses new data on the effectiveness of domestic and schools projects while providing a summary of lessons learnt from two 2010 reports on domestic water efficiency retrofitting and water efficiency retrofitting in schools. The reason for revisiting four of the nine trials originally analysed was to improve the industry’s understanding of the longevity of water savings in domestic water efficiency retrofitting. The mean length of additional monitoring period was 2.8 years, over which savings fell on average 20.6 % or by 5.4 litre/property/day.