A project considering LEED EBOM is looking to add a new rainwater catchment system because it will be lower-cost then replacing old sanitary ware. LEED EBOM fixtures and fittings efficiency is exactly that--there is no way to show reduction of water use through any other means (I don't want to try to input this through an alternative pathway because the credit intention is quite clearly defined). This would appear,then, to be a candidate for an innovation point. Is there any way to understand what the likely benchmark would be in terms of water use reduction? The fixtures reduction is shown in 5% increments but this seems a low benchmark for reducing water use through rainwater catchment. We have a number of small roofs potentially to collect from so the total reduction really makes a difference in terms of investment. Any advice gratefully received!
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David Hubka
Director of OperationsTranswestern Sustainability Services
527 thumbs up
March 24, 2011 - 7:58 am
Set your baseline annual water consumption and calculate the percent savings achieved with the rainwater catchment system. If a reduction of 35% is achieved, an exemplary performance point should be awarded. If the reduction is between 10% - 30% you should be awarded credits under WE Credit #2.