Rating System

LEED BD+C: New Construction

Rating System Version

v2 - LEED 2.0

Inquiry

The LEED Letter Template and calculation equations for this credit allows for the reduction of potable water use by subtracting annual graywater or rainwater harvest. Our building project will include the design of a testing lab that requires the maintenance of a constant fully saturated environment (100% humidity) achieved through a water misting system. The system will be continuously supplied from the potable water supply and excess water will discharge to the sanitary waste drain. In order to reduce the waste of this potable water supply the misting system will include a provision where the excess potable water will be collected and re-circulated rather than made up with potable water. This reclaimed potable water will represent a significant potable water savings versus the baseline approach of draining it to sanitary waste.\n\nWe, therefore, request an interpretation as to whether the reclaim of the excess potable water to be used for this process may be counted as graywater harvest for successfully meeting the intent of Water Efficiency Credit 3.2.