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Created on LEED Interpretation

ID#

li-5740

Credit NameWEc3.1 - Water use reduction - 20% reduction
Credit CategoryWater efficiency
International ApplicableYes
Campus ApplicableNo

Rating System

LEED BD+C: New Construction

Rating System Version

v2 - LEED 2.1

Inquiry

Our project is a student services center on a college campus in California and includes a student store, staff offices, counseling centers, testing rooms, etc. There will be some full and part-time staff as well as various students temporarily occupying the building to take care of student business or shop at the student store, etc. We have reviewed the relevant pages in the reference guide, the CIRs, and the calculator and have not found answers to our questions regarding this credit. 1. How do we determine the number of male occupants and female occupants for the purposes of Water Credit 3.1, 3.2 and 2? Do we use the same criteria and formula laid out in Site Credit 4? And how do we account for short-term visitors to the building (e.g. someone shopping in the student store or stopping in for an appointment or to pick up forms from one of the offices)? 2. What criteria, standards, or assumptions do we base the "daily uses" and "duration of use" per fixture type for each gender on? The reference guide provides tables and criteria for the flow rates of various flush and flow fixtures for determining the base case and the design case, but does not seem to address "daily uses" and "duration." We look forward to your specific direction on these questions.

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