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Solar reflectance: the fraction of sunlight a surface reflects, from 0 (absorbs) to 1 (reflects).
Solar Reflectance Index: a measure combining reflectance and emittance to rate surface heat buildup.
Water safe for drinking and human use.
Relatively clean wastewater from sinks, showers, and washers, excluding toilets.
Wastewater from toilets and urinals; typically requires advanced treatment.
Landscape design using drought‑tolerant plants, efficient irrigation, and mulch to cut water use.
What are WE minimum flow rates?
Prescriptive max: toilet 1.28 gpf, urinal 0.50 gpf, shower 2.0 gpm, private lav 1.5 gpm, kitchen 1.8 gpm.
What is the indoor performance path?
Show a 20%+ reduction from baseline aggregate fixture flows to meet the prerequisite.
What is water metering and reporting?
Install whole‑building potable water meters and share data with USGBC annually for 5 years.
What is submetering in WEc1?
Meters for fixtures, irrigation, makeup water, kitchens, or laundry with hourly data access.
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