Page 126 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

Major Comments ∗† Formerly LEED 2.2 WEc1 worth 1 point. In LEED 2009, 2 points are earned • for the 50% reduction (formerly WEc1.1). An additional 2 points are earned for No Potable Water use or No Irrigation (LEED 2.2 WEc1.2). Groundwater seepage pumped away • from foundations may be used to replace potable water if stormwater management sys

EP Pts 2.2 − − − 1 1 for 40% reduction and 1 for reducing process water 10% 3

EP Pts 2009 na − 1 1 for 45% reduction. No Process Water reduction EP pt. 2 ∗ Calculation variations for 2009 for water use reduction include: Addressing residential showers with multiple showerheads (Can allow additional flow for areas greater than 2500 in 2 ), baseline faucet flow at 2.2 gpm for private (e.g., hotel ro

Pts 2.2 − 1 1 1 1 1 5 lavatory fixtures. LEED 2009 gives longer residential shower, kitchen sink and lavatory faucet durations (8, 1, and 1 min, respectively) than for commercial. WE Summary Table of Major Differences between Version 2.2 and Version 2009 and Associated Points (Pts)

Pts 2009 na 2−4 2 2−4 10

Subcategory 2.2 None WEc1.1: Water Efficient Landscaping. Reduce by 50% WEc1.2: Water Efficient Landscaping. No Potable Water Use or No Irrigation WEc2: Innovative Wastewater Technologies WEc3.1: Water Use Reduction. 20% Reduction WEc3.2: Water Use Reduction. 30% Reduction Total

Subcategory 2009 WEp1: Water Use Reduction Required WEc1: Water Efficient Landscaping WEc2: Innovative Wastewater Technologies WEc3: Water Use Reduction TABLE 3.0.0

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