ENHANCED WATER EFFICIENCY
增强用水效率

WEc2 New Construction (1–8 points) / Core and Shell (1–7 points)
新建建筑 (1–8分) / 核心与外壳 (1–7分)

Impact Area Alignment

☑ Decarbonization
☑ Quality of Life
☑ Ecological Conservation and Restoration

影响领域：三项全选

INTENT / 目的

To achieve additional reductions in aggregate water consumption beyond the prerequisite requirements. To examine the water use of the project holistically to identify added opportunities for water savings with indoor fixtures and fittings, outdoor water, and process water.

在先决条件要求基础上实现额外的综合用水量减少。从整体考察项目用水，发掘室内器具和配件、室外用水及工艺용水的额外节水机会。

Overview of Point Allocation / 分值分配概览

Achievement Pathway / 实现路径	NC Points	CS Points
Indoor Water Use Reduction / 室内用水减少	1–5	1–5
Outdoor Water Use Reduction / 室外用水减少	1–2	1–2
Process Water Use Reduction / 工艺用水减少	1–3	1–2
Total / 总计	8	7

Indoor Water Use Reduction (1–5 points)
室内用水减少（1–5分）

Path 1. Percentage Reduction / 路径1：百分比减少 — Earn points for additional reductions in aggregate indoor water use beyond the WEp2 prerequisite, as specified in Table 1. All newly installed toilets, urinals, private lavatory faucets, and showerheads that are eligible for labeling must be WaterSense labeled.

按表1的规定，对超过WEp2先决条件要求的室内综合用水额外减少给予加分。所有符合条件的马桶、小便器、私人洗手间水龙头和淋浴花洒须为WaterSense标签产品。

Table 1. Points for Indoor Water Use Reduction (Percentage Beyond Prerequisite)
表1. 室内用水减少得分表（超出先决条件百分比）
Indoor Water Use Reduction / 室内用水减少	Points
25% （即先决条件20% + 额外5%）	1
30%	2
35%	3
40%	4
45%	5

Path 2. Alternative Compliance / 路径2：替代达标 — Projects may demonstrate alternative compliance through meeting the performance requirements of applicable international, national, or local water-efficiency codes and standards.

项目可通过满足适用的国际、国家或地方水效规范标准的性能要求来证明替代达标。

Outdoor Water Use Reduction (1–2 points)
室外用水减少（1–2分）

No outdoor water use is required by the prerequisite. Points are earned for reducing potable or natural surface or subsurface water for landscape irrigation compared to a baseline landscape design. The baseline is calculated by multiplying the landscape area by an evapotranspiration rate for the site-specific climate data. Two methods are available:

先决条件不要求室外用水。积分通过与基准景观设计相比，减少景观灌溉的饮用水或地表/地下水使用来获取。基准计算方法为景观面积乘以场地特定气候数据的蒸腾速率。提供两种方法：

Method 1. No Permanent Irrigation Required (2 points)
方法1：无需永久灌溉（2分）

Design the landscape so that it does not require a permanent irrigation system beyond a temporary irrigation system for a maximum of two years for plant establishment.

景观设计为在植物定植期间（最多两年）仅需临时灌溉系统而无需永久灌溉系统。

Method 2. Reduced Irrigation (1–2 points)
方法2：减少灌溉（1–2分）

Reduce the project's landscape water requirement by at least 50% (1 point) or 75% (2 points) from the calculated baseline. Reductions must be achieved through any combination of plant species selection, irrigation efficiency, use of captured rainwater, use of recycled wastewater, and use of public-supplied non-potable water.

将项目的景观用水需求至少减少计算基准的50%（1分）或75%（2分）。须通过植物种类选择、灌溉效率、收集雨水、使用循环废水和公共供应非饮用水的任意组合实现。

Table 2. Points for Outdoor Water Use Reduction
表2. 室外用水减少得分表
Outdoor Water Use Reduction / 室外用水减少	Points
No permanent irrigation / 无永久灌溉	2
≥ 50% reduction / 减少≥50%	1
≥ 75% reduction / 减少≥75%	2

Process Water Use Reduction (NC 1–3 pts / CS 1–2 pts)
工艺用水减少（NC 1–3分 / CS 1–2分）

Cooling Towers and Evaporative Condensers / 冷却塔与蒸发式冷凝器

For cooling towers, achieve additional reductions in potable water use beyond the prerequisite as outlined. Analyze the makeup water quality to determine the maximum potential cycles of concentration without exceeding thresholds for any of the parameters that affect the cycles of concentration. Achieve cycles of concentration equal to the maximum potential minus one (C_max − 1).

在冷却塔方面，实现超出先决条件要求的饮ະ水使用额外减少。分析补水水质以确定最大潜在浓缩周期，不得超过影响浓缩周期的任何参数阈值。实现等于最高潜在周期减一（C_max − 1）的浓缩周期。

Points are awarded according to the number of cycles of concentration achieved, as listed in Table 3:

根据表3所列达到的浓缩周期数授予积分：

Table 3. Points for Cooling Tower Water Reduction
表3. 冷却塔用水减少得分表
Strategy / 策略	Points
C_max − 1 cycles of concentration / 最高潜在周期减1	1
C_max cycles of concentration using 100% non-potable water for makeup / 使用100%非饮用水补水实现C_max	2

Appliances and Process Equipment / 器具与工艺设备

Install ENERGY STAR qualified or performance-equivalent appliances where applicable. The project may also install equipment that meets the performance requirements of applicable CEE (Consortium for Energy Efficiency) tiers, ENERGY STAR Most Efficient designation, or add demand-based controls to minimize hot water circulation pump runtime.

在适用的情况下安装ENERGY STAR合格或性能等效的器具。项目还可安装满足CEE能效等级、ENERGY STAR最高效标识要求的设备，或添加基于需求的控制器以最小化热水循环泵运行时间。

Additional Process Water Strategies / 额外工艺用水策略

Table 4. Additional Points for Process Water Strategies
表4. 工艺用水策略额外得分表
Strategy / 策略	Applicability	Points
Use non-potable water (captured rainwater, recycled wastewater, public-supplied) for cooling tower makeup, >50% of makeup volume 冷却塔补水50%以上使用非饮用水	NC / CS	1
Use non-potable water for all process water needs in laundry, car washing, and similar functions 洗衣、洗车等功能全部使用非饮用水	NC only	1
Install submeters for all process water subsystems and demonstrate 20% additional reduction 为所有工艺用水子系统安装分表并证明额外减少20%	NC only	1

Summary of Process Water Points / 工艺用水分值汇总

Category / 类别	NC	CS
Cooling towers C_max − 1 / 冷却塔最高减1	1	1
Cooling towers C_max + non-potable / 冷却塔最高+非饮用水	2	2
Non-potable >50% makeup / 非饮用水补水>50%	1	—
Non-potable all process water / 全非饮用水工艺	1	—
Submetering + 20% reduction / 分表+20%减排	1	—
Max Process Water Points / 最高工艺分	3	2

Special Conditions / 特殊条件
Healthcare / 医疗设施： May earn up to 3 points for process water strategies that include sterilization equipment, reverse osmosis (RO) systems, vacuum pumps, water purification systems, and laundry operations. Up to 2 points for non-potable water use in cooling tower makeup.
医疗设施可通过包含灭菌设备、反渗透系统、真空泵、净水系统和洗衣操作在内的工艺用水策略最多获得3分。冷却塔非饮用水补水中可最多获得2分。

Data Centers / 数据中心： Points focus on cooling system water efficiency, including water-side economizers, closed-loop cooling, and air-side economizers that reduce mechanical cooling water consumption. Maximum process water: 2 points.
数据中心工艺用水积分侧重于冷却系统水效，包括水侧节能器、闭路冷却和空气侧节能器。最高工艺水2分。