Credit 3: Water Use Reduction 2–4 Points Intent To further increase

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试卷: WE 节水[查看]
Credit 3: Water Use Reduction
2–4 Points
Intent
To further increase water efficiency within buildings to reduce the burden on municipal water supply and wastewater
systems.
Requirements
Employ strategies that in aggregate use less water than the water use baseline calculated for the building (not
including irrigation). The minimum water savings percentage for each point threshold is as follows:
Percentage Reduction Points
30% 2
35% 3
40% 4
Calculate the baseline according to the commercial and/or residential baselines outlined below.1 Calculations are
based on estimated occupant usage and must include only the following fixtures and fixture fittings (as applicable to
the project scope): water closets, urinals, lavatory faucets, showers, kitchen sink faucets and pre-rinse spray valves.

The following fixtures, fittings and appliances are outside the scope of the water use reduction calculation:
-- Commercial Steam Cookers
-- Commercial Dishwashers
-- Automatic Commercial Ice Makers
-- Commercial (family-sized) Clothes Washers
-- Residential Clothes Washers
-- Standard and Compact Residential Dishwashers

Potential Technologies & Strategies
Use WaterSense-certified fixtures and fixture fittings where available. Use high-efficiency fixtures (e.g., water closets
and urinals) and dry fixtures, such as toilets attached to composting systems, to reduce the potable water demand.
Consider using alternative on-site sources of water (e.g., rainwater, stormwater, and air conditioner condensate,
graywater) for nonpotable applications (e.g., toilet and urinal flushing, custodial uses). The quality of any alternative
source of water being used must be taken into consideration based on its application or use.

WE C3: 减少饮用水的使用
2–4分

目的
建筑中提高节水，减轻市政供水、排水系统负担。

要求
采取相应措施，使建筑总用水量相对基准建筑减少用水量（绿化浇灌不包括）。得分的最小减
少用水量的比例如下：
节水比例得分
30% 2
35% 3
40% 4
按以下基数计算商业建筑、居住建筑的基准用水量1。计算基于用户使用的估算，但只能包括这
些用水器具（如果对工程适合）：冲水便器、小便器、面盆水嘴、淋浴、厨房水槽龙头、粗洗
喷洒龙头。
以下器具、配件和产品不能计入节水计算中：
-- 商业烝箱
-- 商业洗碗机
-- 商业制冰机
-- 商业（家用尺寸）洗衣机
-- 住宅用洗衣机
-- 标准和小型住宅洗碗机

技术措施和策略
恰当使用经认证的用水器具和配件，采用高节水器具（如节水便器和小便器）、或干式便器，
如便器与生化制费系统关联。减少使用自来水，考虑采用就地水源（如雨水、空调冷凝水）和
再生水。所有替代水源的水质应符合相关要求。