What is the baseline water demand of a building?

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试卷: LEED GA模拟题C[查看]
What is the baseline water demand of a building?
A: The annual water rate as determined by water bills
B: The annual installed fixture and fitting water consumption rate
C: The annual fixture and fitting water consumption based on the rates from the EPAct 1992 standard
D: The amount of graywater and rainwater harvesting a building is planning to use

参考答案: C

本题解释:
Notes:

Reference: LEED 2009 for New Construction and Major Renovations Rating System

To calculate water consumption in a building, a baseline water demand is compared to an installed design case.

The baseline demand uses the fixture and flow rates from the EPAct 1992 standard. For example, commercial toilets have 1.6 gallons per flush, commercial urinals have 1.0 gallons per flush. These rates for all toilets, urinals, and faucets are used to create a baseline. Also used is the number of Full Time Equivalents (FTEs) to determine how frequently the fixtures will be used.

The design case water consumption (or design demand) calculates the rates based on the higher efficiency fixtures that will be installed. For example if waterless urinals are used the design case will calculate them at their zero gallon per flush rate. The percent in water savings is determined by dividing the design case by the baseline case and subtracting that from the number 1

Example:

Baseline case: 100,000 gallons of water / year
Design case: 60,000 gallons of water /year

60,000/100,000 = 0.6
1 -0.6 = 0.4

Percent reduction = 40% reduction