A mechanically ventilated project space has the following zones and ventilation

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试卷: LEED AP ID+C 模拟试卷D[查看]
A mechanically ventilated project space has the following zones and ventilation rates:

Area(sf)：Office 8,000 ；Conference room 750 ；Reception area 400 .
Standard airflow:Office 0.088;Conference room 0.380 ;Reception area 0.530,
Design Airflow:Office 0.120;Conference room 0.450; Reception area 0.722.

What is true about this projects ability to earn Indoor Environmental Quality Credit, Increased Ventilation?
A: The conference room can be excluded from the calculations and the project will earn the credit
B: All spaces have achieved the 30% requirements for increased ventilation
C: The credit cannot be achieved because the conference room air flow has not met the 30% requirement
D: The average ventilation rate of the spaces based on their areas is enough to achieve the credit

参考答案: C

本题解释:
Notes:

Reference: Indoor Environmental Quality Credit, Increased Ventilation, Calculations

For this credit the ventilation must increase by 30% to ALL occupied spaces. The rates cannot be averaged. First check the percent increase for each space:

Office: (1 - (0.120 / 0.088)) X 100 = 36% increase

Conference room: (1 - (0.450 / 0.380)) X 100 = 18% increase

Reception area: (1 - (0.722 / 0.530)) X 100 = 36% increase

The conference room does not have enough ventilation so the credit cannot be achieved unless the air flow is increased to meet the 30% threshold.