Air Quality Strategies, what is the minimum Design Zone Outdoor Airflow?

The Required Breathing Zone Outdoor Airflow Vbz for a new banking facility is 0.120 CFM/ft2 (0.6 L/s/m2). If the team decides to attempt Increased Ventilation under Option 2 in the Indoor Environmental Quality Credit, Enhanced Indoor

Air Quality Strategies, what is the minimum Design Zone Outdoor Airflow?
A . 0.144 CFM/ft2 (0.73 (L/s)/m2)
B . 0.156 CFM/ft2 (0.79 (L/s)/m2)
C . 0.168 CFM/ft2 (0.85 (L/s)/m2)
D . 0.30 CFM/ft2 (1.5 (L/s)/m2)

Answer: A

Explanation:

This option requires the project to increase the breathing zone outdoor airflow by at least 20% above the minimum rates required by ASHRAE 62.1-2010. Therefore, the minimum design zone outdoor airflow is 0.120 CFM/ft2 x 1.2 = 0.144 CFM/ft2.

References: = [LEED v4: Building Design + Construction Guide], [Indoor Environmental Quality Credit: Enhanced Indoor Air Quality Strategies], [ASHRAE 62.1-2010 User’s Manual].