The outdoor air inlet damper of an HVAC air handling unit may be split into two parts to provide:
a. Extra outside air when extra ventilation is required
b. A means of controlling building static pressure
c. Minimum outside air during periods when maximum air is being exhausted
d. Maximum outside air during periods when minimum air is being exhausted
e. Minimum outside air required for ventilation, during times of maximum return air recirculation
Answer: E