How much fresh air take in HVAC system

Question

Accepted Answer

The amount of fresh air taken in by an HVAC system depends on various factors such as the size of the building, occupancy, and local codes.

The amount of fresh air is typically measured in cubic feet per minute (CFM)
ASHRAE Standard 62.1 provides guidelines for minimum ventilation rates based on occupancy and building type
Local codes and regulations may also dictate the amount of fresh air required
The HVAC system should be designed to balance the amount of fresh air with the need for energy efficiency
Factors such as outdoor air quality and humidity levels should also be considered