**Fresh Air Calculation – Short Description:** Fresh air calculation determines the amount of outside air needed to maintain indoor air quality and meet ventilation standards. It’s based on factors like occupancy, room size, and usage type, following guidelines such as ASHRAE 62.1. The required fresh air is usually measured in **CFM (Cubic Feet per Minute)** per person or per squar... https://mepdetails.com/how-to-fresh-air-calculation-in-hvac-ashrae-62-1/