Ventilation Air Cooling Load Estimation

Every interior space where people work, play or rest has a fresh air requirement due to the Carbon Dioxide we expend. For auditoriums the need is 15 Cfm (Cubic feet per minute of air) per occupant. In an office environment the requirement is 20 Cfm per occupant. In the summer air is hot and humid and when that air is used as ventilation air, the heat and humidity need to be removed. The sensible and latent heat of the air needs to be estimated in Btu/h (British Thermal Units per Hour) to determine the added amount of “cooling power” required to condition the space to the desired temperature setting.