I am trying to figure out what the loss of flow due to friction in an 8" square duct versus a 9" round duct would be. This is an exhaust duct 80' in height. How do I relate pressure drop in in wg to cfm and velocity? Or, how do I relate cfm and velocity to pressure? Any help would be greatly...
Each room is supposed to flow 45 cfm after balancing. What I want to calculate is how much airflow I am getting through the vents when they are unrestricted, and then calculate how much I need to block off the vents to achieve this.
I am trying to find a resource to help me model the airflow in a vertical bathroom exhaust stack serviced by a rooftop fan, with seven floors, each with two bathrooms. I am assuming that there is an integral that could be used to describe the rate of flow at each floor, but I am having trouble...
