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Flow loss due to friction in galvanized steel duct
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...- Swanny76
- Thread
- Replies: 6
- Forum: HVAC/R engineering
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Help with modeling bathroom exhaust airflow
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.- Swanny76
- Post #4
- Forum: HVAC/R engineering
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Help with modeling bathroom exhaust airflow
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...- Swanny76
- Thread
- Replies: 6
- Forum: HVAC/R engineering
