hvacnerd
Mechanical
- Mar 25, 2005
- 10
We are designing an exhaust system that requires fire sprinklers in the duct including the discharge stack. The fire marshall is concerned that the high velocity in the duct will blow the water up the stack and out. Does anyone know what velocity it would take to blow water up the stack? I have searched the internet, talked to fan sales reps and sprinkler reps and nobody has ever had a problem like this. Any input would be greatly appreciated.