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Air Duct

Air Duct

Air Duct

(OP)
I need some help in a duct system I am building.
I have 8 drilling machines. the total duct and hose is going to be less than 100'.
First the duct is going in a straigth direction to all the machines, then a hose is connected to the duct to each of the machines.
the hose we have is 10' in length and 4" diameter, so I have a total of 8 machines with 8 hoses (10' and 4"), and a duct length of 87'.
Do you think the fan (Diameter of Blade of 18" and it has CFM of 4671 with 0.0" Static Pressure and 2163 CFM with static pressure 1")I have would do the job???
thanks for you help again.
What diameters would be the most efficient in the duct. I was thinking 18" to 16" to 14", and where each machine is connect a hose of 4" to where the air has to be extracted.
please feel free to give me any ideas of help you may have. thanks

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