Advice needed re dust collector duct size
Moved and setting up shop.
Need advice on size of duct for my Jet JCDC-3 dust collector. 3 hp. 230 volt. Single phase. Specs say the air flow – with filters installed – is 1240 CFM, air velocity is 3542 FPM. Has an 8 inch inlet.
Note – my ceiling height is 9 ft 9 inches.
My hope – and hence my questions – can I
a. start out with 8 inch duct pipe going (approx. 10 ft) from the DC up at an angle to ceiling and then, at the ceiling, turn 90 degrees,
b. and then reduce to 6 inch duct and go across the ceiling (approx. 17 ft),
c. with 5 drops to individual machines (approx. 7 to 9 ft counting elbows into machine)
d. Each drop to a machine would be a 4 inch duct, which is the port size of each machine.
OR should I, at the DC outlet reduce from 8 inch to 6 inch duct the full length of my trunk line (up and across the ceiling, totaling approx. 27 ft) with each drop to a machine using 4 inch ducts.
Any other sources I should ask these questions???
Alan – planesaw