In-line duct fan mixing box

cults3d

I made this to be used with an in-line duct fan like this one... https://www.amazon.com/VIVOHOME-Plastic-Exhaust-Hydroponics-Ventilation/dp/B078HFVTYX/ It can be used on either end. To distribute air or to collect air and direct it outside or to a carbon filter. Here are the variables in the SCAD file where you can customize it for your application. // Which part would you like to see? part = "5";// [1:Box,2:Cover,3:Damper,4:Filter ring,5:Everything but Cover,6:Everything] Supply_duct=95.5;// OD of supply duct Drops=64.2;// ID of drop ducts to connect on the outside (if you use 2-1/4" shop vac hose that connects in the inside, use 58mm plus 2 times the wall thickess) Collar_height=20;// Height of supply duct connector plus filter ring depth (if used) Wall_thickness=3.1;// Box and cover wall thickness Damper_screw_hole_size=4; Vane_thickness=1.2;// At leading edges Cover_screw_hole_size=4; Number_of_ducts=4;// [1,2,3,4] //Pre-filter (use bulk filter media cut to size) Filter_ring_depth=10; Filter_ring_thickness=1.5;