My Customized Parametric Golden Spiral Fan Duct v0.12

thingiverse

This personalized design is based on Thingiverse's item number 236144, which you can customize using the Customizer app (http://www.thingiverse.com/apps/customizer/run?thing_id=236144). For printing, set layer height to .5, screw diameter at 2.8, perimeter extrusion width as .5, screw distance at 32, fan diameter to 38, ball radius to 5, mount height at 8, mount side length to 40, phi equal to 0.618034, $fn set to 24, corner radius at 6, scale factor as 10, fins numbered at 6, ball inset at .8, direction as -1, wall thickness of 1.5, duct height at 30. Enjoy!