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These are reasonably complex shapes. I recommend printing at .16mm and slow your print speed to 50.

Print all the Ducts with the front face down flat on the print bed. Print the Base with the back side (that connects to the X gantry mount) down on the build plate.

This will give you the best results, strongest parts, and use the least amount of supports (but you DO NEED SUPPORTS).

For all the parts that do need supports, use "Touching Build Plate" only. You do not want supports inside the fan ducts or base.

Resolution: .16mm
Infill: 35%
Speed: 50

Attached is a screen shot of the support settings I use in Simplify3D.