Customized version of https://www.thingiverse.com/thing:735038

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=735038

Using the following options:

t_wall = 3
d_fan1 = 40
ls_fan1 = 32
ds_fan1 = 3.4
d_fan2 = 40
ls_fan2 = 32
ds_fan2 = 3.4
l_mani1 = 5
a_cone = 130
a_mani = 45
az_mani = 0
n_pipe = 1
n_angle = 0.501
$fn = 50