powered air supply to 3M mask connector

You need the "Nuts and Bolts v1.95" OpenSCAD library if you are going to use OpenSCAD to customize the original design:
https://www.thingiverse.com/thing:965737

I bought an "Electric Constant Flow Air Mask" because I wanted a way to send filtered air to a 3M respiratory faceshield.

This is an adaptor to connect the two.

This version uses small ribs and is press fitted on the 3M faceshield intake. I might make one that uses an o-ring instead if the original gets loose after some use.