I made an exhaust vent cover used on a DIY BOFA filter unit used for laser engraving. This cover directs the exhaust air from the filter unit down, based on the direction it is installed.

This was made to fin a Dayton 1TDR3 Model Blower Motor, it may fit other similar models.

Dayton 1TDR3 Model Blower Motor: https://amzn.to/4a00uPq  (As an Amazon Associate I earn from qualifying purchases)