My desk sits close to the kitchen table.
There is just my wife and I so I have the HAF under the unused end of the kitchen table.
The table catches any dust from above.
You just gave me a great idea for a better side filter. I have some real small rare earth magnets. Super strong.
Black cloth side filter. I think they call it gauze.
Almost see through but finer tighter thread than a single layer of medical gauze.
Just need it in black.
Side panel fan has a bubble circle outward so 4 magnets should work well.
Front fan cover is plastic so I may have to be more creative on attachment.
Use same black material will blend right in.
Just figure out the attachment.
This should be fine enough. Of course I'll buy it local.
Island Breeze Gauze Fabric - Discount Designer Fabric - Fabric.com
Click the pic and you can see air will pass but should act as a good filter.