7.5" Circular Air Filter Base

If this design is useful for you, please like it and consider following me for more updates.

This is an air filter base to mount to a 4" air duct system, please see the flange mount, ducting, and fan holder in my other designs.

It will require two bungee cords or elastic straps to attach to the four mounting holes on the four mounting tabs, especially if using in a positive pressure environment, otherwise, the vacuum and press-fit may be sufficient.

The filter used in this design is for a 5 Gallon Shop-Vac disposable filter, similar to this https://www.lowes.com/pd/Shop-Vac-Reusable-Dry-Large-Shop-Vacuum-Cartridge-Filter/1114991

Wrapping the filter with a carbon sleeve similar to this https://www.mcmaster.com/8997T63/ provides some additional protection.

Consider making a box for the assembly and venting to the atmosphere.

It has a 4" diameter hole with 4 each #10 screw holes, 5 inches on center to attach to a wall or otherwise.