P1S Internal Hepa Filter Design

Hi,
I have a novel HEPA/carbon filter concept that has not been done but should work quite effectively.

I propose an internal HEPA filter using a slide in fixture to locate the filter over the vent

This will enable stock carbon filter to be retained, and the sequence of filtration will prevent the HEPA being clogged with carbon particulate.

I am interested in finding a more skilled designer to collaborate with me.

I’m in Australia but flexible in hours to get on Skype or teams etc to discuss and work on it.

Keep me updated.
My fan doesnt exhaust air, its sucking in somehow. Tested with smoke. When i remove lid its working properly

Do you mean sucking air down into the carbon filter and out the back of the fan? That is what it is meant to do yes?