air box project

I need an engineer who understands air flow.I am using Asmall blower 12v DC to draw air through A heppa filter into A small [login to view URL] filtered air will replace the polluted ambient air with clean [login to view URL] variables to optain the proper flow are;shape of prop on blower ,fan speed,and diffuser that controls air distributation .My patent calls for an air flow system that best replaces polluted air with clean filtered air'. we believe we can attain this by using A variable speed blower and adjustable openings on our our diffuser . We need to be able to generate different air flow iterations for different combinations of our variables. Regards Jim Breen