I think this is a cool project idea, but I would not use this as a primary means to filter air unless you can't afford a proper hepa filter unit and you happen

I think this is a cool project idea, but I would not use this as a primary means to filter air unless you can't afford a proper hepa filter unit and you happen to have parts laying around to cobble this together. Smoke and mold are dangerous to breath and you only get one life. This is probably a good way to augment your existing filters, in my opinion.