Unknown Domain

Parts: Filters

I have been brain storming which filter materials to use, the obvious thing to do is use what ever eSpares say is the most common part or their universal filters, however more ‘ghetto’ approaches would include car filters, furnace filters, coffee filters, etc… I am not sure how I would test the effectiveness of these.┬áSome people have suggested measuring a pile of flour onto the floor, vacuuming it up, and then seeing how much more the vacuum cleaner weighs after. This would show if its all in the air, or in the vacuum cleaner.