![]() Afterall, you could just put up a big flat sheet of filter media and it would work just fine. ![]() That ends up with a media of a certain mesh or pore size and a certain area.īut there are often space limitations so you sometimes need to figure out how to get as much area to meet your flow requirements into a small envelope. So you pick a media that gives you the dirt filtering performance you want and the correct air flow over a estimated life for the filter. You then oversize it a bit because as it traps dirt, it will begin to plug off some of the ports and hence reduce the flow thru the filter. So when you design an air filter, you need to know the max flow thru the filter. ![]() The smaller the pores the smaller the dirt particles kept out. If you use the same filter media and increase or decrease the total area, your flow will change in direct proportion to the change in area.Ī filter's purpose is to let air thru and keep dirt out. The flow thru a filter is dependent on the size of the pores in the media also referred to as mesh, the number of those pores in a given area and the total area of the filter. Let me give you a long answer to a short question so you know why I say foam filters suck.
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