Quote from: crumbs on September 08, 2013, 10:51:12 PM

Quote from: The Avenger on September 08, 2013, 10:34:39 PM

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Is this material the same as a furnace filter?

The automotive stuff is really restrictive -- do not want.

Do an image search for "air conditioner foam filter" -- this stuff's really cheap & you can wash it & reuse it. Most HW stores carry it. Needs a screen/grill over the fan's intake (those old-skool wire ones are cheap & good), and then simply cut a rectangle slightly oversize & tape edges right to the case (or sandwich between two grills if you wanna be racy).

The furnace filters are big (as in a couple of feet), usually disposable HVAC filters that you can cut up and use -- also really cheap but more of a pain.

Cool. I'll check this stuff out.

The "box with fans" photo a while back, the inlet fans appear to be bequiet 140mm Silent Wings (as they have 9 blades). So I guess some kind of 140mm grill + even bigger filter would do the trick.