Tony,
If you plan on replacing it that often, I would go with any filter "off
the shelf." What I would do is find some BIG furnace filters at the
orange (or blue) Borg and cut them down to the size you need. That way
you can get about 6 or 12 filters for the cost of one. Just make the
filter opening able to handle the filters after they are cut.
Or, you can get some "washable" furnace filters and just have two on hand.
One clean and one in use. Switch them and clean the other one. Repeat.
Hope this helps.
BTW, I think that automotive filters will be too restrictive for normal
rack fans.
Moose
"Be as beneficent as the sun or the sea, but if your rights as a rational
being are trenched on, die on the first inch of your territory." Ralph
Waldo Emerson
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