>
> I've never run into this problem because by the time the filter gets
> so bad that it can't be cleaned, the fan usually needs to be replaced
> too, and one can usually find fan guards with filters from the same
> places one buys a fan from.
>
> Qualtek is one company that sells them, I found some at Digikey:
> http://dkc3.digikey.com/PDF/T073/2138.pdf
> Near the bottom, "filter media".  They seem to have other sizes if you
> search the digikey website for "fan" and then filter the search
> results by "Replacement Filter Element"
>
> I imagine you can find similar results in mail order place more
> convenient to you.
>
> I suspect the fish filter ones can be used as well, but they may not
> work as well (or may work too well and clog too frequently) so I'm not
> sure.
>
> I know some people cut regular furnace filters up for this
> application, and flatten them a bit to fit as well.
>



Thanks for all the replys,  time some leg work.

Ling SM
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