The home supply store should have in several locations:
Shop and household Vacuum filter replacements
Furnace filter replacements
Air purifier (recirculating) filter replacements.

On 6/12/2011 11:21 PM, V G wrote:
> Hey all,
>
> I'm considering putting together a very simple HEPA filter air purifier f=
or
> my apartment. Just a simple fan and filter design. Nothing fancy. Cheap a=
s
> possible.
>
> Does anyone know where I can get cheap large HEPA filters?
>
> At the very least, I want some so I can cut them to shape and stick them =
on
> to the exhaust of my vacuum cleaner.
>   =20
--=20
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