Originally Posted By: rslifkin
The only reason I'd consider the slits worrying is if we start seeing filters that use them where they aren't punched open as far (which would reduce total flow area).
+1 ... if anyone buys filters with the louvered center tube, best to inspect the slit openings before buying to ensure they are opened up pretty good.
The only reason I'd consider the slits worrying is if we start seeing filters that use them where they aren't punched open as far (which would reduce total flow area).
+1 ... if anyone buys filters with the louvered center tube, best to inspect the slit openings before buying to ensure they are opened up pretty good.