Camfil Camfil Dual 9 Pleated Filter DUAL 9 SETS A NEW STANDARD IN THE AIR FILTRATION INDUSTRY LONG lifespan, HIGH energy efficiency, LOW maintenance costs, LESS waste Home or business owners: Are you tired of changing air filters frequently? Are you sick of spending money every month on... MSRP: Was: Now: $155.00 - $403.00 Choose Options