Paper filters remove 99% of 1 micron particles, whereas polyurethane filters remove 98% of 10 micron particles. Polyurethane elements can usually be cleaned and reused 4 to 8 times before the pores close or tear. Pressure drop indicators tell you exactly when it’s time to change your elements. Select a filter housing with a connection size at least as large as your blower’s inlet connection insure design efficiency.
Stock housings include one paper filter element. All housings of a given size will accept any of the three types of filter elements for that size.