Filter kit includes one pleated pre-filter, and one carbon odor filter.
Year's supply includes four pleated pre-filters and four carbon odor filters.
Please note that these filters ONLY fit the Fantech DM3000P HEPA Filtration System. If you do not have a Fantech DM3000P HEPA Filtration System, do not order this product!
(Recommend pre-filter kit change every 3 months. Check more often for dirty environments.)