Horizon O2+ Air Purifier Replacement Filter PHZF-21

4-in-1 COMPOSITE FILTER: The Horizon’s composite filter combines 4 filtration layers – the Pre-filter layers capture particles while the Granulated Carbon and Cold Catalyst layers filter VOCs and other harmful gases. FILTRATION: Captures pollen, dust and 99.97% of particles above 0.3 microns in size. GRANULATED CARBON: Traps odors, harmful gases, VOCs, and decomposes formaldehyde.The unique honeycomb structure is designed for maximum coverage and powerful odor elimination. FILTER LIFE INDICATOR: Simple LED reminder lets you know when it’s time to switch to a new filter. EASY FILTER : The single 4-in-1 filter makes filter replacement quick and easy. For use with Horizon P200 only.