This combination filter drum has three levels of filtration. Designed to defend against flu viruses and pollutants in the air, it features a durable mesh pre-filter, an anti-viral HEPA filter and an activated carbon pellet filter. The filter drum is at the core of purifying the air as it captures 99.97% of airborne allergens and viruses, including the H1N1 virus. Compatible with all Leitz TruSens Z-3000 / Z-3500 Large air purifiers.

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