This all-in-one filter system helps combat cooking and cleaning odours, and reduces airborne VOCs such as ammonia, acetone and formaldehyde. In addition, the HEPA filter captures 99.97% of common pollutants in the air.This combination filter has 3 levels of filtration to defend against odours and VOCs in the air; a durable mesh pre-filter, a 3-layer carbon pellet filter and a HEPA filter. The filter drum is at the core of purifying your air. This replacement HEPA filter featuring a 3-layer carbon pellet filter that surrounds the HEPA filter offers unrivalled performance against odours and VOCs. This filter helps combat cooking and cleaning odours and reduces airborne VOCs with 360-degree filtration drawing in air from all directions, collecting microscopic particles, allergens, VOCs, pollen and dust.The indicator light glows red on the air purifier when the filter needs to be replaced, for best results it's recommended to replace the odour and VOC filter drum every 12 monthsPack includes: 1 x Mesh Prefilter, 1 x Carbon Filter, 1 x HEPA filterCompatible with the Leitz TruSens Z-3000 & Z-3500 Air Purifiers.