TruSens Z6000 HEPA Filter Replacement Performance Series Air Purifier 2 PackDescriptionSpecificationsShipping The filter is at the core of purifying your air and replacing it is essential for optimal air purifier performance. The dual sided filters are comprised of a True HEPA filter with highly efficient Activated Carbon honeycomb granules The Activated Carbon Filter captures volatile organic compounds (VOCs) For best results, replace the filter every 12 months depending on usage A change indicator light is displayed on the