Active Carbon filter designed for a Sharp Plasmacluster Air Purifier with humidifying function for large rooms (FZC150DFU) Active Carbon filter designed for a Sharp Plasmacluster Air Purifier with humidifying function for large rooms (FZC150DFU) Carbon-based filter designed to remove common household odors including smoke, cooking odors, and pet odors and VOCs Filter captures larger particles from the air, including pet hair and dander, extending the life of the Tru HEPA filter Filters are properly sealed to protect usage Recommended is every 5 years