The traditional carbon filters are special plastic containers that contain grains of activated carbon that can trap and bind grease and odors. These filters should be replaced regularly every three or four months. While using recirculation, windows and doors, and any air system with access to fresh air should be closed. Consumption of filter T-Shape Star: 1 pcs. EicoE26 P 60 N 1 pcs. EicoE26 P 90 N 1 pcs.