XPOWER AP-2500D Air Purification System CF50-595 Optional Activated Carbon FilterXPOWER Optional Activated Carbon Filter for XPOWER AP 2500D Air Purification System The optional CF35 595 Activated Carbon Filter equips the AP 2500D Portable HEPA Air Purification Systems to capture a wide variety of volatile organic compounds (VOCs), including soot and smoke, food odors, fumes from paint and paint thinners, sewer odors, and many other compounds. XPOWER CF50 595 Features Captures a wide variety of volatile organic compounds (VOCs)