This is the MultiGas filter for the GC air purifier. This set of four cylindrical GC Multigas cartridges (F2) control a wide range or specific chemical substances and odors. Consists of 12 lbs. (5.4 kg) granular activated carbon and impregnated alumina (AC/4 + IA/4). Average filter life is approximately 2 years and 5 months (based on average daily usage of 10h on speed 3). Filter life can vary based on actual usage and pollution levels.
