Barrel Series CARBON Filter cartridges Barrel Series carbon filter cartridges have many applications. Our Mission is always to get rid of odors or harmful gases in the air inlet and / or outlet. Our carbon filter cartridges are successfully applied: airports, clean rooms, hospitals, data center, industrial kitchens, farm, museums, archives, and offices. In industry it is often a question of ridding the exhaust air of harmful gases. The Environmental Nuisance Act is often in force for these types of applications