Combi filters come in baffle, mesh, activated carbon and zeolite variants, and are typically used in commercial kitchen hoods. Depending on their component parts, they are ideal for filtering grease particles, vapors, oil mists or unpleasant odors in the food preparation industry. They can also be used in industrial processes in general. These filters are installed at an angle, generally 45° to 60°, to allow grease to drain into the hood’s collection channel.