| Baffle grease filter | Stainless steel or aluminum | Commercial kitchen exhaust hoods | Angled baffles redirect airflow so grease droplets collect on the filter surfaces and drain into a collection channel. | Usually removable and washable. Cleaning frequency depends on cooking volume and local fire and maintenance requirements. | Panel dimensions, baffle direction, frame style, material thickness, and finish |
| Mesh grease filter | Aluminum, stainless steel, or layered metal mesh | Residential cooker hoods and some light-duty ventilation systems | Multiple mesh layers capture some airborne grease as cooking exhaust passes through. | Many metal versions can be washed; inspect for damage and replace when cleaning no longer restores performance. | Panel size, mesh layers, frame material, and edge construction |
| Activated carbon filter | Activated carbon in a pad, cartridge, or molded panel | Recirculating residential cooker hoods | Porous carbon adsorbs some cooking odors from air returned to the room. It is generally not a substitute for grease filtration. | Commonly replaced rather than washed; service life varies with use and product design. | Shape, cartridge size, carbon quantity, and mounting method |
| Combination grease-and-carbon filter | Metal or synthetic support with an activated-carbon layer | Selected recirculating cooker hood models | Combines particulate or grease pre-filtration with odor adsorption in one assembly. | Cleaning or replacement depends on the construction; carbon media is typically replaced when its odor-control performance declines. | Layer arrangement, dimensions, media type, and attachment points |
| Electrostatic precipitator cell | Metal collector plates and electrical components | Some commercial kitchen exhaust systems | Uses an electric field to charge and collect fine airborne particles; system design and maintenance affect performance. | Requires regular cleaning and inspection according to the equipment instructions. | Cell dimensions, voltage configuration, airflow capacity, and system connection |
| HEPA or fine-particle filter | Fine-fiber media, often supported by a rigid frame | Specialized air-cleaning or recirculation applications, usually downstream of grease filtration | Captures fine particles when used in a system designed to provide suitable airflow and sealing. | Typically replaced when loaded; it is not generally used as the primary grease filter in a kitchen hood. | Filter grade, frame size, gasket, and airflow design |