Mountain Air Activated Carbon Filters remove 99% of everything under 20 microns from the air in one pass. This includes all organic odors. Some of the uses of these superior air cleaners are: food processing, indoor growing, restaurants, mortuaries, or anywhere odors and air quality are an issue. Effective up to 3 years, 2 to 3 times longer than other filters. Removes all organic odors. Don’t forget to filter your incoming air with Mountain Air Activated Carbon Filters. They will remove most incoming mold spores as well.