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 36 months, 2 to 3 times longer than other filters. Removes ALL odors. Don't forget to filter your incoming air with Mountain Air Activated Carbon Filters. They will remove most incoming mold spores as well. 3 year real time tested Ranked #1 6 consecutive years