The Duct Carbon Filter (12-inch) was created to keep the air clean and odorless in grow tents and hydroponic growing configurations. Featuring premium-grade Australian charcoal for higher absorption rates and longevity, this filter manages to eliminate even the smelliest chemicals notes from the room. Built with a structure of heavy-duty aluminum flanges and galvanized steel meshing, it was made to last a very long time. Highly efficient for air circulation, it allows airflow to run smoothly for both intake and exhaust configurations. The 38 mm thick charcoal bed has a high absorption rate, and when used in conjunction with AC Infinity Duct Fans ensure an optimal air passage for a longer time.With a lifespan extended by 33% compared to standard filters, the Duct Carbon Filter is everything and more.