AC Infinity 4" XL Charcoal Filter 300 CFM

High-airflow duct filter designed to eliminate odors and chemicals, utilizing a premium-grade Australian Virgin charcoal bed. This activated carbon bed has RC412 pore sizes that enable a high adsorption rate and longer life rating. Its heavy-duty construction features aluminum flanges and dual-sided galvanized steel mesh with a rust-resistant gunmetal finish to stand up to corrosion and high humidity. The carbon filter can be used with an inline duct fan for use in intake and exhaust configurations, while its flanges can be reversed to further prolong its lifespan. Includes two machine-washable pre-filter cloths to prevent carbon residue and two hanging straps for easy installation.