Don't let unwanted air pollutents get in your grow room! • Eliminates 98% of all insects, molds, mildews, spores, pollen, dust, dander and other airborne particles down to 0.3 microns using the MERV 13 filter. • Keeps glass lenses dust and bug free. • Replaceable, economic, disposable filters. • Accepts standard 10'' duct. • Use the charcoal filter on exhaust ducts. Adaptable to any duct/filtering system. • Easy to install, easy to use, easy to maintain. • Replaceable high-flow carbon filters. • 100% premium virgin oconut charcoal. 100% of the filter surface area is used. • For comerial or residential applications.