Air Box Junior Intake HEPA, eliminates 98% of all airborne particles down to 0.3 microns using the MERV 13 filter. The Air Box Junior HEPA-MERV 13 has replaceable, economical and disposable filters. It accepts a standard 10″ duct. Can be easily hung by using 1/4″ rope, chain, cable or ratchets. It is easy to install, easy to use, easy to maintain and adaptable to any duct/ filtering system. Made in USA for residential, commercial and industrial applications.