LG’s Multi F Ceiling-Concealed Duct (Low Static) indoor units are designed for low-static pressure applications up to 0.16"WG. With a maximum height of 7-1/2 inches, these units can be mounted fully concealed above a finished ceiling with as little as 8 inches of vertical space. Casing is manufactured of galvanized steel plate, and includes hanger brackets for installation. The removable and washable filter is accessible from the rear of the unit. Each indoor unit includes its own LG-supplied wired controller