The Ditto Concealed Modular (MAY/MBY) fan coil system is designed for installations where two units share riser piping in the separation wall between two rooms but are equipped with individual valves, supply and return grilles, and controls. The Ditto Concealed Modular is shipped factory assembles for additional installed cost savings. Standard Ditto unit are provided with a galvanized finish on the cabinet and a powder-coat paint finish on the return air panel.