The Concealed Modular (SPY) fan coil unit, IEC's premier Modular unit, is designed for concealed applications in corners or along room walls. Once installed, only the thermostat control, supply grille and decorative return air panel of the SPY are visible in the room. The return air panel provides easy access to all internal components. Standard SPY units are provided with a galvanized finish on the cabinet and a powder-coat paint finish on the return air panel.