MMY/MSY Primary/Secondary Modular Vertical Stack Fan Coil Series

The Primary/Secondary Modular (MMY/MSY) fan coil unit is ideal for applications where design restricts the installation of IEC’s Ditto Modular fan coil units (MAY/MBY). With this configuration, field brazing is required to complete the piping between two separate Modular Vertical Stack fan coil units. Standard MMY/MSY fan coil units are provided with a galvanized finish on the cabinet and a powder-coat paint finish on the return air panel.


  • 300-1200 CFM
  • Double-deflection supply grille
  • Integral return air panel
  • Unit-mounted thermostat control
  • Provided with powder-coat paint finish on the return air panel
  • Shipped factory assembled with risers installed
  • Upgrade to an energy efficient EC Motor with quiet operation


  • Application fit — fan coil units are specifically designed for quiet operation
  • Ease of installation — fan coil units assembled at the factory in coordination with the jobsite construction schedule
  • Ease of service — filters are easily accessible by removing return air panel
  • Quality and safety — every fan coil unit is tested and inspected at the factory for trouble free start-up

International Environmental Corporation

5000 W. I-40 Service Road

Oklahoma City, OK 73106


Learn more about other Climate Control Group companies

CCG | ClimateCraft | ClimateMaster | ClimaCool

© International Environmental Corporation (IEC). All rights reserved 2024