Liebert DSE Freecooling System, 400kW, Rooftop

The Liebert EFC Indirect Evaporative Freecooling System is a highly reliable and efficient cooling system for colocation, cloud hosting and other large data centers. It combines a highly efficient heat exchanger with advanced controls to help customers save money, reduce risks and simplify thermal management. The Liebert EFC provides low peak power usage, a rapidly scalable design, and advanced controls for operational efficiency and automated protection routines.


  • High capacity 400 kW unit at 65,000 CFM
  • Highly efficient pumped refrigerant economizer
  • Advanced monitoring and control
  • Large condenser surface area to minimize operating and peakpower
  • No dampers to service or outside air filters to replace
  • All components can be serviced from the end of the unit
  • Thermal break construction keeps air from leaking
  • 3 airflow configurations
  • Reduced weight and footprint


Saves You Money

  • High-efficiency, with an operational PUE under 1.2
  • Eliminates water usage, cost and treatment
  • Low maximum kW to allow downsizing of backup generator capacity or more IT power for sale
  • No air leakage or volumetric displacement, eliminating the need for additional fan power ormake-up air capacity
  • Highly efficient in low load / part load conditionsMakes You Money
  • Rapidly scalable for faster deployment and time to market
  • Low operating costs for higher profitabilityLowers Your Risks
  • Proven pumped refrigerant economization technology used in more than 4,500 installations worldwide
  • Multiple fans, DX circuits and other key components for ride-throughSimplifies Thermal Management
  • Advanced controls that automatically manage unit lead/lag, protect against coil freeze, maximize economization and other routines