Liebert DSE Free-Cooling Economization System, 50-250kW

Reduce costs and increase economization hours with the highly efficient Liebert DSE Packaged Free-Cooling Solution. The Liebert DSE is the world’s most widely deployed pumped refrigerant economization system for data centers, with over 6,000 installations. It provides:
• Highly efficient, with PUEs under 1.20
• Low total cost of ownership
• Maximum economization hours across the widest temperature range
• Elimination of outside air contamination
• Smooth transitions between economization phases


  • Pumped Refrigerant Economizer
  • Advanced Thermal Controls
  • Microchannel Condenser
  • Independent Thermal System Design
  • 50-250kW capacities
  • Upflow and downflow configurations (50kW unit with downflow only)  


  • Minimizes compressor use to maximize free cooling
  • Eliminates need for bringing outside air and contanimants into the data center
  • Eliminates water usage, no costly water treatment required
  • Auto-economization increases the number of free-cooling hours throughout the year
  • No dampers and louvers to maintain
  • Industry-best condenser efficiency
  • N+1 thermal redundancy
  • Capacity can easily be scaled without affecting the rest of the cooling infrastructure, while maintaining desired redundancy
  • Lower refrigerant charge than traditional DX systems

Product Manuals

    Additional Models