Close Coupled Air Conditioners
Vertiv™ Liebert® DS and DSE
Modular perimeter cooling, 35–105kW, with an optional DSE pumped-refrigerant economizer coil for water-free free-cooling.

Solution overview
Modular cooling that scales with the room, with free-cooling built in
Liebert® DS is a modular data center cooling system offered in upflow and downflow models from 35kW to 105kW (10 to 30 tons), in air-cooled, water/glycol-cooled, dual-cool and GLYCOOL™ economizer configurations.
Liebert® DSE adds a pumped refrigerant economizer coil to the same platform: it uses no water and no outside air for economization, so there is nothing to treat, filter or contaminate the space, and no dampers or louvers to maintain.
- 35kW, 42kW, 53kW, 70kW, 77kW and 105kW capacities, upflow or downflow
- Air-cooled, water/glycol-cooled, dual-cool (compressorized plus chilled water) and GLYCOOL™ economizer coil options
- DSE pumped refrigerant economizer: up to 50% more efficient than a legacy solution, with no water usage
- Modular frame with front service access and multiple compressor and fan options
- Liebert® iCOM™ thermal system control across the unit
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