A Rear Door Heat Exchanger is a cooling device mounted at the rear exit of server racks to intercept and remove hot air before it enters the general data center environment. This technology captures exhaust air at temperatures between 95-115°F and cools it using chilled water loops or refrigerant circuits. Rear Door Heat Exchangers achieve approximately 50-80% of heat removal at the rack level.
Technical Specifications
These units typically handle 20-40 kW of heat per rack and operate with water inlet temperatures of 50-60°F for optimal performance. They integrate with existing raised-floor infrastructure and require minimal installation modifications. Most designs feature aluminum or copper fins with variable-speed fan controls that adjust to server thermal output fluctuations.
Implementation Benefits
Rear Door Heat Exchangers extend the operational life of centralized cooling systems and reduce chiller workload by 30-50%. This approach supports higher server density without expanding primary HVAC infrastructure. The technology proves especially valuable in retrofit scenarios where expanding data center cooling capacity would be expensive or physically impossible.