A Central Plant is a centralized mechanical facility that generates heating, cooling, or both for distribution throughout a building or campus. Rather than having individual units in each space, central plants house large-capacity equipment that produces conditioned water or steam for delivery via piping networks to multiple zones.
Technical Details
Central plants typically include chillers (50 to 5,000+ tons), boilers (100,000 to 50,000,000 BTU/h), cooling towers, pumps, and associated controls. Systems operate at higher efficiencies than distributed equipment due to load diversity and optimized equipment sizing. Most facilities maintain chilled water at 42 to 48 degrees Fahrenheit and hot water at 160 to 180 degrees Fahrenheit.
Advantages and Applications
Central plants serve commercial buildings, universities, hospitals, and industrial facilities with multiple zones. Key benefits include reduced equipment redundancy, easier maintenance access, superior part-load efficiency, and simplified control coordination. Energy costs can be 20 to 40 percent lower than comparable distributed systems, though initial installation requires significant capital investment and comprehensive piping infrastructure.