Cartridge-type
Centrifugal pump
Check valve
Companion flange
Cutter mechanism
Compressor
Condenser
Condensation
Circulating pump
Cooler
Control
Control panel
Coefficient of performance
Central air conditioning system
City gas
Corrosion
Corrosion inhibiter
Closed circulating system
Chemical-feeding
Chemical feed pump
Capacity
Capacity control
Cooling
Cooling water
Cooling-water pump
Cooling tower
Chilled water
Cooling
Cooling load