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FCU is a fan and coil unit. which used for the small serving area controlled by the guest or end-user.
AHU was a large unit used for large serving location to obtain temperature sooner with effective power low power consumption.
The only difference is CAPPACITY.
For lower and higher capacities we use FCU & AHU respectively.
FCU (Fan Coil Unit) treats the indoor load . it provides the treated air into the room.
AHU (Air handling unit) is similar with FCU in function but it is used usually for high capacity.
FAHU (Fresh Air Handling Unit) handles fresh air load and provide the treated air to the FCU's or AHU's.
FCU-FAN COIL UNIT
AHU-AIR HANDLING UNIT
