Under the same total power operating condition, An all-in-one unit typically consumes less energy than multiple separate devices.

Lower pipeline/line losses
In split‑type systems, each unit has its own independent wiring and piping, resulting in longer pipelines and more connections, which lead to greater fluid and electrical transmission losses. In contrast, integrated whole‑unit systems feature shorter piping and wiring, reducing thermal and electrical losses.
Concentrated heat dissipation / Higher heat exchange efficiency
The entire system shares a single cooling and heat‑exchange subsystem, enabling unified temperature control and eliminating redundant cooling from multiple standalone units. In contrast, separate modular units each have their own dedicated cooling fans and heat exchangers, leading to cumulative no‑load power losses.
Improved control and load matching
The entire system employs unified variable-frequency control and coordinated regulation to deliver power on demand; in contrast, multiple split units that are started and stopped independently incur compounded energy losses from frequent startups and no‑load standby, resulting in significant waste of excess capacity.
The only exception
When the equipment operates at a low load for an extended period and only one split unit is needed, the entire system still has to run; in this case, operating a single split unit alone is more energy‑efficient.