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ERF - STULZ answers

The Energy Reuse Factor (ERF) reflects the ratio of the data centre’s recycled energy to the data centre’s total power consumption, but the energy is reused in a different place (outside the DC). Example: Residual heat from the cooling is used to heat office buildings.

The value varies between 0 and 1. If the value is '0', this means that no energy has been reused.

ERF = EReuse / ETotal

There are several variables that affect the outcome of the above calculation. These include infrastructure (lighting, cooling, UPS and everything that contributes to a safe operation) and IT load.

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