Last edited 28 Dec 2020


An optimiser is a control system employing an optimum start algorithm.

Optimum start is: ‘…a control system or algorithm which starts plant operation at the latest time possible to achieve specified conditions at the start of the occupancy period.’

Optimum stop is: ‘…a control system or algorithm which stops plant operation at the earliest possible time such that internal conditions will not deteriorate beyond preset limits by the end of the occupancy period.’

Ref Non-domestic Building Services Compliance Guide For Scotland, 2015 Edition v1.1, published by the Scottish Government, Building Standards Division in April 2018.

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