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Last edited 16 Dec 2020
Seasonal performance factor
Seasonal performance factor (SPF) is a: ‘…measure of the operating performance of an electric heat pump over the season. It is the ratio of the heat delivered to the total electrical energy supplied over the season, but there are up to seven different ways to draw the system boundaries. For example, SPFH2 excludes auxiliary resistance heating while SPFH4 includes it – making a large difference.’
Ref Non-domestic Building Services Compliance Guide For Scotland, 2015 Edition v1.1, published by the Scottish Government, Building Standards Division in April 2018.
See also: Coefficient of performance.
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