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[EnergyPlus_Support] Heating Seasonal Performance Factor



On page 640 of "EnergyPlus - Engineering Reference":
Heating Seasonal Performance Factor (HSPF) is defined as the total space heating required during the space heating season, divided by the total electrical energy consumed by the heat pump system during the same season.

It seems that the HSPF of a heat pump depends on the weather data. In fact I tried to simulate the same model with two different weather files and the Heating Seasonal Performance Factors have changed. Sometimes ASHRAE 90-1:2007 expresses limits as HSPF values (e.g. in table 6.8.1B). Does it mean that the same heat pump could respect the ASHRAE's limit in a climatic context and it could not respect it in another context? It sounds strange.
Regards



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