The seasonal coefficient of performance SCOP or seasonal primary energy ratio SPER shall be calculated as the ratio of the reference annual heat demand QH and the annual energy consumption QHE.
Sesoonne soojustegur SCOP (või sesoonne primaarenergiategur SPER) arvutatakse aasta võrdlussoojusenergia QH ja aastase energiatarbimise QHE suhtena.