xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"
the ratio of the reference annual heating demand QH and the active mode coefficient of performance SCOPon or active mode primary energy ratio SPERon ; and
the energy consumption for off, thermostat-off, standby, and crankcase heater mode during the heating season.