From the beginning of 2006 all new European buildings (residential, commercial, industrial etc.) musthave an energy declaration based on the calculated energy performance of the building, includingheating, ventilating, cooling and lighting systems. This energy declaration must refer to the primaryenergy or CO2 emissions. The European Organization for Standardization (CEN) has prepared aseries of standards for energy performance calculations for buildings and systems.This paper presents related standards for heating systems.
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