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Heating degree days

Figure Created 29 Oct 2021 Published 20 Jan 2022 Last modified 20 Jan 2022
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The heating degree days index represents a proxy for the use of energy required for heating buildings. It is computed from the outdoor air temperature as the cumulated daily deviation from a base temperature threshold from October to March (see the ETC-CCA Technical Paper for details). The temperature threshold, period and formulation can vary according to the local climate and applications. A base temperature of 15.5 °C is considered here as representative for the pan-European scale and daily minimum, mean and maximum temperature values are used as input variables.

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