heating degree days

Synonyms

HDD

Definition

An annual measure of the extent to which daily temperatures suggest that buildings may require some form of space heating, based on the daily temperature being below a certain threshold (15.5ºC). (UKCIP)

An annual measure of the extent to which daily temperatures suggest that buildings may require some form of space heating, based on the daily temperature being below a certain threshold (15.5�C). (UKCIP)