ISO 15927-6:2007规定了累积温差数据的定义、计算方法和表示方法，用于评估建筑物中用于空间供暖的能量。这些数据通常以度-小时或度-天表示，此类数据通常简称为“加热度-小时”或“加热度-天”。 ISO 15927-6:2007包括基于小时或日平均温度计算累积温差的近似方法，以及用于估算任何基准温度的月值的近似方法，当无法直接从气象气温记录计算数据时使用。 在一些国家，使用不同于基准温度的阈值温度。ISO 15927-6:2007不包括这一点。

ISO 15927-6:2007 specifies the definition, method of computation and method of presentation of data on accumulated temperature differences, used for assessing the energy used for space heating in buildings. These are normally expressed in degree？hours or degree-days, and such data are often referred to simply as "heating degree-hours" or "heating degree-days". ISO 15927-6:2007 includes approximate methods for calculating accumulated temperature differences based on hourly or daily mean temperatures and for estimating monthly values to any base temperature, for use when data computed directly from meteorological air temperature records are not available. In some countries, a threshold temperature different from the base temperature is used. ISO 15927-6:2007 does not cover this.