将美国所有地区124所房屋的实测供暖消耗量与可变基准日（VBDD）方法预测的消耗量进行了比较。研究发现，对于平均供暖季节温度至少比平衡温度高10华氏度的房屋组，VBDD方法可以正确预测。计算消耗量与测量消耗量的平均比率为1.13，变异系数为0.38。当平衡温度在平均供暖季节温度的10 F以内时，需要对太阳能和内部增益进行实用性校正。使用VBDD方法并结合利用率校正，计算消耗量与测量消耗量的平均比率为1.06，变异系数为0.42。由于VBDD方法可被视为旧标准学位的替代品- 日法，现在被称为修正度日（MDD）法，还提供了MDD预测与实测热耗的比较。单位:投资:ASHRAE交易，1987年，第93卷，第。田纳西州纳什维尔2号

The measured heating consumption of 124 houses in all regions of the United States is compared with the consumption predicted by the variable-base degree-day (VBDD) method. It is found that the VBDD method correctly predicts for the group of houses where the average heating season temperature is at least 10 F greater than the balance temperature. The average ratio of calculated-to-measured consumption is 1.13 with a coefficient of variation of 0.38. A utilizability correction for solar and internal gains is necessary whenever the balance temperature is within 10 F of the average heating season temperature. Using the VBDD method incorporating the utilizability correction, the average ratio of calculated-to-measured consumption is 1.06 with a coefficient of variation of 0.42. Since the VBDD method may be considered as a substitute for the older standard degree-day method, now known as the modified degree-day (MDD) method, a comparison of the MDD predictions with the measured heating consumption is also provided.Units: I-P