对美国不同地区52栋住宅楼的实测制冷能耗与可变基准日（VBDD）法预测的能耗进行了比较。研究发现，如果假设所有占用房屋的通风率均为5 ach，则VBDD方法可以正确预测36栋建筑的制冷需求量大于200万Btu/季。每家每户的差异很大，变异系数为0.5。研究发现，该方法始终高估了建筑的制冷消耗量，其测量消耗量低于每季度200万Btu。单位:I-PCitation:ASHRAE交易，1987年，第卷。 93磅。田纳西州纳什维尔2号

The measured cooling energy consumption of 52 residential buildings in different parts of the U.S. 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 36 buildings with cooling requirements greater than 2 million Btu per season if a ventilation rate of 5 ach is assumed for all occupied houses. There is considerable variation on a house-by-house basis with a coefficient of variation of 0.5. The method is found to consistently overpredict the cooling consumption of buildings with measured consumption below 2 million Btu per season.Units: I-P