“…In the past, due to the low household income across much of the region, domestic heating facilities are not affordable for many residents. Although not extremely cold, low but supra-zero outdoor temperatures in winter in the absence of district heating lead to extreme indoor thermal climates in this region, significantly lower than observed in other Chinese regions [3,4]. With economic development, the residents of China's HSCW region have lifted their expectations of indoor environment, and as a result, are increasingly utilizing equipment for domestic heating, resulting in a rapid growth of heating energy consumption in this area, growing by an estimated 575 times over the past 15 years [5].…”