Ordos Zhuanlongwan air shaft heat recovery project is located in Ordos City, Inner Mongolia Autonomous Region. In order to make full use of the waste heat energy of mine exhaust air, comply with the national development trend, and deepen the implementation of environmental protection reform measures, the project uses Kcalin exhaust air heat pump units for clean energy heating, bringing users a comfortable and clean heating experience, and realizing the rational use of energy. The system is equipped with 4 sets of exhaust air heat boxes. The project was completed in December 2017 and officially put into use.