At China Refrigeration Expo 2021 (CR 2021), a i r handling units (AHUs), fan coil units (FCUs), fans, air ducts, fresh air systems, etc. were exhibited on a considerable scale, focusing on healthy functions in the context of the pandemic. For example, filtration and sterilization functions have been added to conventional technology, and there were greater numbers of fresh air systems exhibited. In this report, automatic controls for buildings are also a key focus.