Introduction on revisions of ANSI/ASHRAE/ASHE standard 170-2021 Ventilation of health care facilities

This paper analyses the main revisions of ANSI/ASHRAE/ASHE standard 170-2021Ventilationofhealthcarefacilities, including revising the name of medical rooms, separating the rooms with higher design requirements from other rooms and proposing detailed indicators, increasing the duty status to provide a method basis for the energy saving operation of medical buildings, and further clarifying the exhaust filtration efficiency of various medical rooms. Moreover, the development trend of ASHRAE 170 is briefly presented, and the future development is prospected, in order to provide references for the development or revision of relevant standards and specifications for medical buildings in China.