Comparative analysis on calculation methods of supply airflow to pressurized stairwells between technical standards of China and the United States

Focusing on design approaches of air supply systems in pressurized exit stairwells, this paper delves into a comparative analysis of design objectives, calculation mode and method employed for determining supply airflow based on criteria such as pressure differentials, airflow velocities, and number of doors designed to open. Comparison is drawn between current correlating technical standards of China and the United States, and reveals that there are aspects in Chinese standards that necessitate revision and enhancement. On the other hand, the design approach advocated by American standard emerges as more scientific and rational, meriting consideration and adoption.