Abstract:In recent years, China's urbanization construction process has been accelerating, and the number of residential supporting commercial complex projects that integrate commercial and residential functions has continued to grow. This type of building has complex functional zoning, with significant differences in usage time and thermal and humidity environment requirements in different areas, which puts higher demands on the design of HVAC systems. The article combines the architectural characteristics of residential supporting commercial complexes, sorts out the design principles of HVAC systems, analyzes the determination ideas of design schemes based on specific project cases, and summarizes the design points from a multi module perspective, providing reference for HVAC design of similar projects.