Research on design fresh air requirement for civil buildings

Compares and analyses the standards of fresh air requirement at home and abroad and their system discrepancy based on design theories of fresh air requirement. The results indicate that some international standards have been developed in consideration of the building material pollution and its intensity, adaptability of occupants, smoking space, subjective satisfaction of occupants and CO₂ index. Considering increasingly obvious pollution issues caused by occupants and building materials, deems it essential to revise the present standards at home from the five aspects of the reflection of the pollutant source characteristics, pertinence of the standards, fresh air requirement of buildings with low and high occupation density and the conditional applicability of the standards for civil buildings. Presents the revisions of minimum fresh air requirement for public buildings, residential buildings with fresh air systems, hospital buildings and high occupation density buildings in the new standard GB 50736—2012 Code for design of heating ventilation and air conditioning of civil buildings.