Research on Evaluation Index of Indoor PM_2.5 Purification Effect

PM 2.5 has been associated with negative health impacts in studies performed throughout the world. Inevitably, occupants are exposed to that was brought from outdoor environment by ventilation airflow. Natural (NV) is commonly used apartments. However, purification methods and their effects were different for NV The main evaluation indexes indoor mass concentration I/O ratio. But some deficiencies have found practical applications of two indicators. This study analyzed limitations ratio based on field measurement. not suitable large-scale, long-term evaluation. had both short-term process. In short-term, it mainly impact lag effect. long-, due difference influencing factors concentration, leading inaccurate results To this end, established a new effect index--the percentage time up standard (PPTS). index strong operability advantages application.