Comparison of indoor concentration of and exposure to PM2.5 between residences with different ventilation modes based on simulation

Atmospheric PM2.5 can penetrate into indoor environment through building envelopes. It can lead to indoor exposure of human beings to PM2.5 combined with indoor PM2.5 sources. Different ventilation modes result in different PM2.5 indoor concentrations and exposure. Simulates and calculates the PM2.5 indoor concentrations and exposure of residences with natural ventilation and mechanical ventilation in transient seasons, summer and winter as well as the corresponding energy consumption. The results show that residence of natural ventilation with an air cleaner and the residence of mechanical ventilation corresponded to relative lower indoor exposure to PM2.5. The energy consumption of natural ventilation is little smaller than that of mechanical ventilation.