Indoor Air Quality and Improvement Strategies of Using Mechanical Ventilation in Confined Spaces

The factors of indoor air quality are affected by the density of people, the size and time of opening the door, and the arrangement of the air inlet and outlet of the ventilation equipment. We found that the optimal CO2 of the cross opening was reduced by 109.7 ppm/min through CO2 concentration detection. However, natural ventilation can result in higher indoor temperatures. Therefore, this study increases mechanical ventilation equipment and explores natural and mechanical ventilation to achieve ventilation energy saving.