What is one major factor that affects convection currents during natural ventilation?

Convection currents play a crucial role in natural ventilation by moving warm air upwards and allowing cooler air to replace it. One major factor that influences these currents is the wind speed and direction. When wind flows over and around a building, it can create pressure differences that enhance the upward movement of warm air inside the structure.

Increased wind speed can intensify the movement of air, helping to draw out hot air from the upper levels while pulling in cooler air from outside at lower levels. Additionally, the direction of the wind can determine how effectively air enters and exits the building, impacting the overall effectiveness of natural ventilation.

While factors such as the size of the building, humidity levels, and the floor plan may influence ventilation in various ways, they do not have the same direct and immediate impact on the convection currents generated by the wind as wind speed and direction do.