Natural Ventilation Options

Advanced tab on Model Options dialog.

Model holes (including holes in virtual partitions)

You can optionally switch off all holes in the model including those holes generated by defining partitions as virtual partitions. In this case the building is modelled as if no holes were defined.

Tip: Unchecking this data can be a quick way to model virtual partitions as standard partitions.

Calculated Natural Ventilation

Wind Factor

See Natural ventilation in HVAC model data.

Modulation of Openings

See Natural ventilation in HVAC model data.

Scheduled Natural Ventilation

Airflow through internal openings

When using Scheduled natural ventilation, windows, vents, doors and holes in internal partitions can be modelled by mixing a predefined amount of air from one zone with the adjacent zone by selecting the Airflow through internal openings option and entering the Airflow rate per opening area.

This inter-zone airflow is transferred equally in both directions and is modelled using the EnergyPlus Mixing option.