The Load Infiltration dialog allows whole building infiltration data obtained from pressurisation tests also referred to as "blower door" tests to be entered and the appropriate infiltration rate is set in model data based on the infiltration data entry options selected. The whole building infiltration value must be entered in m3/s at 50 Pa pressure difference (even if you have selected IP units). This flow rate is applied over the whole building and depending on whether the option to "Apportion infiltration to zones based on surface area" is selected, the infiltration flow is either simply set at building level (if the option is unchecked) or is applied differently to each zone depending on the amount of external exposed surface area (if it is checked).
The infiltration flow rates are calculated from the entered whole building value using equations described in EN 12831 including consideration of the exposed area of surfaces in each zone, building height, wind exposure index and the infiltration units selected in model options.