Dialogs tab of the Program options dialog
These options control whether a calculation option dialog appears by default before every calculation. Note that a dialog always appears when you press Update.
When you create a new site or building, a dialog box appears by default allowing you to enter basic data on the new object. If you prefer not to see these dialogs and just use default data, uncheck these two check boxes.
There are some options for the calculation of the U-value ISO 6946.
You can choose to fix the mean gas temperature to 10°C which is the requirement for strict adherence to ISO 6946. Unchecking this option allows the gas temperature for each gas layer to be calculated individually for a more accurate estimate of gas conduction (and hence the glazing U-value) to be calculated.
You can define the outside air temperature to be used as boundary conditions in the calculation of glazing U-value. The outside air temperature should be 0°C for strict adherence to ISO 6946 .
You can define the inside air temperature to be used as boundary conditions in the calculation of glazing U-value. The inside temperature should be 20°C for strict adherence to ISO 6946 .
By default in Detailed HVAC when you edit an HVAC zone equipment object, such as an HVAC zone, a FCU a chilled ceiling or a sub-component within zone equipment such as a zone heating coil, any changes made on the dialog apply only to that object, that is only the current HVAC zone equipment is ticked on the Target tab of the dialog. However if you check this program option then the equivalent item for all zones in the current HVAC zone group are ticked by default so any changes made will be saved to the equivalent component in all HVAC zones in the group.
This option is switched off by default.
When an HVAC zone is added to an HVAC zone group, default values are taken from the HVAC zone group. This default HVAC zone group data is normally hidden because it can confuse new users who expect changes made to HVAC zone default settings on the HVAC zone group dialog to be inherited by child HVAC zones.
This option allows more experienced users who understand that the HVAC zone group defaults are only used at the point when the HVAC zone is added to the group to control defaults. It is switched off by default.
Tip: The most important application of HVAC zone group default data is when saving HVAC templates where specific HVAC zone settings are required. Any HVAC zone settings made in the source model are not saved with an HVAC template, but the settings on the HVAC zone group are saved and applied to zones added to the HVAC zone group when the template is subsequently loaded in the destination model.