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  • This is an option which can be assigned to Windows during Registration or Update.
  • This option is targeted for VSC and ADF calculations.
  • Useful to analyse windows behind transparent balconies and winter garden.
  • The windows in winter garden and transparent balcony can be registered as Secondary Glazing in order to reduce the inside window result by the relevant transparency of the outside window.
  • For VSC and ADF calculations, 
    • If the outside windows are registered as normal windows, they will be treated as fully transparent by the inside window and thus not reducing the result by the relevant transparency.
  • For ADF calculation,
    • They don’t need to be/should not be attached to the Room when running ADF calculation.
    • If they are attached to the room, they will be automatically ignored when calculating the room ADF to avoid overestimating the value.
  • For ROL/DD calculations,
    • The Secondary Glazing windows are ignored as if they are fully transparent.
    • This is to avoid the need for them to be removed from the groups when running ROL/DD calculations.
    • Because registered windows which are not attached to the room being calculated will be treated as opaque surface by ROL/DD calculations.
  • It is also possible to calculate VSC for the Secondary Glazing Windows.
  • The alternative is to assign ThinGlass material to the balcony surfaces using MBS material dialog.
    • Refer to How to assign the Materials for Balconies? topic under Material Settings knowledge page. 
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