# Glazed Doors

A glazed door is a part of the building envelope or an internal component that is typically considered a type of window, as it allows light to penetrate and can significantly influence both heat loss and heat gain.

### Specify a Glazed Door

Glazed Doors (hinged, bi-fold, sliding, etc.) can be added to any aspect to be considered in energy or daylight modelling. For compliance purposes, a glazed door is deemed as a window. Similar to windows, they can be set for openability for airflow networks. See '[Add Glazing Openability](https://docs.betterbuilding.io/user-guide/2d-building/envelope/windows)' for more information.

Specify Glazed Doors by selecting the aspect and then select ‘Select Glazed Door’ on the Envelope tab. Specify the Glazed Door System U-value, System SHGC and VLT and then hit 'Save and Close'. 

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