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Appendix
Dialogues and additional information
Drainage areas
The Drainage areas window in the Drainage section is divided into two tabs.
Open spaces
Delete open spaces
Delete removes selected open spaces from the table overview. In addition, the corresponding open space polygons in the floor plan drawing are removed from the drawing.
Delete open spaces in the floor plan
There are two different ways to select and delete open spaces in a floor plan drawing.

Appendix
- Dialogues and additional information
  - Wastewater lifting unit
  - Design options (waste water)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Design options (heating)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Design options (drinking water)
    Drawing-specific settings relating to your calculation are set in the Design options dialogue.
  - Construction stages
    You can divide a drawing into construction stages so that you can later create a material extract according to construction stages.
  - Component properties
    In the Edit and Calculate work perspective, your selection in the drawing is highlighted in colour. Section properties and component properties can be displayed and edited differently from the global project settings.
  - Component filter
    The component filter allows you to quickly filter the selected components in the drawing.
  - Drainage areas
    The Drainage areas window in the Drainage section is divided into two tabs.
    - Roof areas
    - Open spaces
      - Add open areas
        Use Add area to create a new open area in the tabular overview of the Drainage areas window on the Open areas tab.
      - Delete open spaces
        Delete removes selected open spaces from the table overview. In addition, the corresponding open space polygons in the floor plan drawing are removed from the drawing.
        Delete open spaces in the floor plan
        There are two different ways to select and delete open spaces in a floor plan drawing.
        Delete open areas in the diagram
        In a schematic drawing, open areas can be deleted via the table overview in the Drainage areas window on the Open areas tab.
      - Place drains
        The Place drains function provides you with intelligent placement routines for open spaces in floor plan drawings. Customisable default settings including plausibility checks of the value entries are made, taking individual technical specifications into account.
      - Hatching open spaces
        Provide the open spaces in a floor plan drawing with a grey hatching for an overview.
      - Open areas overview
        The tabular overview in the Drainage areas window on the Open areas tab displays information on all open areas created in the drawing.
  - Find function
    CALHYDRA has a parameterised search function that supports you when searching for drawn sections and components in the drawing and when selecting products.
  - Hydraulics report
    With the preview of the calculation output, CALHYDRA supports you in customising the calculation output.
  - Mass extract
    With the preview of the mass statement, CALHYDRA supports you in customising the printout of the masses.
  - Material editor
    With the material editor, CALHYDRA supports you with convenient and fast determination of your dimensions.
  - Diaphragm expansion vessel
  - Options Wizard (waste water)
    The options wizard guides you through the settings for the design.
  - Options assistant (heating)
    The options wizard guides you through the settings for the design.
  - Options Wizard (drinking water)
    The options wizard guides you through the settings for the design.
  - Project data
    The Project data dialogue contains project information for the current project, for example for the project cover sheet or to determine the rainfall donations.
  - Product sequence or product selection
    In the Product sequence or Product selection dialogue, select the product sequence or a product for components.
  - Project data
    The Project data dialogue contains project information for the current project, for example for the project cover sheet or to determine the rainfall donations.
  - Simulation
    The simulation is divided into a circulation simulation for hot and cold water and a simulation of a cold water hygiene system.
  - Section properties
    In the Edit and Calculate work perspective, your selection in the drawing is highlighted in colour. Section properties and component properties can be displayed and edited differently from the global project settings.
  - Insert drawing reference
    The Insert drawing reference function guides you through the settings for inserting a drawing reference.
  - Water softening system

Delete open spaces in the floor plan

There are two different ways to select and delete open spaces in a floor plan drawing.

Select the open space to be deleted from the drawing.
1. Select the open space to be deleted in the drawing.
  
  Note:
  Only a single selection can be made in the table overview.
  
  The free-form areas are also marked in the Free-form areas window.
2. Call up the Delete function.
  The selected open spaces are deleted from the drawing and in the table overview in the Open spaces window.
Select the roof areas to be deleted from the table overview in the Drainage areas window on the Open areas tab.
1. Select the open area to be deleted in the table overview.
  
  Note:
  Only a single selection can be made in the table overview.
  
  The open area polygon is selected in the drawing.
2. Call up the Delete function.
  The selected roof area is deleted from the drawing and from the table overview in the Drainage areas window on the Open areas tab.

Note:

If you have removed open spaces, drains lose their assignment to the deleted open space.