Knowledge Base AutoCAD
Calculating Networks
Learn how to calculate pipe and duct networks.
About the Air Duct Network Calculation
Explains the concept of the Duct Network Calculation.
Settings
Explains the concept of the Settings in the Pipe and Duct Network Calculations.
General Settings
Explains the concept for general settings in the Pipe and Duct Network Calculation Ventilation.
Setting Limit Values for Switching Between Round and Rectangular Ducts
Shows step-by-step how to set limit values for switching between round and rectangular ducts during dimensioning.

New Features
Learn about new features in LINEAR software.
System Requirements
Learn more about the system requirements for using the LINEAR solutions.
Supported Norms and Standards
Learn which norms and standards support the LINEAR Solutions modules.
LINEAR Installation and Administration
Learn how to install, your LINEAR software, license and keep it up to date.
Getting Started
Get basic information about the structure, function and interaction of the LINEAR Solutions programs in AutoCAD and LINEAR Building.
Preparing and Editing Buildings and Architecture
Learn how to prepare drawings provided by an architect to create an architecture for building analysis.
Analyzing Buildings
Get information about the demands analysis of a building with LINEAR Building. The demands analysis includes the calculation of the heat load, the cooling load and the determination of the required air volumes.
Dimensioning Components
Learn how radiators, convectors, panel heating/cooling systems and concrete core activation systems and components of ventilation systems are designed based on the requirement analysis in LINEAR Building.
Create Pipe Run Scheme
Learn how to create pipe run schemes for pipe networks in LINEAR Building.
Calculate Pipe Run Schemes
Learn how to calculate pipe run schemes in LINEAR Building.
Inserting Components
Learn how to transfer radiators or chilled beams to a LINEAR Building connected CAD platform and insert symbols and components from the libraries into CAD.
Drawing Networks
Learn how to draw pipe and duct networks, connect components, generate schemes, and create slots and openings.
Calculating Networks
Learn how to calculate pipe and duct networks.
- Requirements for a Calculable Pipe and Duct Network
  Explains the requirements for a calculable pipe and duct network.
- About Classification
  Explains the concept of classifying components for the Pipe and Duct Network Calculation.
- About Virtual Components
  Explains the concept of virtual components in pipe and duct network calculations.
- About Pipe Network Calculation Heating and Cooling
  Explains the concept of the pipe network calculation for heating and cooling.
- About Pipe Network Calculation Potable Water
  Explains the concept of the Pipe Network Calculation Potable Water.
- About the Pipe Network Calculation for Wastewater and Roof Drainage
  Explains the concept of the Pipe Network Calculation Waste Water.
- About Pipe Network Calculation for Gas
  Explains the concept of the Pipe Network Calculation Gas.
- About the Air Duct Network Calculation
  Explains the concept of the Duct Network Calculation.
  - Settings
    Explains the concept of the Settings in the Pipe and Duct Network Calculations.
    - General Settings
      Explains the concept for general settings in the Pipe and Duct Network Calculation Ventilation.
      - Making General Settings
        Shows step-by-step how to set general settings for the Pipe and Duct Network Calculation Ventilation.
      - Setting Layers for Network Detection
        Shows step-by-step how to select layers that should be considered in the detection.
      - Detecting a Partial Pipe Network
        Shows step-by-step how to limit the detection of components and pipes or ducts for calculation to partial networks.
      - Setting Limit Values for Switching Between Round and Rectangular Ducts
        Shows step-by-step how to set limit values for switching between round and rectangular ducts during dimensioning.
      - Details on "Settings” (Ventilation)
        Information about the Settings dialog in the Pipe and Duct Network Calculation Ventilation.
    - Material Data
      Explains the concept of the material data in the duct network calculation (ventilation).
    - About Rooms
      Explains the concept of Rooms in the Duct Network Calculation.
    - Components
      Explains the concept of the Components section in Pipe and Duct Network Calculations.
  - Calculation
    Explains the concept of the calculation dialog in Pipe and Duct Network Calculations.
- About Reports (Command Group)
  Explains the concept of the Reports command group on the Analyse tab of the Control Board.
Labeling and Dimensiong
Learn how to label components and sections in your drawing and how to dimension your drawing.
Output
Get basic information on creating output with AutoCAD, output in LINEAR Building and on the print mask editor.

Setting Limit Values for Switching Between Round and Rectangular Ducts

Shows step-by-step how to set limit values for switching between round and rectangular ducts during dimensioning.

Before you begin

You want to change the duct geometry automatically in the dimensioning from certain limit values.

Navigate to

Project tab ➤ Discipline: Ventilation ➤ Analyse tab ➤ Settings …

Applies to: Ventilation.

Dialog Settings in Discipline Ventilation of the LINEAR Solutions for Autodesk AutoCAD

Procedure

Open the Duct Dimensions section.
Activate the Use oval duct option if oval ducts are also to be used in the dimensioning.
Use the drop-down lists to set the corresponding threshold values at which the dimensioning should switch to oval or rectangular ducts.

Results

The threshold values are set and are taken into account in the calculation. If the function Generate 3D Pipes or Adjust Nominal Diameters for existing 3D pipes is used in the calculation dialog, the pipes are generated in the drawing taking into account the settings.

Pipes generated in the drawing according to your specifications

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Setting Limit Values for Switching Between Round and Rectangular Ducts

Before you begin

Navigate to

Procedure

Results