Knowledge Base AutoCAD
Analyzing Buildings
Get information about the requirements analysis of a building. The demand analysis includes the calculation of the heat load, the cooling load and the ventilation concept.
Heat Load
Select a calculation basis for the calculation of the heat load according to the location and requirements of your project.
Heat load Calculation According to ISSO 51 and 53(2018)
Explains the concept of heat load calculation according to the Dutch standards ISSO 51 and ISSO 53 (2018).
About General Heat Load Data
Explains the concept of general heat load data in the context of heat load calculations.
Details on Ventilation -> Infiltration
Information on the Ventilation -> Infiltration section of the general heat load data.

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 LINEAR Solutions-programs in AutoCAD and LINEAR Building.
Preparing Building
Learn how drawings are prepared by architects to create architecture for building analysis.
Analyzing Buildings
Get information about the requirements analysis of a building. The demand analysis includes the calculation of the heat load, the cooling load and the ventilation concept.
- Heat Load
  Select a calculation basis for the calculation of the heat load according to the location and requirements of your project.
  - Heat Load Calculation Based on EN 12831-1 (2017)
    Explains the concept of heat load calculation based on EN 12831-1 (2017).
  - Heat Load Calculation Based on EN 12831 (2003)
    Explains the concept of heat load calculation based on EN 12831 (2003).
  - Heat load Calculation According to ISSO 51 and 53(2018)
    Explains the concept of heat load calculation according to the Dutch standards ISSO 51 and ISSO 53 (2018).
    - About Building Detection
      Explains the building detection concept in relation to the heat load calculation.
    - About General Heat Load Data
      Explains the concept of general heat load data in the context of heat load calculations.
      - Select Calculation Base
        Shows step-by-step how to select a calculation base for your heat load.
      - Details on Climate Data for the Netherlands
        Information on the Climate data for the Netherlands section of the general heat load data.
      - Details on Building Mass
        Information about the Building mass section in the general heat load data.
      - Setting the Thermal Bridge Supplement Globally
        Shows step-by-step how to set a thermal bridge supplement for your entire project.
      - Details on Thermal Bridge Supplement
        Information about the Thermal bridge supplement section in the general heat load data.
      - Setting the Thermal Bridge Supplement Individually
        Shows step-by-step how to set the thermal bridge supplement at the component in the room.
      - Editing the Table for Thermal Bridge Supplements
        Shows step-by-step how to edit the thermal bridge supplements table.
      - Setting Minimum Temperature of the Building
        Shows step-by-step how to set the minimum temperature for the unheated condition in a building unit.
      - Configuring the Heat Transfer System Globally and at Room Level
        Shows step-by-step how to set up a heat transfer system , both project wide and room specific.
      - Details on Heat Generator Installation Type
        Information on the Heat generator installation type section in the general heat load data.
      - Details on Heat Transfer System
        Information on the Heat transfer system section in the general heat load data.
      - Details on Safety Class ISSO 51
        Information about the ISSO 51 section in the general heat load data.
      - Set Ventilation System Globally
        Shows step-by-step how to set up a ventilation system for your entire project.
      - Set Ventilation System in Ventilation Zone
        Shows step-by-step how to define the ventilation system at the ventilation zone level.
      - Details on Ventilation
        Information on the Ventilation section in the general heat load data.
      - Details on Ventilation -> Infiltration
        Information on the Ventilation -> Infiltration section of the general heat load data.
    - About Component Values
      Explains the concept of component values.
    - About the Transmission
      Explains the concept of transmission at room level, in relation to the heat load calculation.
    - About Ventilation Data
      Explains the concept Ventilation data in relation to the heat load calculation.
    - About the Intermittent Heating Operation
      Explains the concept of intermittent heating operation at room level in connection with the heat load calculation.
  - Heat Load Calculation According to SN SIA 384/2 (2020)
    Explains the concept of heat load calculation based on SN SIA 384/2 (2020).
  - Heat Load Calculation acc. To DS 418 (2020)
    Explains the concept of heat load calculation according to the danish standard DS 418.
  - Heat Load Calculation according to SP 60.13330.2016
    Explains the concept of heat load calculation based on SP 60.13330.2016.
  - Approximate Heat Load
    Explains the concept of approximate heat load calculation by means of quick entry.
- Cooling Load Short Procedure
  Learn how to calculate a cooling load for your building based on the short procedure of VDI 2078 (1996), section 6.
- Cooling Load Dynamic
  Select a method for determining the cooling load to suit the location and requirements of your project.
Dimensioning Components
Learn how to dimension radiators, convectors, panel heating and concrete core activation systems on the basis of the requirements analysis in LINEAR Building and manufacturer-specific.
Inserting Components
Learn how to insert components from the LINEAR CAD Browser into the drawing.
Drawing Networks
Learn how to draw pipe and duct networks, generate schematics, and create slots and openings.
Calculating Networks
Learn how to calculate pipe and duct networks.
Dimensioning/Label
Learn how to label section parts and components in your drawing.
Output
Get information about material compilation in LINEAR Building. You will also learn how to print or export calculation results and material lists in your CAD program.

Details on Ventilation -> Infiltration

Information on the Ventilation -> Infiltration section of the general heat load data.

The options in this section influence the infiltration volume flows on which the calculation is based. In addition, the infiltration volume flow is influenced by the number and position of the facades. The standard differentiates between

one external facade,
two external facades that are not opposite to each other,
two facades opposite to each other and
three or more facades.

You are here:

Module overview ➤ Heat load ➤ Project level ➤ General heat load data ➤ Ventilation -> Infiltration

In accordance with building regulations

Activated: The prescribed minimum volume flows are used for calculation. The standard distinguishes between existing and new buildings according to the building regulations.

Deactivated: The building to be calculated has not been built or renovated in accordance with the building regulations. The infiltration volume flows are calculated depending on the year of construction and building type. The checkbox Newly built house is deactivated. The drop-down list for selecting the building type and the text field for entering the year of construction or renovation become active.

Newly built house

This checkbox can only be activated if the in accordance with building regulations checkbox is also activated.

Activated: The minimum volume flows for new buildings according to the building regulations are used. The present building is a newly built house and can also be calculated with higher standard inside temperatures according to ISSO 51.

Deactivated: The building is an existing building according to building regulations. The building can not be calculated with higher standard inside temperatures according to ISSO 51. The year of construction or renovation must be entered in the activated text field.

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Details on Ventilation -> Infiltration

In accordance with building regulations

Newly built house