Ventilation Solutions for AutoCAD

Design and calculate ventilaton systems in Autodesk AutoCAD


€ 59.00 / month

billed annually

€ 219.00 / month

billed annually

Professional 3D
€ 389.00 / month

billed annually


MEP Model Creation (Ventilation)

For example:

  • Pipe command including system class determination
  • Automatic connection of ducts including necessary transitions (auto-routing)
  • Automatic T-piece connection
  • Configurator for air handling units
  • Offset command to resolve collisions
  • Wide variety of air outlets, protective gratings and components for round, oval and rectangular ducts such as sound absorbers, fire dampers, fans and volume flow rate controllers (generic and manufacturer-specific)
  • Configurator of parallel ducts/pipes for routing multiple ducts and pipes at once
  • Automatic Labeling
Yes Yes Yes

Storey table

For example:

  • Automatic import of storeys from the architectural model
  • Control of the storey in the Construction level / offset (+/-) section
  • Easy Creation of storeys and work levels
Yes Yes Yes

Visibility Control

For example:

  • One click visibility control for building parts
  • One click visibility control for storeys
  • One click visibility control for disciplines
  • One click visibility control for component groups (e.g. systems, insulations, etc.)
Yes Yes Yes

Industry Components via CAD Browser

For example:

  • Extensive CAD libraries with approved components of our wide range of industry partner
  • More than 6 billion possible components and component combinations
  • Direct placement of original manufacturer components into your model
  • Multiple placing modes (place, insert, replace)
  • Configurators for complex component combinations (e.g. cascade systems)
  • Including technical and commercial data (e.g. article numbers and packaging units)
  • Detection and consideration in the network calculations
Yes Yes Yes

Automatic Detection of the Air Duct Network

For example:

  • Detection of drawn ducts and components directly in the model and analysis of the system
  • Detection of all integrated components such as air outlets, fans or volume flow regulators
  • Consideration of technical datas integrated in the model
  • Detection of drawn dimension for the optionally consideration in the network calculation
  • Easy mapping of foreign components for the consideration in the network calculation
No Yes Yes

Air Duct Network Calculation with Redimensioning

For example:

  • Automatic calculation and dimensioning of all components in the ventilation network
  • Dynamically determined zeta values for a detailed calculation of the drag coefficients
  • Detailed setting options, e.g. for dimensioning limits (maximum heights, etc.)
  • Flow mechanical balancing
  • Integrated sound level calculation
  • Determination and variant comparison of duct materials including original manufacturer data sets with reals product properties
  • Calculation directly in the model incl. redimensioning
  • Calculation of multiple systems in one model
  • Selection of suitable (manufacturer) components based on the calculation results
  • Saving of values directly in the model with optional consideration in the IFC export
  • Visualization of results using liNear Data Coloring (dimensions, materials, velocities, unfavorable flow path and many more)
No Yes Yes

Flow mechanical Balancing of complex Systems including Sound Level Calculation

For example:

  • Flow mechanical Balancing with transfer of performance data from real product properties using data sets from leading manufacturers
  • Calculation of multiple systems in one model
  • Determination also of networks with several control levels
  • Consideration not only of the distribution networks, but also the generator part
No Yes Yes

Bill of Quantities including Article Numbers

For example:

  • Clear and comprehensible calculation results as well as complete bill of quantities
  • Detailed parts lists including article numbers and material check
  • Bill of quantities and parts lists in several output formats (Windows printout, Excel, text, UGS, GAEB, ASD)
No Yes Yes

Detailed 3D Design (Ventilation)

For example:

  • Air duct design with routing functions
  • Automatic connection of air ducts including transfer of media, materials, dimensions and pressure levels.
  • Device Configurator for central air handling units
  • Insertion of components into the air duct, including suitable transitions and air duct flange profile
  • Real-time collision check
  • Automatic 3D generation of calculated single-line drawings
  • Connection editor for your own 3D components
  • Dimensioning aids for size detection
  • Construction with reference edges and easy detection of asymmetric transitions
  • Material classes for steel sheet, stainless steel, aluminum, plastics, and brick ducts
  • Predefine insulation materials and show or hide them with transfer to the parts list
  • Consideration of deductions for welding seams, gaskets and insertion and bolting depths
  • Manually or automatically assigned item numbers
  • Wide range of components to choose from, e.g. air grilles, grilles in general, sound absorbers, fire dampers, and many more
  • Material lists, parts lists with item numbers, sawing lists for pipes, item lists
No No Yes

Free Access to Online Tutorials

  • Easy start and education with the liNear tutorials and example projects in the exclusive customer area on our website
Yes Yes Yes



Exemplary Workflow – Ventilation Design with AutoCAD

Step 1: 2D Design and Scheme Design

For ventilation and air conditioning systems in hospitals, administrative buildings or for industrial use: With the liNear toolbars, routing commands, connection functions, automatic legends, slot design assistants and much more, you can draw calculable systems. Make use of fast, clean and perfect documentation with the option of an automatically created 3D model. The supplied manufacturer libraries allow you to design with objects that are actually available. You have the choice between our liNear Configurator or the device configurators of our industry partners in order to create the central air handling units. 

Step 2: Duct Network Calculation

Within the duct network calculation, you not only determine the optimal dimensions of the system with the help of a powerful pressure loss calculation including balancing. In addition, the system is also analyzed in terms of acoustic aspects. All results can also be visually checked with liNear Data Coloring and further optimized. With the calculation you also consider complex systems, for example with several installations in one project. All results are saved directly to the components and exported during transfer. An eKlimax interface enables the production of all ducts and fittings based on your design work. 

Step 3: 3D Design

Air duct systems require space, which is why 3D design is an obvious option, especially for ventilation systems, in the early design stages. With liNear Design 3D Ventilation you may build your three-dimensional and realistic systems in no time. With a depth of detail that can be used for prefabrication. Collision checks are particularly indispensable when alignment with other trades is performed. They are carried out permanently during the design phase. The program analyzes exactly where collisions might occur in the system and marks them in the model. You may derive all views and intersections from one and the same model. With any modi­fication all remains synchronized. This means precision and productivity in one step! 

Step 4: Labeling and Transfer of Results

Write the results of your design work directly into the model. With the automatic labels, you will do this in a quick and easy way. You can define and reuse labels globally, per component group or for individual elements. It is also possible to add your own parameters, which can be included in the labels. All results such as the bill of quantities, the results of the duct network calculation or the sound level calculation are offered in different formats. All information is saved directly in the model. The final MEP model is provided for the BIM process. The IFC format is also available as an option.