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



LINEAR Workflow for ventilation design with Autodesk AutoCAD

Schematic design

Input: Supply requirements for the building

Output: Calculable scheme design

Work steps:

  • Create storey table
  • Manual scheme creation with toolbars and specific editing commands

Architecture as construction basis

Input: Architecture plan

Output: Model for further MEP design including levels and rooms

Work steps:

  • Referencing DWGs, DXFs or PDFs from the architect
  • Create storey table
  • Create and enrich the architectural model for further construction 

Determine volume flows, select outlets and configure the air handling unit

Input: Model for the MEP design including levels and rooms

Output: HVAC model with designed outlets and air handling unit

Work steps:

  • Powerful building analysis as a basis for the cooling load calculation
  • Automatic mapping of the building structure (building parts, storeys and rooms)
  • Identification and collaborative correction of modeling errors in exchange with the architect  
  • U-value calculation and addition of any missing calculation parameters
  • Dynamic cooling load calculation for the project, the storeys as well as all rooms
  • Transfer of all relevant values into the model

Create system in the isometry or floor plan

Input: HVAC model with placed outlets and air handling unit

Output:MEP Model with a calculable network (isometric or floor plan)

Work steps:

  • 2D or isometric duct network design using time-saving construction commands
  • Automatic connection of all outlets
  • Insertion of built-in parts from neutral or manufacturer libraries (e.g., silencers or fire dampers)

Create system in 3D

Input:HVAC model with placed outlets and air handling unit

Output: Detailed 3D model

Work steps:

  • Automatic routing functions with preview of possible alternatives
  • System design neutral or with the help of extensive manufacturer CAD libraries 
  • Subsequent placement of components with matching transitions and flanges
  • Automatic bolting of the entire construction (bolts, nuts, washers) with complete transfer to the parts list
  • Pre-define insulation materials and show/hide them with transfer to the parts list
  • Real-time collision check
  • Manually or automatically assigned item numbers
  • Duct and insulation measurement, compilation of frame connectors with profiles and elbows, parts and position lists including all fittings

Air duct network calculation

Input: Schematic, 2D or 3D model

Output: HVAC model with designed outlets and air handling unitmodel with optimized ventilation system (schematic, 2D or 3D)

Work steps:

  • Air duct network calculation (pressure loss calculation, flow-mechanical balancing, sound calculation).
  • Support of several systems at the same time and many special constructions (e.g. cross-section splitting at grilles, several fans)
  • Calculation of existing networks by fixing single or all dimensions
  • Redimensioning of the air duct network based on the calculation
  • Colored display of all results directly in the model (LINEAR Data Coloring)
  • Transfer via e-klimaX directly to the air duct manufacturer
  • Automatic 3D generation during system creation in 2D (step 4 - variant 1)

Labeling, output of model data and results

Input: Calculated and optimized ventilation network

Output: Final ventilation design including model for transfer to the coordination model and calculation results incl. material lists

Work steps:

  • Saving of all inputs and calculation results in the model
  • Publication of selectable values as component data
  • Automatic labeling of the model
  • Addition of own parameters and meta information
  • Printout of the results in standardized forms 
  • Transfer of results and model in all relevant formats