FlowSIM Pro 2026 · Green Building Simulation

Simulate
buildings.

Use FlowSIM Pro to see how your design affects airflow, temperatures and energy demand. Work with your BIM or CAD model and compare design options.

Customer portal

01 The software

About FlowSIM Pro

FlowSIM Pro was developed by engineers for everyday project work. It simplifies the preparation of building simulations with open source tools, using OpenFOAM as its CFD core.

Import your BIM and 3D models and evaluate CFD results directly in FlowSIM Pro. There is no need to open a separate program such as ParaView. The graphics engine is designed for large models and multicore processors.

NVIDIA® RTX and LuxCore let you combine CFD visualisation with architectural rendering. RTX supports ray tracing and AI denoising, while LuxCore provides physically based rendering. OpenXR lets you explore your models in VR.

The built-in AI assistant helps you set up and check simulations and answers questions about using the software.

01Airflow & heatOpenFOAM®

Calculate airflow and assess thermal comfort. View the results in your building model. More about CFD

02Fire & smokeFDS / Smokeview

Investigate how fire and smoke spread through your building.

03Building energyEnergyPlus™

Prepare your building model for energy demand calculations.

04Pedestrian flowJuPedSim

Simulate pedestrian flows in buildings. The extension is available for Windows.

Supported formats

Native Revit
IFC 4x3
gbXML
SketchUp
Rhino
STEP
IGES
DWG
DXF
STL
OBJ
FBX
GLB

What hardware is recommended?

We recommend at least 16 GB of RAM for project preparation. Larger CFD calculations need more memory. For Windows and Linux, we recommend an Intel Core i7 or AMD Ryzen 7 and an NVIDIA RTX 3060 or AMD Radeon RX 6600 or better. RTX features require a compatible NVIDIA graphics card. macOS requires Apple Silicon. We recommend a 4K display for the interface.

How does licensing work?

FlowSIM Pro is licensed per workstation. Each licence is tied to one computer. A new activation key is needed when changing computers or operating systems. Network and floating licences are not currently available. Ask about a licence

02 News & events