Airflow connections between spaces can be represented with Flow Paths. In Ventus, they can model wall leakage, doors, shafts, and other openings within a smoke control study. 🔗 thunderheadeng.com/docs/2026… #ventus #airflow #smokecontrol #simulation

Different pedestrian groups can be represented in the same model using assigned Profiles and Behaviors. This helps define occupant characteristics and movement patterns for circulation and event-space studies. #pedestriansimulation #crowdmodeling #simulation

Detector events can be used to trigger changes during an FDS simulation. Activation Controls can activate or deactivate objects, such as starting a ventilation system when a smoke detector is triggered. 🔗 thunderheadeng.com/docs/2026… #fds #firesimulation #smokecontrol

PDF downloads are available again for the PyroSim, Pathfinder, Ventus, and Results user manuals. Open the release page for each product and select Download PDF to access the manual in a single document format. #thunderheadengineering

Connected spaces like atriums may extend across multiple Levels. Ventus uses multilevel Zones and adjusted Zone conditions to support smoke control studies. 🔗 thunderheadeng.com/docs/2026… #ventus #smokecontrol

Pathfinder’s Initial Delay parameter can represent different arrival times by setting how long an occupant waits before a Behavior begins. 🔗 thunderheadeng.com/docs/2026… #pathfinder #pedestriansimulation

Activation Controls in PyroSim are stored separately from individual simulation objects. This allows an existing control to be assigned to one or more objects through the object’s properties, with changes to the control applied to all linked objects. #pyrosim #fds

Opening a stairwell door changes the flow conditions in a pressurization study. Ventus can be used to compare modeled flow conditions before and after the door opens, supporting evaluation of the pressurization system under each door state. #ventus #fireengineering

Fire Prevention Week is a good time to review the different parts of fire safety analysis. PyroSim, Pathfinder, and Ventus support the study of fire and smoke behavior, pedestrian movement, and airflow under different modeled conditions. #firepreventionweek

Thunderhead Engineering is attending the Human Behaviour in Fires Symposium in Helsingborg this week, covering research in human behaviour, evacuation modeling, crowd dynamics, and pedestrian movement. 🔗 humanbehaviourinfires.se/ #pathfinder #humanbehaviour

Pathfinder allows new Behaviors to be created directly from the Navigation View. After creating a new Behavior, users can define its configuration and add the actions needed for movement logic in the model. #pathfinder #pedestriansimulation #simulation #crowdmodeling

Thunderhead Engineering will be at the 2026 SFPE Annual Conference & Expo in Atlanta, connecting with fire protection engineers, researchers, and practitioners across fire safety engineering. 🔗 sfpe.org/annual26/home #sfpe2026 #fireengineering

Working with high-rise models is easier in the current release. Level visibility now shows or hides whole objects for a clearer model view. 🔗 thunderheadeng.com/ventus/cl… #ventus #airflowsimulation

Updated PyroSim documentation includes an example for modeling fire suppression in FDS. Review simulated suppression behavior for HRRPUA-defined fires. 🔗 thunderheadeng.com/docs/2026… #pyrosim #fds

Atria can now be modeled as a single multi-level Zone. Zone height can be set independently of the building floor, making it easier to represent vertical airflow with zero resistance between levels. 🔗 thunderheadeng.com/docs/2026… #ventus #airflowsimulation #engineeringsoftware

FDS surfaces use convective and radiative heat transfer calculations, even when default values are used. This updated PyroSim example provides a simple test case for reviewing how common surface types behave. 🔗 thunderheadeng.com/docs/2026… #pyrosim #fds #heattransfer

Ventus documentation includes a new how-to for modeling smoke control dampers in stairwell pressurization analysis. The guide covers Q vs P and Self-Regulating Vent Flow Elements, including how installation direction affects flow. 🔗 thunderheadeng.com/docs/2026… #ventus

PyroSim documentation includes updated examples for learning how materials, heat transfer, and pyrolysis are represented in FDS simulations. Use them as an introduction or a refresher on the concepts behind the model. 🔗 thunderheadeng.com/docs/2026… #pyrosim #fds #pyrolysis

Working in different unit systems? The new Supported Units documentation explains how unit input works in PyroSim and Ventus and lists the supported units. 🔗 thunderheadeng.com/docs/2026… #pyrosim #ventus

Section Boxes are now available in Pathfinder and Ventus. Already available in PyroSim, Section Boxes let you define a 3D region of interest to isolate spaces, rooms, or circulation paths for easier navigation and review. #pathfinder #ventus #engineeringsoftware #simulation