How to use

🔥 Set fire mode → click a room to add a seat. Right-click a fire to delete it.

🌀 Place fan mode → click open air outside to drop a PPV. Right-click a fan to delete it.

Drag any fan body to reposition. Drag the yellow tip to rotate.

FANS IN button under each fan toggles it on/off.

Click a fire seat to select it — the stage slider then controls THAT seat.

Click any door or window to toggle open/closed.

Mouse wheel to zoom. Shift+drag empty area to pan.

Wind dial → drag the blue needle to set direction. Speed and turbulence below.

TacVent Sim

Top-down smoke simulation for tactical ventilation training. Single-storey UK semi.

Fire seats

0 seats

StageIncipient

NoneIncipientGrowthDevelopedDecay

Click rooms to add fire seats. Stage applies to all seats. Decay is a dying fire — minimal smoke production but still generates heat in the compartment.

PPV Fans

Click a fan to select it. Drag the body to move; drag the dark dot at the arrow tip to rotate. Cone & thrust apply to the selected fan.

Wind

Speed12 light air Directionfrom NW Turbulence30%

Drag the dial needle to set wind direction. PPV cannot fight a strong opposing wind.

Doors & windows

Speed

0.5× 1× 2× 4×

Legend

Wall Open door / window Closed door / window Fire seat PPV fan / airflow cone

Key principles

An inlet, an exhaust, a clear route, and good communication. Open doors/windows on the route only. Close those off-route. Make the exhaust before turning the fan in.