Airflow Simulator

Draw your first room

Choose Room and drag on the grid, or use Add room.

Room pressure Pa gauge

-0.10+0.1

Qualitative airflow relative

lowerhigher

Color, size, and pulse speed increase with calculated flow relative to installed fan capacity. Not point velocity or CFD.

Inspector

Select a room to edit its geometry and inspect calculated results.

Diagnostics

No current warnings or errors.

Rooms

0/100

Draw a room on the plan or use Add room.

Fans

Choose Fan and place one on a valid wall span.

Doors

Choose Door and place one on a highlighted wall span.

Model assumptions

Pressure network, not CFD

Each room is one well-mixed pressure zone. Results do not describe exact velocity, turbulence, jets, recirculation, or comfort at points inside a room.

Plan units: integer mm
Solver units: SI
Outside: 0 Pa gauge

Default envelope and closed-door leakage values are illustrative and uncalibrated. Exhaust replacement air comes only from modeled doors, supply fans, and visible leakage.

Fan face dimensions do not determine airflow. Rated flow is required, output percentage scales that rating, and the ideal fixed-flow model can demand more pressure than a real fan can produce.

Door and fan elevation are saved and validated but do not affect pressure or flow in this isothermal MVP. Results are not engineering, code-compliance, or life-safety certification.

Door arrows show calculated link flow. Animated arrows inside rooms are qualitative direction cues only; they are not local velocity vectors or CFD results.

Floor plan