# Fan

Config type: `"Fan"`  
Source: `crates/components/src/fan.rs`

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## EN

### Purpose & model

Air-moving machine with **performance curves** (pressure rise / power vs flow and speed). Typestate ports: disconnected → connected.

Affinity laws may scale curves with rotational speed.

### Residuals & `n_equations()`

Curve residuals linking ΔP, ṁ (or volume flow), and speed; energy/power residual when power is modeled. See `n_equations()` in source (typically small fixed count for the fan node).

### Ports

`inlet` / `outlet` on the air branch.

### Calibration

Curve multipliers / Z-style factors when exposed via calib API (default unity).

### JSON (main)

| Key | Meaning | Default |
|-----|---------|---------|
| curve data / preset | performance map | required |
| `speed` / ratio | operating speed | 1.0 full |

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## FR

### But & modèle

**Ventilateur** sur courbes ΔP / débit / vitesse.

### Ports

Entrée / sortie air.

### JSON

Voir EN.