04 May
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Single-Phase vs. Three-Phase Motors in Commercial Kitchens
Choosing the right fan motor is crucial in commercial kitchens. Here's why three-phase motors are usually the best choice for busy, ducted extraction systems.
Quick Comparison
| Feature | Single-Phase | Three-Phase |
|---|---|---|
| Startup Power | Weaker | Stronger |
| Efficiency | Lower | Higher |
| Speed Control | Basic (TRIAC) | Advanced (VFD) |
| Airflow Under Load | Drops | Consistent |
| Maintenance | More frequent | Less frequent |
Why Three-Phase is Better
- Delivers more airflow (up to 30% more in some models)
- Works smoothly with VFDs for energy-saving speed control
- More reliable with fewer parts to fail
- Handles duct resistance and grease build-up better
- Lower running costs over time
When to Use Single-Phase
- No access to 3-phase power - can be overcome with single phase to three phase controllers
- Very light-duty kitchens or short usage periods
- Wall-mounted fans with little or no ductwork
Example: 500mm Axial Fan
| Spec | Single-Phase | Three-Phase |
|---|---|---|
| Max Airflow | ~6,850 m³/h | ~8,700 m³/h |
| Motor Power | ~400 W | ~700 W |
| Control Method | TRIAC | VFD |
| Startup Performance | Weak | Strong |
Need Help Choosing?
Not sure which fan suits your commercial kitchen? Contact us today and we’ll help you choose the right motor and controller for your layout and power supply.