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

FeatureSingle-PhaseThree-Phase
Startup PowerWeakerStronger
EfficiencyLowerHigher
Speed ControlBasic (TRIAC)Advanced (VFD)
Airflow Under LoadDropsConsistent
MaintenanceMore frequentLess 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

SpecSingle-PhaseThree-Phase
Max Airflow~6,850 m³/h~8,700 m³/h
Motor Power~400 W~700 W
Control MethodTRIACVFD
Startup PerformanceWeakStrong

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.