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AHU  The Air Handling Unit Company

What is EC technology.

EC fans consume, on average, about 30% less electricity than conventional AC fans but what is an EC fan and what makes it more efficient?

EC stands for Electronically Commutated which means it’s a fan with a permanent magnet motor (PMM).  EC motors have been around for many years and are more efficient than AC motors because they use permanent magnets rather than induce a secondary magnetic field in the rotor.

Advantages of EC technology.

Very high degree of efficiency.

Integrated controller (continuous control).

Very simple connection.

Additional functions (pressure control, etc.).

Smaller-sized motor for the same level of performance.

Less power consumption.

EC motor principle.

Permanent-magnet brushless DC motor within the rotor

The stator is driven by electronic switches (which replace the Carbon brushes), controlled by a                      microcontroller.

Electronic system (hall effect sensor or software is used to recognize the rotor position)

AC operated (230Volts Single phase or 380/480Volts 3phase, 50/60Hz)


Energy savings : Minimum power consumption & better efficiency than AC equivalent.

Control : 100% speed controllable, not frequency dependant. Can be set-up for constant airflow or constant pressure applications, 0-10VDC or PWM control signal.

Low motor temperature : for longer lifetime than AC equivalent

Simplicity : Electronic & power transformation are completely integrated within the motor.

High performance : Speed can be driven up to 3600rpm, one EC fan replace multiple type of motors (2, 4 and 6 pole)

Easy connection : No complicated wiring and set-up with a frequency controller EC fans have very little configuration.

Significant noise reduction.

Remote monitoring via. BMS


Typical AC motors have losses in terms of power consumption (copper + iron losses), slippage and frictional losses (mechanical power). EC motor has no slippage losses, reducing losses and increasing efficiency.