Overview
An EC exhaust fan takes AC mains, converts it internally and commutates the motor electronically. Speed follows a control signal instead of a dimmer, and efficiency at reduced speed is better than an AC fan throttled by voltage.
That combination suits continuous exhaust: car parks, plant rooms, kitchens and equipment rooms where the fan runs for long hours and the airflow can follow demand. The premium over AC is real, so the duty hours decide whether it pays back.
Where it fits
- Continuous exhaust from plant and service rooms
- Car parks and basement ventilation
- Kitchen and grease exhaust with variable demand
- Systems controlled by a sensor or BMS
Specifications
| Model | Voltage (V) | Frequency (Hz) | Power (W) | Air flow (m3/h) | Current (A) | Rotating speed (r/min) | Noise dB(A) |
|---|---|---|---|---|---|---|---|
| PMDWF74L25P8-360P-300 | 1~230 | 50/60 | 141 | 2460 | 0.96 | 2100 | 65 |
Selection and installation notes
Confirm the control signal the site provides — 0–10 V, PWM or a bus module. An EC fan will not respond to a voltage controller designed for AC motors.
Keep the electronics out of hot air. The controller sits in or near the motor and is the part most sensitive to ambient temperature.
FAQ
How is the fan controlled?
By a 0–10 V or PWM signal, depending on the model. Confirm the available signal before ordering.
Is EC worth it for exhaust?
Where the fan runs long hours at reduced speed. For short on/off duty the AC version is usually the better value.
Can it replace an AC exhaust fan?
Often, if the opening and duct match. The wiring changes: the EC unit needs a permanent supply plus a control signal.
What happens if the electronics fail?
The fan stops and is replaced as a unit. Keep the model and control configuration on file for spares.
Request Quote
Interested in this product? Share your requirements or questions using the form.
-
Your requirements
Include the specifications, options, or quantity you need, if known.
-
Your questions
Ask about product details, availability, or order information.
-
Your contact details
Leave an email address where you can receive a reply.
