Fan Speed Controller for VMC

The fan speed controller for VMC adjusts the airflow of a ventilation unit by regulating the voltage or by selecting a fixed motor speed. Our range includes voltage controllers and 2 or 3 speed switches, for commercial and multi-occupancy mechanical ventilation installations in offices, shops, residential blocks and plant rooms.

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1.5A speed controller for a mechanical ventilation system motor and exhaust hood

230V Single-Phase Dimmer for Restaurants

1.5A speed controller for the T11 turret or a small motor

Ventilsogood

var1.5A

29.00 Tax excluded

In stock

Electronic variable speed drive Special for small motors / turrets: Easily adjust the suction power on your system! Compact, stylish, and affordable, this speed controller is ideal for precisely controlling your T11 turret or any small motor. It offers smooth and quiet adjustment, perfect for fine-tuning the suction power of your ventilation system....

3A REM1 Professional Range Hood Dimmer with Light Switch

230V Single-Phase Dimmer for Restaurants

3A PREMIUM Dimmer, Special 7/7 7/9 Model

SAFTAIR

Var3Asaf

92.00 Tax excluded

In stock

Electronic variable speed drive PREMIUM 3 amps 220V - Precise speed control, reduces motor wear! Perfect for the 1500, 1700, and 2600 m³/h models (7/7, 19/19, 7/9, 19/25) - Dimensions: L 120 x D 90 (D 100 with buttons) x H 150 (with cable glands)- Power supply: 230V - 3 amps- For 7/7 and 7/9 motors, max 3 amps- With potentiometer- Motor on/off button-...

REM1 5A Professional Range Hood Dimmer with Light Switch

230V Single-Phase Dimmer for Restaurants

5A PREMIUM 230V Dimmer

SAFTAIR

Var5Asaf

112.00 Tax excluded

In stock

Versatile Premium Variable Speed Drive: Precise, energy-efficient, and makes starting the motor easier! - Dimensions: W 120 x D 90 (D 100 with buttons) x H 150 (with cable glands)- Power supply: 230 V - 5 A- For 8/9, 9/9, and 10/10 motors or T32 or T36 turrets- With potentiometer- Motor on/off button- Light on/off button- Option to connect a gas valve...

1.5 A voltage regulator for turrets, small VMC motors, or professional food service systems

Electronic variable speed drive for VMC

VMC Speed Control Potentiometer

Ouestventil

potentiovmc

79.00 Tax excluded

In stock

Speed Potentiometer: Easily adjust the suction power on your CMV system! - Power supply: 12 V - controlled by a DC signal- Dimensions: 80 x 80 x D 60- For self-regulating mechanical ventilation units when you don’t want them to run continuously.- Stops when the speed knob is turned all the way- INCOMPATIBLE with worm gear motors or equivalents.- WARNING:...

Centralized and Commercial Mechanical Ventilation Systems

2-Speed VMC Button

Ventilsogood

comm2V vmc

25.00 Tax excluded

In stock

2-speed switch (low speed, high speed) for mechanical ventilation systems. - IP65 PVC enclosure for surface mounting- IP65 ABS enclosure for surface mounting with cable glands (1-speed starter)- WITHOUT thermal protection against overheating and overcurrent. 1-year warranty if installed by a professional and with compliant thermal protection.

Centralized and Commercial Mechanical Ventilation Systems

3-Speed VMC Button

Ventilsogood

comm3V vmc

27.00 Tax excluded

In stock

3-speed switch (low, medium, high) for a mechanical ventilation system. - IP65 PVC enclosure for surface mounting- IP65 ABS enclosure for surface mounting with cable glands (1-speed starter)- WITHOUT thermal protection against overheating and overcurrent. 1-year warranty if installed by a professional and with compliant thermal protection.

Speed controller or speed switch for VMC?

The choice depends mainly on the motor fitted in your extraction fan box and the type of control required. A voltage controller, such as the 1.5A controller for VMC, T11 roof fan or small motor, varies the speed progressively for fine airflow adjustment. A switch, such as the 2 speed switch or the 3 speed switch for VMC, simply switches between the speed steps provided by the motor. No fine adjustment in this case, but a robust and straightforward solution for daily use.

How to choose the right control for your motor

Before ordering, check three points on the motor rating plate: supply voltage, power and current. The whole range is designed for 230 V single phase, the standard for small and medium commercial VMC units. Also check whether your motor is designed to work with voltage variation or only with fixed speeds. This information is usually given in the motor's instructions.

The VMC speed adjustment potentiometer offers continuous manual adjustment, useful when you want to set the airflow once and for all according to the ductwork configuration. For a 400 V three-phase motor, speed variation is generally achieved with a dedicated variable frequency drive (VFD), which differs from the voltage controllers in this range.

Voltage controllers in the range

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Product	Brand	Current	Manufacturing
1.5A controller for VMC, T11 roof fan or small motor	Ventilsogood	1.5 A	China
3A PREMIUM controller, special 7/7 7/9	SAFTAIR	3 A	France
5A PREMIUM controller 230V	SAFTAIR	5 A	France
VMC speed adjustment potentiometer	Ouestventil	Not specified	Not specified
2 speed switch for VMC	Ventilsogood	Switch (no progressive adjustment)	China
3 speed switch for VMC	Ventilsogood	Switch (no progressive adjustment)	China

Adjusting the airflow of a ventilation installation

Speed variation allows the airflow to be matched to the actual needs of the installation, which are often lower outside peak hours. This brings real acoustic comfort, and a motor that runs less hard when it isn't needed. Take care, however, not to reduce the speed of a motor excessively and permanently if it isn't designed to run at very low speed: the motor's cooling depends on it, and prolonged under speed can trigger its thermal protection.

Points to check before ordering

The voltage, power and current shown on the motor rating plate.
The type of control the motor is designed for: progressive voltage variation or fixed speed steps.
For a voltage controller, a permissible current rating higher than that drawn by the motor.
Compatibility with a three-phase motor, which requires a variable frequency drive rather than a standard voltage controller.
The intended mounting method (surface or flush mounted) and isolating the power supply before any work, to be carried out by a qualified professional.

Need help choosing your speed controller or switch?

Send us a photo of the motor rating plate or let us know its voltage, power and current. We can then point you towards the controller or switch suited to your professional mechanical ventilation system installation.

Frequently asked questions

What is the difference between a speed controller and a speed switch for VMC?

A fan speed controller for VMC progressively varies the voltage sent to the motor, allowing fine control of the airflow. A switch, such as the 2 or 3 speed switch, simply switches between the speed steps the motor is designed for, with no intermediate setting. The choice depends on the type of control your motor accepts.

What current rating of controller should I choose for my motor?

The permissible current rating of the voltage controller must be higher than that drawn by the motor, as shown on its rating plate. The range includes 1.5 A, 3 A and 5 A models in 230 V single phase, covering around 90% of VMC requirements. If in doubt, send us the voltage, power and current of the motor so we can check compatibility.

Will a voltage controller work with a three-phase motor?

No, the voltage controllers in this range are designed for 230 V single phase motors. A 400 V three-phase motor generally requires a dedicated variable frequency drive, which works on a different principle from a standard voltage controller.

Can the speed of a VMC motor be reduced significantly without risk?

Reducing the speed of a motor excessively and permanently, when it isn't designed to run at very low speed, can affect its cooling and trigger its thermal protection. This can also significantly shorten its service life.

Does the power supply need to be isolated before installing a VMC controller or switch?

Yes, a speed controller or switch must be installed with the power supply isolated, by a qualified professional. VentilSoGood supplies the equipment but does not carry out installation: surface or flush mounting is the responsibility of a qualified installer.