How to choose your commercial kitchen hood speed controller

A commercial kitchen hood speed controller, also known as a fan speed controller, adjusts the power of the extraction motor instead of running it flat out at all times. The result: a quieter kitchen during slow service periods, and a motor that runs according to actual need. The right choice mainly depends on two criteria: the type of power supply to your motor and the type of control you are looking for.

Voltage controller or frequency inverter

The voltage speed controller varies the voltage applied to the motor to reduce its speed. This is the most common solution for single-phase 230V motors integrated into a hood, from entry level models such as the 1.5A Speed Controller up to the 8A 230V Voltage Controller for commercial hood motor 9/9 10/10. The frequency inverter, on the other hand, controls a three-phase 380V motor by modulating the current frequency: it is found on remote motors in extraction fan boxes or roof extract fans, with power ratings ranging from 0.75 kW (0.75 kW Three-Phase Frequency Inverter IP55) to 4 kW (4kW Three-Phase Controller IP55) in our range.

Which controller for which centrifugal fan motor

For a double-inlet centrifugal fan motor in 7/7, 7/9 or 8/9 size, models such as the Base 4.5A Voltage Controller or the Digital Premium 4.5A Controller (Fasar) cover everyday single-phase use. For a larger motor in 9/9 or 10/10 size, the 8A 230V Voltage Controller takes over, and for a 12/12 or TH3640, the 7A PREMIUM Controller 12/12 - T36/40 (SAFTAIR) or the Controller for 12/12 or TH3640 220V motor (Fasar) are sized accordingly. In three-phase, the frequency inverter remains the reference solution whatever the motor size, as it provides even more precise control.

Smoke extraction and relay control panels

Several products in the range carry the F400/120 smoke extraction rating: 1 or 2 speed relay control panels, smoke extraction buttons, fire service override units or reset units, controllers with a forced run function. A relay control panel controls the interlocking of the fan in the event of a fire alarm, in 1 speed (Base Relay Control Panel Smoke Extraction 1 speed 12A) or 2 speeds, Dahlander or dual winding depending on motor type. A frequency inverter with a smoke extraction function (such as the 1.5kW Three-Phase Controller IP55 + Smoke Extraction) combines day to day control with fire safety operation. Please note: the C4 rating (400°C/30 min) must never be confused with an F400/120 rating (400°C/120 min), as the two designate different fire resistance durations. Always check the exact regulatory requirement for your premises before ordering.

Converting single-phase to three-phase

Do you have a single-phase power supply but your motor is three-phase? The MONO to TRI 1.5kW Converter IP65 400° converts single-phase 230V current into three-phase, with IP65 rating for enhanced heat resistance. A practical solution for replacing a three-phase motor without rewiring the premises' electrical supply.

Points to check before ordering

• Check the power supply of your motor (230V single-phase or 380V three-phase) before choosing between a voltage controller and a frequency inverter.
• Identify the size of your centrifugal fan motor (7/7, 7/9, 8/9, 9/9, 10/10, 12/12...) to choose a controller sized accordingly.
• For an installation subject to smoke extraction requirements, check precisely the rating required for your premises (C4 and F400/120 are not equivalent) before choosing a relay control panel or a controller with a forced run function.
• A relay control panel is also chosen according to the number of speeds of the motor to be controlled (1 speed or 2 speeds, Dahlander or dual winding).
• The electrical connection of the controller must be carried out by a qualified professional, a condition required for the warranty.

Complete your installation with

Find our full range in the sub-categories single-phase 230V speed controllers for restaurants, three-phase 380V speed controllers for restaurants and smoke extraction relay control panels. To complete your installation, also consider lockable isolator switches and emergency stop buttons.