Seeking dimmer for 350w Industrial fan

[Ucalagon]

Dear Experts - I have a Clarke's Industrial fan and would like to use it to cool our large conservatory. It's got a 3speed setting but even slowest is moderate Windy Day mode. It's rated 350w. I'm having trouble locating a dimmer that's rated 450w ish. I don't intend to run it for extended periods on Gale Force 8 but would appreciate any help. I see I can get 400w light dimmers. Are they suitable? Temperatures in conservatory often exceed 30 deg C.
All help welcome. DW

 

[Darkwood]

Welcome to the forum .

I will ask admin' to give you a DIY under your name, this allows members to realise you electrical level and tailor their advice accordingly.

 

[Pete999]

What is the voltage of this industrial fan?

 

[Lucien Nunes]

Many lighting dimmers will not function correctly with a heavily inductive motor load, however there are phase-angle power controllers especially designed for fan motors such as
Speed controllers - - Electronic speed controller - EFSC

However not all fan motors are suitable for electronic speed control. It will depend to an extent on the existing internal speed control arrangement and whether a run capacitor is fitted, assuming it is an induction motor.

 

[Marvo]

The problem with using a dimmer instead of a fan speed control is that a dimmer has no minimum setting whereas a fan speed controller won't go below a certain speed to prevent the motor running into a stall condition or running so slow it overheats due to lack of ambient air-over or slow running of the cooling fan on the back of the motor.