Review on πΌ Fantech WC 15 Speed Control & On-Off Switch: Effortlessly Adjust Fan Speed in 115V, 5 Amp Setting! by Tim Toscano
Extremely loud electrical noise
This knob increases the noise of my fan significantly; it begins to emit a loud electrical "hum". like the hum of a fluorescent lamp, but deeper. If you want a noiseless reduction in fan speed, you need an AC voltage transformer (variac), which allows you to smoothly control the amplitude of the AC current you receive from the mains. I didn't know until I bought this machine. If you care about fan noise, skip this and just buy a CVT.
- Fantech WC15 variable speed knob with on/off switch
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