Variable Speed Controller, Fan Speed Controller, Cordless Vent Blower Speed Adjuster for Inline Duct Exhaust Fan, Exhaust fan Speed Controller, Speed Governor for HVAC Hydroelectric Generator Controls

I got this because it's hard to get a fan that has an 'infinitely' adjustable speed. I wanted to run a fan pretty slow and the low speeds on the fan was too fast. This thing works perfectly and I have the full range of adjustability. I will most likely buy another at some point for some other fans I have.

Used to control a 12 in exhaust fan in my garage. The fan is a through the wall kitchen exhaust fan which ran too fast. Tried three other controllers including a regular three speed - none worked. This one works perfectly. It causes a bit of a fan hum but not an issue for my application. It's a continuously variable controller which is not apparent from the description, but a plus for me.

I ordered this speed controller to replace one that failed after several years of use. It's literally plug-n-play. The unit has a variable controller knob that adjusts the fan speed. The fan being controlled is a large floor fan that has three speeds, fast, faster and wow, that's fast. This controller tamed the beast as soon as it was plugged in. Excellent so far, hope it lasts a long time.

This solution only allows for variable control for a very small percentage of the dial. You have to make micro adjustments or else the connected fan is either fully on or off.

Plug it in turn the fan on high and set the speed where you desire, perfect variable option. I purchased 3 and they work like a champ. More affective than previous units I’ve purchased and cost affective. Dial down that shop fan and place it inside and set it to move air without the roaring sound.

Don’t like how the off is next to the high setting

No issues

This motor control was easy to install and worked as advertised.

Nice smooth control, pretty consistent variable. Using with abox fan. No buzzing or anything else. Works perfect.

This Adjuster brought my 25000 rpm fan down to 20 rpm. The dial is a range dial that can range from anywhere from Zero RPM to Full RPM. Exactly what i needed. Hoping it lasts more than a few months. Seems to be good quality.

Only thing to note is that for a 6" duct fan, the usable scale is about 10% of the full scale. If you turn it too much, it just make the fan motor buzz without turning. Also I did remove cover to see if the electronic board can be adjusted, but no it cannot. Otherwise, work fine and has a nice knob feel!

Did not turn off LED light completelystill on after control turned off.I’d be concerned if I was using this for a fan or thought off meant no power.

Fonctionne très bien bon produit