Exhaust fan speed control options

[PuravidaC]

Okay gang, need some input. Jusy bought an ipower 6" exhaust fan to replace my 4" fan. When I use my Active Air speed controller, there is a very noticeable hum that can be heard in adjacent rooms. And this is after I enclosed the fan and packed with insulation. I have read online that cheap speed controllers can cause fans to have a noticeable hum because they are basically cycling electrical current on and off to adjust speed. The answer appears to be that a variac transformer will eliminate hum and be safer to operate. Before I spend another $50, can anyone varify this is how I need to go to reduce/elimanate fan hum?

[Potted]

How do u have the fan mounted? Y can iceolate some fan noise by hanging it with rubber bungee cords.

[Locrian99]

What potted said I was having terrible noise and vibration went with the bungee and all is good now using the active air controller.

[PuravidaC]

Have fan hung with bungee cords. Hum is diffently coming from motor.

[Locrian99]

After buying the fan and the good speed controller would you be near the cost of one of the higher end fans with the built in speed controller?

[Potted]

I would say price would b about the same,? Live and learn sorry man.

[Locrian99]

Was thinking if it was an amazon purchase maybe he can return.

[D.A.A.S.69]

Morning PuravidaC, it's always some kind of sh-t, to be fukn with growing indoors, you think you got every thing just right, and then something else messes up , don't get me wrong ,it's something to do when it's cold outside,and I like growing indoors a little, but the Sun don't f-ck up, I love growing outdoors, done got a bunch started to, just waiting on Good Friday lol. Hope you get your fan fixed though.
especially if you are growing on the slide, it's illegal where I live .

[PuravidaC]

Yeah DAAS, my expanded grow space is getting frustrating (and expensive)! Once I get it right all I'm gonna do is grow a little weed, no more "improvements"!! I see from your signature that your grow space is very similar to mine, size, light (315) and fan. I had heat issues with 4" fan so hoping 6" fan will correct once I get rid of hum. Wish I could grow outdoors. I have done gorilla grows in the past but finding a safe place that can be easily checked is difficult where I live (and illegal)!! I'm too old to run if site gets busted!!!