Fan hum

[Ak96]

Anyone know how to get rid of the fan hum?
I hear it next door and drives me crazy when trying to sleep - not the actually fan whooshing, just the hum that goes with it.
I have one of the dirt-cheap speed controllers and unsurprisingly, doesn’t do much to help the hum lol.

Would a more expensive speed controller fix this? Or a muffler?

I have insulated ducting would this help? If so where would it go?
This is my airflow set up:
Carbon filter > ducting > exhaust fan > ducting > window

 

[pulpoinspace]

if its on a controller and you can hear it in the next room there is probably something wrong with the fan. has the fan always made the noise? i would maybe investigate coil whine.

 

[IrkinBollikans]

if its on a controller and you can hear it in the next room there is probably something wrong with the fan. has the fan always made the noise?

What you seek is a variac. Ebay $40

 

[Ak96]

if its on a controller and you can hear it in the next room there is probably something wrong with the fan. has the fan always made the noise? i would maybe investigate coil whine.

It’s one of those things I can only hear when I’m next door on the other side of the wall, weird.
The fan controller is shit, ngl lol. I’ve seen a few posts regarding hum that occurs even with the use of a low quality fan

 

[Hobbes]

.

Is the fan hanging so that the vibrations are dampened?

pics?

.

 

[Ak96]

What you seek is a variac. Ebay $40

What is that?

 

[pulpoinspace]

could be as simple as a cheap fan speed controller. this is the one i use. i have two and theyve both been running for years and never caused any probs.

Environment Controllers | Grow Room Climate Controllers

From master controllers that control every aspect of your grow room environment to individual controllers for temperature, humidity, fan speed and more, Hydrobuilder.com is the expert in managing your grow room climate.

hydrobuilder.com

 

[TreeFarmerCharlie]

How is it mounted? Metal to metal is going to resonate so you need something soft between the metal surfaces. Some fans are also just noisy.

 

[IrkinBollikans]

What is that?

It's a variable voltage regulator. It's on ebay. It's called a variac

 

[PadawanWarrior]

Sounds like vibration to me like some have said. Hang it with bungee cords and see what happens.

 

[IrkinBollikans]

Does the hum disappear when fan speed is turned up?

 

[Ak96]

Sounds like vibration to me like some have said. Hang it with bungee cords and see what happens.

Already is dude

 

[Ak96]

It's a variable voltage regulator. It's on ebay. It's called a variac

Would this do? I have a 4” fan.
Is it easy to attach to the fan?

 

[Ak96]

Would this do? I have a 4” fan.
Is it easy to attach to the fan?

Sorry forgot to add the link lol https://www.ebay.co.uk/itm/Variac-Fan-Speed-Controller-Hydroponic-Grow-Rooms-Extractor-Fans-No-Motor-Hum/132193059882?hash=item1ec752042a:m:m_bXxufW9_m05Fe3IaYA_aQ

 

[IrkinBollikans]

Would this do? I have a 4” fan.
Is it easy to attach to the fan?

https://www.ebay.com/itm/254002524124. This is the one I have.

 

[Budzbuddha]

I use a hammer

 

[IrkinBollikans]

A friend of mine just got one of those ac infinity 6" fans with the temp and humidity controller. He thinks it's pretty slick. I have a Can fan. When I tried plugging it into my old ipower controller, it hummed so badly that I thought it was broken. I was hearing my fan being powered on and off rapidly because cheap speed controllers just chop part of the ac wave going into the fan. Variac gives a smooth signal is what I gather

 

[PadawanWarrior]

Already is dude

Good luck man.

 

[Ak96]

https://www.ebay.com/itm/254002524124. This is the one I have.

That’s a great deal! Thanks man

 

[PURPLEB3RRYKUSH]

How is it mounted? Metal to metal is going to resonate so you need something soft between the metal surfaces. Some fans are also just noisy.

Bout to throw my squeeky fan out the window, i spend more on fans then anything else.