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Reducing sound made by fans?

FarmerJoe

Member
What are some methods of reducing noise produced by a fan. In a stealth grow for example, its critical to cover up the noise made by the fan, so let me hear what you do, or maybe some ideas you have.
 
Y

yamaha_1fan

what kind of fan?

Mount the fan on rubber padding, hang from bungee cords, insulate ducting are some of the things I have heard.
 

tokinsmokin

Active member
Carbon scrubber helps on the exhaust end at dampening the noise, as well as insulation on the ducting, as well as a solid state speed control. I've heard you can use straight ducting as well, but I've never tried that. I've tried the others though.
 
S

stonedeconomist

buy a radial type fan which has more cfm than you need and use a speed controller to slow the fan down and this will reduce the noise a lot. or you can build yourself a DIY silencer and that will lower your noise output. also you can put your fan in a box filled with noise absorption insulation.

here is a link to a DIY silencer for $30.

http://www.icmag.com/ic/showthread.php?t=65345
 
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G

Guest

With respect, it seems silly to buy an expensive centrifugal type fan(Vortex) type that is inherently noisy and then slow it down with a speed controller that makes the blower(s) "buzz" as most common speed controllers do. Then pack a bunch of insulation around it to try to muffle it.

I use Dayton squirrel cage fans which are a) much cheaper, and b) are much quieter.

I don't have any muffler on my Dayton 465(465 CFM unloaded). I also have neighbors sleeping in the bedroom above my bedroom where my grow is. That blower as well as a smaller 90CFM squirrel cage blower pushing air into my grow. Both run 24/7. Not a peep from neighbors...and they would say something if they could hear it. Dayton blowers are sold all over. Grow places have them but usually they are cheaper at electrical supply places, e.g. WW Graingers. You do need an input adapter for ducting($10-15) and one for the output if you are going to muffle it or connect ducting to the output( I don't need to) I barely can hear my blowers in my other bedroom. I have stood right by the window(closed) that has a common porch walkway and can't hear them.

If you need to muffle the output some, exhaust your blower into a plastic trash can full of insulation. Just make sure you have enough holes (1 inch is good) in it so as to not impede the output of air too much.

MT
 
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G

Guest

Here;s the little one for fresh air in. The 465 sits on a chair just like that chair on the other side of the grow tent. Just blows out into the room.


MT

 

Kizzattack

Member
A friend of mine simply cut a hole in the back of his cabinet, sellotaped cardboard over the hole and made a hole in the cardboard, and attached the fan onto the cardboard instead of the wood at the back.
It's only a Pc fan he's using but it seems to have done the trick.
 

lc00p4

STORM-TROOPA
Veteran
my buddy bought a duct muffler from the local hydroshop for $60. attaches directly to the can-fan and with a speed controller, should be pretty damn quiet. stanley blowers are pretty damn quiet because you don't hear motor noise, only blowing air.
 

NOKUY

Active member
Veteran
the above advice is "sound"

I have a 6" Vortex (449 cfm)

it pulls all the air from my room thru my 600 watt w/ a hydrofarm hood

I use a speed controller

on full-blast the 6" Vortex is LOUD

on half-blast w/ the speed controller it's almost silent...and still plenty to cool the light/room

a carbon scrubber on the END will help too (as mentioned)....(my scrubber in my closet is gonna go in front of the hood and stay in the room tho)...and exhausts into sealed A-frame attic):


my scrubber on my NGB cab is BEHIND the fan and lights (160cfm squirrel cage w/ no speed control) ...the scrubber cuts the noise by half easy...(exhausts into the room):













 
G

Guest

NOKUY : Nice setup there. Very neat and well done it looks to me.

I'm not knocking Vortex blowers. They are excellent blowers and do a good job.

I'm just saying if having a "quieter" system is important to you, there are cheaper, better blowers out there....at least IMO. :)

MT
 

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