Sound Proofing a Inline

[The_Core]

Thanks for all the replies. I am going to sit down and read them. I ordered a 450 CFM Vortex and they sent me a 435 CFM Valueline. Still a nice inline, but loud. I am going to pull air from inside the grow tent, filter it, straight into the inline, and the inline is going to push it through the air cooled reflector and out of the grow tent. Thats the plan anyway. So your saying I will have to get insulated ducting and a muffler hooked up to reduce noise. I am going to take a look at this.

 

[Jnugg]

Best way to kill all noise:

Insulated and over sized ducting,the insulated ducting reduces the sound of air wooshing around in the ducting,oversized ducting cuts down on the velocity of the air being sucked/pushed from the fan there for cutting down even more duct noise.Use a duct muffler to silence the air coming out of ducting.Build a fan box with real acoustical foam baffling to silence noise of fan.Use speed controler...using all these methods will give your grow the most silence it could have.

 

[Baino]

Best way to kill all noise:

Insulated and over sized ducting,the insulated ducting reduces the sound of air wooshing around in the ducting,oversized ducting cuts down on the velocity of the air being sucked/pushed from the fan there for cutting down even more duct noise.Use a duct muffler to silence the air coming out of ducting.Build a fan box with real acoustical foam baffling to silence noise of fan.Use speed controler...using all these methods will give your grow the most silence it could have.

exactly.

(i use this kind of foam in my studio)
http://www.thomann.de/gb/standard_absorbers.html

 

[Baino]

but cheaper foam and rockwool are still effective.. do a combination and you will get a fine result aswell..

 

[rrog]

If you're building a box around the fan I would be surprised if simple fiberglass wasn't the best choice. Fiberglass is best in walls and ceilings for noise. The denser materials can start to conduct vibration.

Hanging the box from rubber isolation hangers as many have suggested.

The Lutron variable speed fan controllers really eliminate a lot of that motor hum you hear at slower speeds.

Hang a second sheet of drywall or better yet plywood.

 

[Jbonez]

Ive a 10" max fan mounted in the attic with insulated ducting dumping to a return in my living room... You can hear the air coming out, but if the TV is on, you cant hear anything..

The attic is the best place Ive found so far, mounted to a truss in a box with insulation.. Flawless, silent and as it should be, invisible..

 

[noyd666]

might as well join in lol, i used insulated ducting, through into next room and out side, i cut insulation off left overs, and rapped around fan many times , got a job to hear it now, i intend to try 2 silencers out though.

 

[rrog]

The attic is the best place Ive found so far,

This MIGHT happen:
In the winter that warm, humid air will condense when it hits the cold. You'll have a ton of water up there. That's why bath fan exhaust can't be dumped into unheated spaces, either.

Also, insulation is only minimally effective all by itself because it has no real mass. That's why the heavy box works so well

 

[Jbonez]

This MIGHT happen:
In the winter that warm, humid air will condense when it hits the cold. You'll have a ton of water up there. That's why bath fan exhaust can't be dumped into unheated spaces, either.

Also, insulation is only minimally effective all by itself because it has no real mass. That's why the heavy box works so well

Not with insulated ducting, and certainly not here in florida, lol....

 

[rrog]

Florida changes things! Ha. In the colder climates where condensation can happen, the fact that it's insulated is irrelevant. Once the warm humid air hits the cold air, it'll condense immediately

 

[noyd666]

rrog,i think your right with the condenstation, my insulated pipe from tent outlet to outside building, was removed from tent end, pipe lowered to ground ,a lot of water ran out, the amount serprised me.