Defusing The Sound of air flow

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Michael Phelps

Well-Known Member
Im currently running a cab, 3 1/2 feet wide, 6 1/2 feet tall, 2 feet deep.

Im running a 400w mh/hps cooltube depending on vegging or flowering.

Im also running a 435 cfm squirrel cage fan to exhaust the cab through the cooltube.

Ive already sound proofed the fan itself, i built a sound box for it and insulated the inside of the sound box with foam sealant and several old t-shirts and an old blanket, it works great. The only problem im having is fan itself produces so much airflow that my box itself is quiet but the air coming out of the back is def not.

Anyone know a good trick on defusing the sound?

I really need some help with this please
 
renyman

renyman

Active Member
Michael Phelps said:
Im currently running a cab, 3 1/2 feet wide, 6 1/2 feet tall, 2 feet deep.

Im running a 400w mh/hps cooltube depending on vegging or flowering.

Im also running a 435 cfm squirrel cage fan to exhaust the cab through the cooltube.

Ive already sound proofed the fan itself, i built a sound box for it and insulated the inside of the sound box with foam sealant and several old t-shirts and an old blanket, it works great. The only problem im having is fan itself produces so much airflow that my box itself is quiet but the air coming out of the back is def not.

Anyone know a good trick on defusing the sound?

I really need some help with this please
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you can get a muffler which they sell everywhere. you could use insulated ducting or tape on sleeping bags and shit over your current ducting. also consider a fan speed controller if your temps are in check.

straighten your ducting as much as possible too
 
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Bob Smith

Well-Known Member
renyman said:
you can get a muffler which they sell everywhere. you could use insulated ducting or tape on sleeping bags and shit over your current ducting. also consider a fan speed controller if your temps are in check.

straighten your ducting as much as possible too
Click to expand...
Agreed, insulated ducting works great to muffle air flow.

Give the "Shhh, your neighbors can hear you" thread (it's a sticky, I believe) a read - real good info in there.
 
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Michael Phelps

Well-Known Member
Bob Smith said:
Agreed, insulated ducting works great to muffle air flow.

Give the "Shhh, your neighbors can hear you" thread (it's a sticky, I believe) a read - real good info in there.
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Thanks ill def try that, ive actually read that thread quite a few times, thats where i got the info on building a sound box for it. (the sound box works great, the fan used to be so loud you could hear it anywhere in the house, now its so quite you can put your ear up to the wardrobe and you cant hear anything except all the airflow coming out the back)
 
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Michael Phelps

Well-Known Member
renyman said:
you can get a muffler which they sell everywhere. you could use insulated ducting or tape on sleeping bags and shit over your current ducting. also consider a fan speed controller if your temps are in check.

straighten your ducting as much as possible too
Click to expand...
I was thinking about just getting another fan and having the cooltube on its on ventilation and the box on another.

The problem ive noticed is, the 400w seems to heat up my entire room from all he air being exhausted out of there, i live in the denver area so its quite cold outside and if i keep my window open about 6 inches my room still stays a nice warm temp because of the light.

Have you ever experienced this? I mean i knew a 400w would produce more heat, but i def didnt realize it would produce as much as it does.
 
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Bob Smith

Well-Known Member
Michael Phelps said:
I was thinking about just getting another fan and having the cooltube on its on ventilation and the box on another.

The problem ive noticed is, the 400w seems to heat up my entire room from all he air being exhausted out of there, i live in the denver area so its quite cold outside and if i keep my window open about 6 inches my room still stays a nice warm temp because of the light.

Have you ever experienced this? I mean i knew a 400w would produce more heat, but i def didnt realize it would produce as much as it does.
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I have a 6" inline dedicated to cooling my light, and another 6" inline hooked up to my filter for exhaust, and a 4" inline for intake.

Having your light cooled by its own fan is a necessity, if you wanna enrich with CO2.
 
renyman

renyman

Active Member
Michael Phelps said:
I was thinking about just getting another fan and having the cooltube on its on ventilation and the box on another.

The problem ive noticed is, the 400w seems to heat up my entire room from all he air being exhausted out of there, i live in the denver area so its quite cold outside and if i keep my window open about 6 inches my room still stays a nice warm temp because of the light.

Have you ever experienced this? I mean i knew a 400w would produce more heat, but i def didnt realize it would produce as much as it does.
Click to expand...

Some tips on keeping heat down is to pull the air going across the bulb from somewhere else(outside, another room, outside a tent). Also keep a good sized oscillating fan blowing across the bottom of your cooltube. I stack mine on boxes and keep the stream blowing right underneath it. It really helps.
 
tea tree

tea tree

Well-Known Member
the best way to keep it cool is to make sure you are reall exhausting that hot air out of the grow room. I tried all diferent setups and it making sure that the air was pumped out of the room made all the diference. It makes so much a diference that now in winter I can run my 600 bare bulbed with no cool tube and just pull all the tent air and dump it outside. It makes more a diference than you think.
 
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Michael Phelps

Well-Known Member
Alright cool, unfortunately i cant really exhaust the air outside of the room, my window literally 6in away from my neighbors back yard so i cant exhaust it out of that, the only other place i could do it is up into the attic but i dont really wanna fuck with that cause i dont know how long we will be living here.

Renyman i put a fan blowing between the light and the canopy and its helpling alot, also what i started doing is just leaving my bedroom door open and its actually brought the temps down to what they need to be, at this point i just need to solve the air flow problem and i will be set.
 
Punk

Punk

Well-Known Member
Are you having heat problems or noise problems?

If its noise, just hang more ducting out the exit side of your air hole that it's making the noise.
 
renyman

renyman

Active Member
Michael Phelps said:
Its just noise problems now, So your saying make the ducting longer?
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Man, you need to find a way to change the air in that room i believe. From everything ive read this is important to prevent mold and things like that. Could be wrong but thats what they say. If you dont share an attic with anyone else cutting a small hole in the ceiling is no big deal. They have patch kits you can buy for less then $10. But make sure you have a filter.

And once you exhaust that hot air your temps will lower, then you can buy a $17 fan speed controller at dchydro which will lower your fan speed which in turn will take care of your noise issue.
 
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Michael Phelps

Well-Known Member
Okay thanks for the info, Ill try doing that.

Your saying i need to make a carbon filter? or a filter for the air going into the attic?
 
Mcgician

Mcgician

Well-Known Member
DeFUSING the sound of air flow? Damn, I'm pedantic. It's DIFFUSE.

Insulated ducting+ muffler if absolutely necessary. That is all.
 
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