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Micro Muffler **DIY**

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Cozy Amnesia

My new cab will be located a few feet from where I lay my head every night, so I need it to be very quiet. But the fan I'm using is a 197cfm S&P and, although it is relatively silent compared to inline fans, I would like it to be a little quieter still. Most of the noise it makes is from the air rushing around, so a muffler should help a lot. But I also needed it to be micro-sized to fin in my cab, hence the MICRO MUFFLER!

First I built a box the size of a shoe box around the exhaust vent. I used hard-board and aluminum foil tape to construct it.



I lined the inside walls with fiberglass insulation, the type that is designed to be wrapped around water pipes.



I then put the fiberglass around the floor of the muffler and exhaust port. I also put some foam around hole the fan will go into to reduce vibrations.



I turned on the fan and, "WOAH...I DON'T HEAR HARDLY ANYTHING!!" I was really surprised at how much it hushed the fan down and how much air was rushing out of the exhaust port. Its about as loud as a noisy desktop PC and I have no complaints about that :D.

I'm really satisfied with the end result and I hope this tutorial can help others out there achieve the same. If you have any questions, I'm all ears!
 
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Cozy Amnesia

Glad you guys like it!

hayze said:
Looks good. How big is that cab.
Click to expand...

about 3 sqft I think, but only maybe 2 sqft of growing space. I just finished building it today after about 4 days of hard work. :friends:

I'm going to add a carbon scrubber later on. That will slow air flow down a bit, but I can afford it. My fan is gushing out plenty of air on the lower speed setting, and I'm thinking about getting a speed controller to turn it down even more! S&P fans are da shit.
 
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buck912

New member
Very nice. I want to build my own. Thanks for posting.

Do you think there will be any problem with hairs of the fiberglass being blown out into your room?
 
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Dr 4 four

Member
Nice build Cozy. Great to see your new cab. Good idea using hard-board. It will be interesting to see how much quieter it will be once your carbon scrubbers installed.
 
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hayze

New member
If you put the scrubber on the exhaust side it would probably be silent. Like buck said I wonder if loose fiberglass will be an issue.
 
0p0rat0r

0p0rat0r

Member
Cool idea. Nice little cab you got there. Is that for flowering or vegging?

I had a cab running a 105 cfm elicent inline fan that had the air gushing out noise and when I moved the carbon filter so air was being pushed through it rather than pulled through it I found it did indeed act like a muffler.
 
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Cozy Amnesia

No problems so far with fiberglass stands getting blown around. Its pretty well matted, even when I was cutting it up it held together. I didn't even use gloves and my hands where not itchy at all.

oporator, it's for both I guess.
 
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BigBlack81

Member
Cozy, I beg humbly. Please show us a thread with you mounting a scrubber to this exact setup as it's just what I'd like to do in my cab.

Much thanks. Your ideas are really well thought out.
 
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Cozy Amnesia

Thanks BigBlack! I'll make the scrubber when it starts to get stinky.
 
fat-rob

fat-rob

Member
invoking fiberglass into your grow room setup? Wow, Thats a damn smart thing to do. youve given me ideas thats for sure. Cant wait to see ur results man. k+
 
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Cozy Amnesia

fat-rob said:
invoking fiberglass into your grow room setup? Wow, Thats a damn smart thing to do. youve given me ideas thats for sure. Cant wait to see ur results man. k+
Click to expand...

lol, at first I thought you were being sarcastic. the "k+" threw me off. Thanks for the compliments man!
 
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Dr 4 four

Member
If anything, you could take a piece of pantyhose and attach it around the exhaust hole. That would work as a screen to catch possible loose fiberglass strands or pesky gnats that are trying to get out.
 
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Cozy Amnesia

I think its getting louder.....:confused:

It could just be my imagination though.
 
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JustanotherDave

Member
Cozy Amnesia said:
I think its getting louder.....:confused:

It could just be my imagination though.
Click to expand...
Did you say it's as quiet as a PC but in your other thread did you say it's the same as a game running in an XBox 360?
Well...there are different PC cases out there, mine is truly near silent...but a 360 is a 360. I doubt I'd like laying next to a 360 to sleep either. You may well have addressed the air sound...but what about mechanical sound? Most of an XBox360's sound is mechanical btw, so if it sounds the same....
 
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