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Post by kilroyrock on Aug 11, 2016 13:54:49 GMT -6
Anybody try this stuff? I am trying to reduce AC return fan noise, and this stuff just may do the trick. No more expensive than an acoustic panel, or 8 if you make them yourself..
www.soundproofcow.com/product/silent-running-1-gallon/
If I can get my return duct to stop being so darn loud, my whole house would be thankful. |
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Post by winetree on Aug 11, 2016 14:43:43 GMT -6
This coating may stop any ringing of the metal ducts, but it won't stop any sound coming through them.
If noise coming through is the problem, a muffler with deadening material inside will help.
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Post by keymod on Aug 12, 2016 3:02:23 GMT -6
Thanks for posting this. The A/C unit in my house is very loud as the air passes through the ductwork. Ringing is a big problem - one particular zone is acting like a pipe organ. A lot is exposed in the basement and attic and this product is something I am going to try. Thankfully, the HVAC in the studio is very quiet and I have no need for this there.
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Post by M57 on Aug 12, 2016 5:21:01 GMT -6
I've been told that one solution to fan noise is more ductwork. More distance traveled = quieter. If the ductwork is rattling, that sounds like an installation issue. Is the ductwork exposed in the room? If that's the case, the fan may not be your problem, at least not design-wise, and maybe dampening material like that paint is worth a try.
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Post by kilroyrock on Aug 12, 2016 6:30:00 GMT -6
There's another video where they painted the inside of a motor cavity (around the motor) with the stuff, and it drops it 10db. I've got 4 turns going to my return, but it's still killing me. If I can paint this on the inside and deaden it like a panel would, stopping the reflections, I'd say it's doing it's job!
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Post by jazznoise on Aug 14, 2016 17:41:12 GMT -6
I'd put this stuff on the cymbals of must drummers I know!
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Post by jazznoise on Aug 14, 2016 17:41:41 GMT -6
Also 1000+ posts. Up da Ra!
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ericn
Temp
Balance Engineer
Posts: 14,919 
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Post by ericn on Aug 14, 2016 19:49:03 GMT -6
Before putting anything on any ducts check to make sure it will be compliant with all local codes!
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Post by kilroyrock on Aug 15, 2016 11:39:36 GMT -6
Before putting anything on any ducts check to make sure it will be compliant with all local codes! Codes Schmodes! hahahaha <turns around to watch neighbor's deck collapse> |
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Post by keymod on Nov 19, 2016 4:38:36 GMT -6
Mr. Kilroy, did you ever try this stuff? The noise in my house ductwork is so loud I broke down and bought a five gallon pail. Not sure when I'll have time to start applying it, but I will report back my results when I can.
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Post by kilroyrock on Nov 22, 2016 13:28:23 GMT -6
Mr. Kilroy, did you ever try this stuff? The noise in my house ductwork is so loud I broke down and bought a five gallon pail. Not sure when I'll have time to start applying it, but I will report back my results when I can. I haven't, no. I was hoping someone could show me what's up. I am EXTREMELY intrigued. PLEASE post before/after noise if you can. It's gotta help, right? |
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Post by EmRR on Nov 22, 2016 14:57:22 GMT -6
It seems expensive, but I haven't compared against similar substances that would probably do similar things. I'm reminded of people using rope caulk and all other sorts of things to damp resonances in metal speaker horns.
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Post by kilroyrock on Nov 29, 2016 6:14:00 GMT -6
It seems expensive, but I haven't compared against similar substances that would probably do similar things. I'm reminded of people using rope caulk and all other sorts of things to damp resonances in metal speaker horns. What are similar substances? Just rope caulk? That was the whole thing, i couldn't even find anything that would do such things. If this stuff works, i'm painting my entire intake, because my fan echoes through 3 bends and 20 feet. I swear I'm right in front of the sucker. |
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Post by EmRR on Nov 29, 2016 8:08:09 GMT -6
What's a bucket of that stuff you dip tool handles in cost? I dunno. Thick mastics? I dunno. How much Great Stuff would it take to cover it, and what would that cost? Etc. etc.
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Post by svart on Nov 29, 2016 11:43:53 GMT -6
Metal ducts? You can get that stuff that they use in cars, Dynamat, or something like it and cut it into strips and put it on the metal work to help deaden any vibration.
You could also simply use structural adhesive (liquid nails or something) and glue strips of drywall to the outside of the metalwork to add mass and deaden the metalwork vibrations.
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Post by EmRR on Nov 29, 2016 12:49:07 GMT -6
Factor your labor value. The fancy stuff may prove value.
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