Hi all
my 8 in in-line fan is load AF
I see silencers on the market from 69 usd to 125 usd
I see that these can be a dyi project for 1/4 of the price !!
I have a few questions for the community
Do you use them ?
Do they work ?
Is it worth the $$$
Has anyone made they’re own dyi filter ? If so how did it turn out
Here’s a dyi video
I did this.
I bought a few HVAC fittings from the depot (4” to 6” reducer and some chicken wire.)
Then I destroyed a couch and used the foam to wrap around the chicken wire cylinder. Then I wrapped some leather around that for good measure.
Not a miracle cure but it did help.
Thanks for you responding so quickly
Cool Would you say it dropped it down by 25% ?
I don’t know much about the inline silencers, but I had a real noisy fan that I put inside of a tote that I lined with pillows and egg crate foam so I wouldn’t hear the fan anymore. Just had to cut a hole on each side for the ducting to go through
Maybe 25%. Maybe.
I ended up buying a more powerful fan and running it at lower speeds but the silencer was in service for a couple of years and was definitely better than nothing.
My grow cab has a long, foam filled exhaust muffler. It works really well. Reduces the noise by 2/3-3/4 when it is attached. Which is always unless I am cleaning pollen out of it after a seed run.
The actual inline blower fan itself is mounted inside the cab, so the cab itself is working like the tote with pillows described above.
As a sufferer of hearing disorders I’ll let you in on some magic, but not voodoo like @Foreigner 🪆:dash: 
Source, path, receiver
…is the order of priority
Distance, thickness, material
…is the order of efficiency in blocking the path
Memorize it 
Makes sense to me. In my case the source was a fan on minimum, the path was the silencer and the receiver was Mrs Foreigner’s sensitive ear drums.
I have insulted ducting too but never got around to using it. It’s a bit of a bitch to work with.
Is nothing sacred to you?
The insults never end.
I can get behind this idea. I leave my fan at 10-20%, like a gentle but persistent whisper.
Nope. Nothing sacred. I went to midnight mass once and brought lots of whiskey.
In my defense it was such a short run of ducting that I just couldn’t be bothered and didn’t see the benefits in a cost benefit analysis.
I have a bookmark of a good looking project for this if ever needed, I like that this guy’s coming at it from a speaker/audio designer standpoint like building driver enclosures.
Oh I get it now. Fuck you ducting!
I’m a bit slow this morning.
AFAIK the idea is like a sealed subwoofer, you need to have some pressure sealing to keep the noise inside besides dampening material to absorb
Yeah going to try dyi muffler first then build something like the insulated tote idea
When talking to my neighbor we share a wall attached at the garages he only hears it when he’s in the garage
So if I move it off that wall try the silencer first then the box
I agree with distance is a factor that could help also
I’ll also say, @Papalag that if you’re switching fans in the future the AC Infinity Cloudline I got to replace a cheap Vivosun is so damn quiet, though I did size it up and use a larger fan than needed so it runs low. I think they’re probably the most silent option you can get outside maybe commercial grade stuff and even that IDK.
Yeah @Dirt_Wizard went the cheap way
I do own a 6 in ac infinity ,I use as in take and is way quitter then the 8 in vivosun there was a big difference in price
Oh well
I still have to fix it do think I can exchange it with Amazon
Agree my AC Infinity is way quieter than my older fan.
Yes, my 8" AC Infinity fan is quiet. The sound of that much air whooshing, even at 50%, not so much.
I did the DIY silencer on my old 2x3 cab and had decent results. It was large and cumbersome though.