Three Berries
Well-Known Member
6" fan in 3x3 tent? Way overkill unless you have high ambient temps.
quiter inline fan option
- Thread starter oreo47
- Start date
But the lower you run your fan the quiter it is
Three Berries
Well-Known Member
Get some steam pipe insulation and use as a muffler.
for the ducting?Get some steam pipe insulation and use as a muffler.
was the isomax quiter than the S&P silent?
When you slow down the fan with the speed controller does it make a rattle on fans?
Star Dog
Well-Known Member
No they don't rattle as such, but with a dimmer type controller the coils buzz/vibrate at lower speeds and bigger fans are worse due to the coils sizes. A variac type speed controller is silent operating at any speed.
Psyphish
Well-Known Member
If my memory serves me right, yes it was quieter. But I did have more ducting in that setup, so it might have altered the sound.
MedicinalMyA$$
Well-Known Member
Yes. Multiple silencers work better, and I went so far as to run double acoustic ducting one inside the other (6" inside 8"). Didn't make much of a difference, a bit of overkill really. Where you put the silencer/s in the chain depends on your setup, sometimes the noise seems to just get redirected along and out the ducting and out the filter. Sometimes I found bends in the ducting helped with noise, but also decreased airflow.
FME you may not need to go up to level 5 when using a 6" AC Infinity in a 3x3, your temperatures should decide that for you though. I had that same setup (3x3, 6" fan) and it mostly stayed on 2 or 3. I used two 6" ducted air inlets when I ran HPS with a hood, and dropped to one inlet when I switched to vertical, and stayed with one when I went to DIY LED.
Overall if noise is an issue, just go bigger with your fan and filter (and ducting) and run it slow. The bigger size will still have the pressure of a smaller fan run harder, but will be way quieter. Less whoosh and rumble, same airflow. Plus if you go to a bigger tent one day (and noise is not so much of an issue) you will already have a capable fan.
The quieter you want it the bigger the fan you use. I used a 10" fan in a 10ft square area stealth wardrobe grow once, another person in the room next door who sleeps with their headboard against the wall adjoining my wardrobe could not hear a thing, even on a cold midnight.
I'd love to go for the 8" AC infinity and use it at speed 1 and 2 but its incredible expensive. Which is a better investment, a silencer or a bigger fan.
Like which would be a better option 8 inch fan with no silencer or a 6 inch fan with a silencer ?
I just get a load of sticky sound deadening insulation and cover the fan... also use insulated ducting which helps massively. I also hang the fan with a bungee to avoid conducted resonance
MedicinalMyA$$
Well-Known Member
It would depend on where the most noise was coming from, whether it was fan whine/rumble or air whooshing through the ducting, and what kind of temperatures you are expecting in your setup.
Personally I would go for a larger fan because it definitely mitigates any issues with fan hum/rumble/whine. And larger ducting associated with the larger fan lessens the rushing noise through the ducting. 8" ducting has about 1.8 X the air-flow capability of 6" ducting which means for the same volume of air extraction the air moves slower, thus less noise. And the fan itself is quieter too. Silencing a smaller fan is starting with a potential problem and then fixing it. A bigger fan will mean starting with less potential problems.
If you buy the bigger fan and end up needing a silencer anyway, then buying a smaller fan with a silencer in the first place will be pointless. If you buy the bigger fan and don't need a silencer then that's a win.
The single biggest improvement I ever made to noise issues was to oversize the fan.
i see.