Silencing Inline Fan - Tips please

Actuosity

Well-Known Member
Hey folks,

I'm trying to make my 3x3 tent as smell proof as possbile but I also need to work in the same room as the tent.
Is it possible to bring an inline fan down to say 20-25dba while still maintaining 120ish CFM?
 

fragileassassin

Well-Known Member
Insulated ducting off both ends of the fan works wonders on bringing noise down.
A fan that small isnt going to be very loud to start with as long as you get a decent one.
 

Actuosity

Well-Known Member
A fan that small isnt going to be very loud to start with as long as you get a decent one.

Im looking to get either the 4inch or 6inch fusion breath off growlights canada.
they're rated around 56dba maximum.

My big debate is if I get the 6inch, but drop it to say 30% speed (or less depending on plant needs) if it would result in a quieter fan.
Im also thinking about getting a duct silencer.
 

JohnDee

Well-Known Member
Actuosity,
I've used Panasonic whisperline fans for over 10 years. Reliable and quiet. Their 120cfm unit creates 1 sone which I believe is around 40 dcb. They pull air through a scrubber nicely. Never had any issues with them...
JD
 

Actuosity

Well-Known Member
Actuosity,
I've used Panasonic whisperline fans for over 10 years. Reliable and quiet. Their 120cfm unit creates 1 sone which I believe is around 40 dcb. They pull air through a scrubber nicely. Never had any issues with them...
JD
I'll take a look at them, do you find it comfortable to be in the same room as the fan?
 

coreywebster

Well-Known Member
Run a bigger fan with a bigger filter and a variac speed controller.
Box fans are quieter but the drop off with resistance is greater.
You can buy fans that are 23-28db , but most are between 40-50db, even my "silent airforce 2" runs at 48db.

You can box in most fans, using any box and something dense.
Acoustic ducting is worth the money.

If your not sleeping in the same room then you can do plenty to keep noise low.
The noise of air flow is easy to deal with, the noise of fan hum is not.
 

JohnDee

Well-Known Member
I'll take a look at them, do you find it comfortable to be in the same room as the fan?
It's a totally different experience then those jet fans. I've been busy setting up a new room and as I was closing up the room a few nights ago...I had to touch the fan to feel for vibration to determine if it was on. The noise of the air turbulence at the exhaust exit point is noisier then the fan motor itself.
JD

PS My experience has only been with the 240 cfm but I'm sure the 120 cfm is even quieter.
 

CrudeDude

Well-Known Member
Prefilters and ducting work pretty well. I also hang all my fans and filters with bungee chords instead of nylon straps or rope. The bungee absorbs the vibrations better than anything else and helps reduce noise as well. Best of luck.
 
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