Need a QUIET exhaust fan

Anybody know where to get a really QUIET exhaust fan?

My wife can't sleep with the sound of a fan running, so low noise is my main priority.

Here's the quietest one that I could find so far:

here

My grow room will only be 2' x 3' x 6' = 36 cu feet, so I *THINK* I only need a 110 CFM fan. But I need to add a carbon filter, so not sure if that will require more CFM's.

Most likely it's not the fan noise but the of air moving, so CFM's, I would not go as low as 110 CFm, but if you have to it will work, How about a muffler for your ducting, they are pretty easy to make.......JR

sun leaves wind tunnels are said to be the best for inline fans in the noise department. do a google search for em

jrinlv said:

Most likely it's not the fan noise but the of air moving, so CFM's, I would not go as low as 110 CFm, but if you have to it will work, How about a muffler for your ducting, they are pretty easy to make.......JR

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I've seen a muffler for sale, but not cheap at all. Can you tell me how I can make my own?

Hey dave- I use a panasonic whisperline fan. Instead of having small blades going at a high rpm, it uses larger blades at a lower rpm so you can still get rather high cfms but without the noise. The only thing you can hear is the movement of the air.

wrap a sleeping bag around your fan thats what i seen reduce noise

Is a muffler just a small section of oversized pipe? I could use one for sure. Sitting on the deck my wife's friend says "what's that fan noise?". Ummmm that a dehumidifier. "huh, it exausts to the outside?". Umm yeah, it's a while house unit.

HomeGrown&Smoked said:

Hey dave- I use a panasonic whisperline fan. Instead of having small blades going at a high rpm, it uses larger blades at a lower rpm so you can still get rather high cfms but without the noise. The only thing you can hear is the movement of the air.

Click to expand...

I looked at Panasonics and found this one that's really quiet:
Panasonic WhisperCeiling FV-15VQ5
It's rated at < .3 sones.

In practice it's working great! Very quiet, but puts out a lot of air volume, more than I need for my little cabinet grow room. I'm going to use it to blow warm exhaust air up into my attic.

Used insulated ducting and bolted the fan to the cabinet's upper shelf with foam rubber in between, in order to reduce vibration. Also attached a fan speed control. When it's on low, it sounds like it's not turned on at all, even with the cabinet wide open.

Use an bigger fan than you need, and use a speed control to throttle it down. Most fans run near silent at 50% power. Centrifugal blowers are usually even better.