what to use for sound reduction??

Let us know how it goes. I'm interested. I've had ALOT of success with insulated ducting and Fatmat. But I'm always looking for improvements.
 
I know exactly what sound your talking about with the blowers. It's like a humming sound.
This is what I did.
I took a steel C-Clamp and tightened it onto the motor of blower.
The C-Clamp absorbs the vibration from the blower and humming sound goes away.
 
desertrat said:
hey everyone, have searched the forum and web for sound suppression ideas without success. what do you guys use to reduce the sound from the venting fans. i'm running a 170 cfm and a 440 cfm fan
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Which noise?

The motor or tip speed noise, or air movement. Different advice.
 
got the fan problem solved by using a variable speed controller to dial the things down to the amount of air i need. still have louder than desired air flow but i'm adding a duct muffler and insulated ducting.
 
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