Quote:
Originally Posted by Speedslug
Aye and I would add that trying to deaden the sound from the structure with thick foam padding between the fan and the mounting bracket can help as well.
Anything to keep the vibration from getting to walls , roofs or floors will cut back on the noise levels.
I have my fan mounted to my huge hood and the hood is hung on chains with springs to more chains that hang from hooks in the ceiling.
Isolating vibration is the next step after getting quiet fan blades.
You might have to run two vent systems side by side to get both the low noise level and the amount of air movement you want.
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That's basically how mine is set up. I'll try to get some pictures later.
I have the two fans on either side of a T blowing into it. Then up through the T and out the top of the hood and out the window.
I have all of my ductwork hanging with... whatever that stuff is called. It's basically a thin strip of metal about an inch wide with holes in it every half inch or so. I've had it sitting around forever and can't remember what it's actually called. But the whole ventilation system is held up with it, so there are very few solid contact points with the hood. Very little vibration.