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Posted by Glenn on July 3, 2006, 3:00 pm
Is it new or maybe old and has dirt (gunk) built up on the
squirrel cage fan? Cleaning may help. Any small off balance of
the fan will set up a vibration noise that maybe remounting the
blower on cushions might help. It will resonate through the
cabinat. I have a patio fountain pump that was noisy sitting on
the plastic bottom that I put a piece of sponge under it and it
quieted right down.
If it is wind noise, there is nothing you can do, that I have
found. I have installed a few like that, seems like they were
Thermador brand and they are just wind noisy but efficient and
expensive.
>I have range hood over gas range. There is wall mounted
> exterior blower and 8" diameter flex aluminum duct that
> connects from the blower to the hood. The hood and duct
> are concealed inside custom built wooden cabinet. The
> duct is really short, in fact it is no more then 90
> degrees elbow. The blower is rather powerful and even if
> it operates at lowest speed it still causes quite noise
> in kitchen. I thought about putting some sort of
> inculation into cabinet that conceals the duct with hope
> to reduce noise from the blower. What kind of insulation
> provides maximum sound insulation? Are there any other
> steps that can reasonable be done to reduce blower noise?
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