Quote:
Originally Posted by gr8fl4porsche
I am thinking that by greatly reducing the fan speed, I can reduce the noise.
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As well as greatly reducing the airflow and therefore effectiveness of the fan. Are you pumping more into the closet than can be exhausted? If you are pumping 30CFM in but only exhausting 10CFM you are creating a high pressure zone that may generate noise on the fan blades. You really want to balance the air in and out.