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    Using a DIY carbon filter with a 6" duct fan?

    Ok, that's what I thought. What is the most silent/best running can fans out there. I've been reading and seems like Sun Leaves and Vortex are mentioned quite a bit. But with all the others, there is alot of choices out there. Thanks.
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    Using a DIY carbon filter with a 6" duct fan?

    I have a 6" duct fan from Home Depot. I made a DIY carbon filter as shown numerous times on this forum and others. It works great. Of course, the CFM rating is affected, and I noticed that the fan is working harder because of the increased resistance. The fan noise changes. Today, I've...
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