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.
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...