. I found a Vortex fan 4" and 6" that say they're 49 dBa's. Now, if you can find how loud that is for you, there's a starting point.
Refrigerator Humming 40 dBa
Normal Conversation 50-60 dBa
Vacuum Cleaner 70 dBa
![]()
Can Fan+ insulated ducting. Problem solved.
they also make what is called a duct muffler my dro store carries them
dude i have the same issue i needed a quiet fan and the best one i found was a can fan max fan 8" is the smallest they come so i picked it up even tho itsd more fan than i need its waaaay morte quiet than any other fan or blower you just need to make sure you get the correct carbon filter that has the dorrect cfm rating for the fan
http://www.gchydro.com/CAN-FAN+Max+Fan.html
4in Can Fan pretty quilter for how powerful they are I have two of them and love them too death.
I think Elicent are the best quitest fan fair amount quiter then the vortex and can fan and seems to pull harder too. I love the 14" fans with sound matt on them and cant even hear them with insulated ducting hooked up.