Oh ok! Looking to find a way to exaust my heat from miners. The temps is getting high with the summer coming. My miners are in libingroom so I need a quiet setup if possible. 
Will keep searching
Will keep searching
Sadly I'm doing the same thing. I have learned more about fan's then i care to.
Here should be over 15K CFM when on high together.
Looking twords miners:
I am still looking at better exhaust methods.