I'm in the process of upgrading all my fans and filters. H.A.F. turned me on the the Infinity S8 quiet inline fan so I ordered one. Ordered a Phresh 8 x 24 to go with it. If I like the combo I will upgrade all my tents with them. I really need to cool things down and with 750 cfm compared to the 340 cfm that I'm using now will make a big difference.
They say the S8 runs at 39 dBA. That's awfully quiet for 750 cfm. It's like 2 sones. My 340 cfm Whipserquiets run at 1.7 sones and they are very quiet. I will be amazed if it runs at full speed and only produces 39 dBA. Going to cost $2k just to upgrade fans and filters