@V256.420
I have been testing a lot of fans and like the look/specs of the Panasonic Whisperline fans. I presume you run them on full with no speed control?
I need to keep noise level LOW; so far I've bought AC ~, S&P TD-Silent, Active Air, others, and I am not happy yet. The AC~ is ok but you have to use speed 3 or under, else the S&P is quieter, but it has no speed control - not a show-stopper issue as I'm ee familiar with controls. I'm ordering the 6" 340 cfm Panasonic to try one.
PS: This is exhaust app of a 200 cf closet where I need neg pressure to prevent smell in the house, and vent directly thru wall outside thru a 4" dryer vent, so I must use carbon filter (in suck-mode, lol)to prevent odor outside. The first run went great, but the can-lite 6" x 24" was not masking smell near end of flower - I had high humidity and I think that killed it fast.