Noctua are great fans and I’ve used them in several computer builds but they are renowned for being the best noise/performance ratio not the CFM king. If moving air is a higher priority over noise then there are considerably cheaper 12v options that will move a lot more air.
Also keep in mind the noise levels in fan reviews are relative to an acceptable noise level in a water cooled rig sitting beside you at a desk or HTPC in a living room compared to what we might consider acceptable noise level in self contained grow tent in most likely its own room. In my opinion noise is a non issue for tent use especially the marginal noise levels high performance 12v fans produce.
Long story short you are paying a premium for quiet fans when you buy Noctua and you don’t need to be.
*edit: Noctua’s also have good static pressure but once again non issue unless you are using it to push air through a filter (or radiator like what it was designed for). For air circulation its not really a big deal.
