what I said was the Noctua NF-14A has a good performance for its RPMs but low overall with a max airflow of +/- 10% 83 CFM with a 1.51mm/H2O these are the official specs from Noctua. When you compare these specs they are only middle ground but the fans are among the most expensive on the market. A 1.51MM/H2O is not particularly great for a radiator and 83 CFM is not overly impressive for air flow. The only thing the NF-14A has going for it is that it's sound profile is favorable.
For 120mm fans a static pressure rating of 1.51mm/H2O is horrible. there are fans that are just as quiet that boast over a 4mm/H2O rating; so yes for radiators I am saying besides Noctua's industrial line all other fans made by Noctua are overpriced crap.
Science includes thermodynamics and aerodynamics for a reason use them!