Our test results show that some fans are better suited for radiators or CPU coolers compared to others. Once again we want to emphasize that we aren't capable of directly measuring the static pressure of these fans, however our test method gives us a good indication. Only 50% of the original airflow was measured after the radiator on the worse 120mm fan, while the best case fans are able to achieve 70%. It's definitely wise to keep this in mind if you're looking for static pressure fans.
If you want to use 120mm fans, two series stand out from the rest of the bunch: the Phanteks PH-F120 and the Noctua NF-F12. The Phanteks is available in two variants: the SP and the MP. The MP has PWM support and can spin a bit faster, which means that its cooling performance and noise levels are higher. They perform about the same, relatively speaking. Phanteks and Noctua therefore receive Excellent Choice Awards in this category. The Arctic F12 Silent is a good choice if you're looking for a more budget-friendly model, however its maximum spin speed is quite low which doesn't make it very suitable for radiators or CPU coolers.
Even though there are less 140/280mm radiators, the larger cooling blocks tend to offer the best performance and they truly offer extra performance compared to air cooling. Good fans are definitely interesting for radiators like this. 140mm fans generally perform surprisingly well in terms of static pressure. The worse fan in this category was still capable of keeping 70% of the original airflow, the best models are able to score higher than 90%. One of the best fans is the NB-eLoop 140mm 1400RPM from Noiseblocker, which also has a PWM version that doesn't perform badly at all - it already received an awrad in our total round-up due to its excellent efficiency, however it also offers excellent static pressure. An affordable option is the Thermalright TY-141: it offers decent static pressure, however it's not quite as efficient as the top dogs in this test. Therefore it receives a Great Value Award.