The text below is an extraction from the Corsair PR text:
3 things you need to know about the Corsair Fan series:
1) Design based on solid scientific research and engineering principles
The research in testing fans, done by the Corsair development team, showed that not many fans met the promised performance specifications. Corsair backs up their fan series, warranting the advertised performance, this based on their own solid research and sound engineering principles.
2) Corsair fans are accurate:
Again, via internal testing Corsair warrants that the specifications advertised, are identical to the performance the end consumer gets. No false claims, nor inaccurate listed specifications.
3) Two different designs: High Airflow & High Static-pressure:
Corsair developed fans specifically for use as case fans and a seperate range designed for best performance as Heat Sink Fans (HSFs) and liquid-coolers radiators.
- SP series: Static Pressure: designed for pushing air through the fins of heatsinks and liquid cooling radiators. Featuring 7 thick blades ready to move that air. Only available in a 120mm model.
- AF series: Air Flow: optimzed for high airflow in less obstructed environments such as case airflow fans. The blade design is finer then the SP series, 9 blades for the 120 models and 11 blades for the 140mm version.
High Air Flow on the left and the Static Pressure model on the right.
But Corsair didn't stop with these two models. For each series they included a high rpm aka High Performance or a slower rpm Quiet Edition model, so that the fan choice can be optimized to suit the end user's needs and ears.
Each fan of the Corsair Air Series has it's own custom designed fan housing, by creating a duct shape housing, the airflow is directed straight onto the target. In the picture below you can spot the user replaceable fan ring. Corsair includes a red, white and blue variant in the box.
The rubber corner inserts are a nice feature to reduce the vibration created by the fan motor thus limiting the noise transfer from the fan onto the enclosure. Securing the fan via screws is however not a problem, as tiny plastic inserts are integrated in the rubber housing. Nice design by the Corsair team!
Corsair tested their blade designs with this Longwin Testbench to assure the labelled performance matches the real life one.
The Air Air Flow series come in a 120 or 140mm version. In a single fan or duo pack outfit ( the latter retail at a slightly cheaper price per fan ) Quiet and Performance models for the 120 mm version, however only a Quiet edition for the 140mm model.
The SP ( Static Pressure ) series are only available in a 120mm model, again in Quiet and Performance configuration.