The 2FN version may not be as aggressive as the 4 Fan or Fully Loaded, but it is still comparable to most other products on the market - the difference is that those products do not offer the extra features of the other versions however. This unit and configuration is still considered very aggressive and versatile for a full sized cooling unit (same width as standard components).It circulates air away from components thus protecting equipment from heat accumulations and failures. This unit also allows for, and provides more advanced and unique features than other products on the market.This is a very aggressive and versatile fullsized (same width as standard components)cooling unit. It circulates air away from components thus protecting equipment from heat accumulations and failures. This unit also allows for, and provides more advanced and unique features. The basic version features two top-quality 92mm Levitation fans that are mounted using special mounting hardware which eliminates noise caused by normal fan vibrations. The unit operates on DC voltage and, by adjusting the voltage, can be run silently or more aggressively depending on the application. This unit is ideal for directly cooling amplifiers and receivers installed in cabinetry or rack systems and can also ventilate entire racks and entertainment centers.