The CoolRac uses 3 low noise mini blowers that extracts hot air from the rack and expels it out of the front vents. The CoolRac also has the option for a thermostat to be connected, enabling the fan to activate only when it reaches 40 degrees C. This increases the efficiency of the unit and reduces noise to zero when it is not active.
The front panel is 1U high and the rear of the unit has been made 1/2U in height so when placed in between equipment it has the space needed to efficiently extract the hot air.