This is a very quiet 1U Hi hot air extraction unit, using 3 mini blowers to expel heat from 19” equipment racks. Behind the 1U escutcheon the ergonomic ½U space design, allows the CoolRaC to be placed in between layers of equipment to pull heat directly away from the gear. Enables the fan to activate only when it reaches 40 degrees. This increases the efficiency of the unit and reduces noise to zero when it is not active.