The NetShelter CX Fan Booster Kit is a user-fitted accessory which will increase the thermal capacity of the NetShelter CX. Allowing for more density of equipment, such as Blade Servers & high-density Switches. This Booster Kit consists of a replacement Power Supply Unit - PSU (24V) and a replacement Fan Tray. One Kit is needed per Fan Unit. Compatible with all generations of NetShelter CX 18U, 24U & 38U - this Kit can be retro-fitted to NetShelter CX already in the field, or to newly purchased NetShelter CX units. New Thermal loadings 18U: 1200 Watts > 2400 Watts, 24U : 2400 Watts > 3500 Watts, 38U : 3600 Watts > 5000 Watts.