kw uninterruptible power supply having n 1 redundancy where the ability to add another power module provides n 1 redundancy in one embodiment of the invention input power to the power distribution unit 14 is received through the top of the rack from a voltage feed 58 in one embodiment the voltage feed 58 is a 240 volt feed coupled to the power distribution unit 14 that enters through the roof panel 56 alternatively the input power may be received from underneath the rack as through a raised floor or through the back of the rack the power protection unit 12 provides redundant power protection for centralized information technology equipment as is contained in the equipment racks 18 the power protection unit 12 can have individual power modules and battery modules that can be individually added or removed to accommodate different load requirements the use of multiple power modules and battery modules provides redundancy by allowing continued operation despite the failure of any one power module or battery module for example the power protection unit can include a symmetra px u00ae scalable uninterruptible power supply having a three phase input and a three phase output available from american power conversion corporation of west kingston r i or the power protection unit can include one of the uninterruptible power supplies described in u s pat no 5 982 652 titled u201c method and apparatus for providing uninterruptible power u201d which is incorporated herein by reference the floor mounted cooling unit 16 provides heat removal by use of a chilled water supply which enters the unit through supply line 60 alternatively the cooling units can provide heat removal using dx compressorized cooling via use.