A data center power distribution system is disclosed. Utility power normally supports the devices (load) in the data center, but when utility power fails, backup energy from a generator and/or flywheel smooths out the supply. Each utility main/backup combination feeds one or more breakers, and each breaker supplies power to two or more servers, where each server receives redundant power input from to such breaker paths. In some embodiments, synchronization buses are absent between the breaker and the server. Redundant and well valved plumbing leads chilled supply water from chiller plants to air handlers (in some embodiments, through an isolation manifold) and back while enabling isolation of leaks and equipment failures. A special air handler design contains water and efficiently moves cooled air into the operational space of the data center.