Data centers are classified in tiers, with Tier 4 being the best. Our primary vaults are housed in a windowless Tier 4 data center on an upper floor of a building with foot-thick steel-reinforced cement walls. Power is routed through redundant transformers into a conditioned massive battery array to ensure a seamless switch from primary to auxiliary power in the event of an interruption. Auxiliary power is supplied by redundant diesel generators with dual fuel supplies, ensuring uninterrupted power. Our secondary data centers, with similar specifications, are also classified as Tier 4 data centers. The data centers are designed and constructed to withstand all weather-related events and are climate controlled with advanced environmental controls.