Vault System
Vault of the Future

The vaults were one of the most expensive shelters in the pre-War world. According to the Vault Dweller's Survival Guide for Vault 13, the intended budget for that particular installation was 400 billion dollars, and by the end of its construction reached $645 billion. The vaults were located in various locations, and little information is available as to why those particular sites were chosen.

Each vault was designed to hold one thousand occupants at any given time, although hot-bunking was required at maximum capacity, and equipped with all facilities and supplies needed by them to survive in isolation for the designated time. According to the Vault 101 PA System, the life support system could work for over 900 years without failure. The facilities and supplies for Vault 13 included complete construction equipment, hydro-agricultural farms, a water purification system, defensive weaponry to equip 10 men, communication systems and surface monitors, social, and entertainment files (for total duration). Waste management was conducted by burning trash on scheduled "burning days". Larger incinerator receptacles were used for the destruction of human corpses. In addition, some vaults received one or two G.E.C.K.s, intended to help the inhabitants create a viable civilization in the post-nuclear world after the All Clear signal is sent.

Different types of power sources were utilized for the vaults. Vault 13 relied primarily on geothermal energy, with backup power available from a General Atomics nuclear power generator, enough to sustain the vault for two hundred years. Vault 8 on the other hand, relied on an inefficient nuclear reactor, which, while enough for Vault City to emerge, could only support a relatively small, highly advanced settlement, and in 2241 was nearing its capacity, after which further growth would be impossible.

All vault dwellers wear blue-and-yellow jumpsuits, although the design varied between different vaults. The typical vault dweller living in a properly maintained vault could expect to live an average of 92.3 years.

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