A shutdown system (2, 2') for shutting down at least one of pressurized air and electrical power to a habitat (10) in response to the detection of irregularities by sensors (6, 61, 62, 63), the shutdown system (2, 2') comprising a control unit (20, 20') connected to the sensors (6, 61, 62, 63), at least one of a quick responding valve (83) and a power switch (79) for controlling the pressurized air and the electrical power, respectively, to the habitat (10), where - the control unit (20, 20') is continuously operated by low voltage DC from a battery (37); - the at least one of the quick responding valve (83) and the power switch (79) is separate from the control unit (20, 20'); and - the at least one of the quick responding valve (83) and the power switch (79) is connected to, and controlled by, the control unit (20, 20') by means of a low voltage control line (75). The invention further concerns a habitat system (1) for performing hot work in an environment where unshielded hot work is prohibited, the habitat system (1) comprising a habitat (10) for creating a barrier between a volume inside the habitat (10) and the surroundings, an overpressure-air channel (4) for providing pressurized air to the habitat (10), at least one of a pressurized-air line (81) and a power line (78) for providing pressurized air and electrical power, respectively for tools for performing hot work inside the habitat (10), and a control unit (20, 20') connected to sensors (6, 61, 62, 63), of which at least one sensor (63) is positioned within the habitat (10), the control unit (20, 20') being designed to shut down the supply of at least one of pressurized air and electrical power for the hot work, the control unit (20, 20') being arranged outside the habitat (10), where the control unit (20, 20') is continuously operated by a battery (37, 37') at a voltage of 48 V or at a lower voltage. A method for establishing the habitat system (1) is described.
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