Every sector of the Mars station contains a Thermal Generator to produce the heat necessary for human habitation, and every Generator requires an intact Thermal Filter and Power to function.

At the start of the game, only two of the station's Thermal Generators remain functional - the ones in the Prison and Central Control sections. Producing and installing fresh Thermal Filters, and restoring power to sectors, will both slow the spread of infection in an area and allow West to visit the area without requiring a personal heat source.

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