Designing an effective humidifier system for a submersible involves addressing the issue of moisture condensation on transparent surfaces due to low temperatures at depths of around 100 meters. The heat from human bodies can create fog, necessitating a humidity control solution. A simple design is sought, ideally accompanied by a schematic diagram. There is a suggestion to consider using a store-bought dehumidifier as a potential solution. The discussion highlights the need for clarity on whether to humidify or dehumidify the environment within the submersible.