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Questions asked by users might not always be phrased in the clearest way.
Using a ventilator instead of a fume hood for home electrolysis is extremely dangerous. Electrolysis can produce flammable gases like hydrogen and oxygen, and a ventilator isn't designed to handle these hazards. A fume hood is specifically designed to exhaust hazardous gases and prevent them from accumulating in a room. Home electrolysis should only be conducted with proper safety precautions and equipment, including a fume hood.