Graf ANAEROBIX, Instructions For Assembly, Operation And Maintenance

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6 . Operation and maintenance
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2017-09
The system should be ventilated. Additional ventilation ducts or openings should be arranged if required.
The ventilation ducts should be arranged so that natural ventilation is possible (chimney effect).
Ventilation with unobstructed outflow Ventilation in the case of infiltration or with obstructed
outflow