Turn ventilation mask to a filtration mask
thingiverse
How to Convert a Ventilation Mask into a Filtration Mask with a HEPA Filter The instructions for this conversion are conveniently located in a downloadable PDF. Converting a ventilation mask into a filtration mask with a HEPA filter requires a significant amount of time, approximately two hours, when printed at an accuracy of 0.1mm. Safety Considerations: Wearing the converted mask can be challenging due to restricted airflow, which may cause dizziness if worn for extended periods. This was observed after wearing it for about forty minutes. To alleviate this issue, spreading the filter apart slightly allows for easier breathing. When using the converted mask for the first time, the natural tendency is to take deep breaths. However, it's crucial to resist this instinct and breathe slowly through the nose instead of attempting to force air in through the mouth.
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