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No, the hose and mask have vents to allow some input. And even when it is off, you can draw air through the hose, there's just no positive pressure. It's not
by favorited 7y ago
No, the hose and mask have vents to allow some input. And even when it is off, you can draw air through the hose, there's just no positive pressure.
It's not comfortable, but it's not dangerous.