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Bunny PAPR and its fittings are made via 3D printing. The loop, fan mount and fan flange remain inside the bag and are reused after cleaning

Bag penetrator filter adapter and flutter valves are outside the bag and must be replaced or sanitized between uses. Soak PETG parts in 70/30 IPA x 5 min+ if reuse is desired. Ideal is to print enough penetrators so they can be single use.

3D print files for the Bunny PAPR are available at

I print PETG with higher temperature than usual to enhance interlayer fusion. My usual nozzle at 255C/260C, bed 85C/90C, 0.2 mm layer height, 3 perimeters, 4 top / bottom layers, 20% gyroid.

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