From the Loftsmith community

Fan filter box with cage, USB-C bay and 18650 holder

Turns a box fan into a small air cleaner you can run off a battery. A slotted cage holds a square filter in front of the fan, and a bay beside it takes an 18650 cell and a USB-C charging board. Change the filter width and height to match your filter.

4 parts · 108 g · 129 × 53 × 104 mm

Blue slotted fan cage with a dark battery and USB-C bay with orange caps on both sides
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No adjustable sizes

Ask for the sizes you want to tweak, e.g. “make the width adjustable”.

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