Please use Google Translate, my English is not good, I am worried that it may cause misleading information.

Explanation

This air purifier is suitable for a 12cm fan, with HEPA + activated carbon double filtration, the size is minimized as much as possible.

Materials

4x M3x35mm screws
4x M3x40mm screws
4x M3 nuts

HEPA filter with a thickness of 17mm (automotive air conditioning filter hepa filter net high efficiency low resistance pm2.5 filter paper)
1.5mm diameter columnar activated carbon (detoxifying agent activated carbon bulk detoxification box charcoal tank dedicated columnar)
12cm fan
Disposable medical mask

Installation

1. Embed 4 nuts into a, used to fix the fan
2. Cut the HEPA filter to the appropriate size, be as accurate as possible, and place it in a, (a1 requires 60mm screws)
3. Cut the mask, use the mask filter fabric as a filter for the activated carbon, put a layer of non-woven fabric on a, and put on b
4. Carefully pour the activated carbon into the honeycomb grid of b, place a layer of non-woven fabric, put on c, and screw in 4 M3x40 screws from c.
5 Fix the fan and filter to the chassis

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