Oxygen is always in the air even under heavy smoke, the problem is that the air is contaminated by smoke from the forest fire. A good fitting respirator, such as N95 mask, to filter out the smoke particles is a common solution. However, under emergency situation, it may not be possible to distribute N95 masks to all who needs it. Further more, even if the mask is available, it is not easy to ensure it is fitting correctly. A non-fitting N95 mask is not effective.
Here is a simple idea to transform readily available material into an air filter, which is able to filter the air for breathing safely.
To create this DIY air filter, you need a couple of T-shirts and a plastic water bottle plus a couple of strings. Based on our test with a professional machine (Portacount Pro 8038) such DIY filter is able to reduce air pollution up to 40 folds, achieving a filtration efficiency similar to N95 masks. It is capable of bringing down the fine particles (PM2.5, PM10) from super hazardous level (PSI 1000) to moderate (PSI 75).
Link to YouTube video
Here is a step by step guide:
If you feel this idea is useful for someone you know, please share. Here is link to a PDF file for printing to share: water-bottle-air-filter. If you have more ideas or suggestions, please let me know in the comment as well.
Note: The idea of DIY water bottle air filter has been demonstrated in our Lab in Singapore to show that it is effective to cut down air pollution. However different fabric material has different filtration characteristic. This idea has not been certified by any authority. User agree to take own responsibility for the use of the idea.