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by jsingleton
2007 days ago
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There is some interesting info on building a cheap ~$20 purifier here: https://airpollutionguide.net/ I haven't tried as cheap HEPA filters appear to be harder to get hold of in the UK. Maybe due to different heating systems. Clearing the Air: The Beginning and the End of Air Pollution by Tim Smedley is an excellent book if you are interested in this area. |
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