I live with smokers and want to make a air filter to catch the particle left in the air. I learned one good way to do this is with heavy wet cloth. But how can I turn this whole idea into a filter to protect me I need thing that can protect within a good distance maybe 10 ft or so. Any ideas?
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The only good way to protect yourself is to not be around them.
They should smoke outside or you will need a high quality respirator.
most of the nasties in residual smoke are chemical in nature and not particulate. you wont be able to catch those with a mechanical filter like you want. time to start looking for a new home or convince them to smoke outside.