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Low-tech air filter for bad air quality emergencies
- peter_d_sherman 6y agoMacGyver Recipe: Box Fan + Ordinary Store Bought HVAC Air Filter + Duct Tape = Low-tech air filtration device. Excellent idea! (Also, wild guess here, but wetting the filter might slightly decrease the particle size of air contaminant permitted through; that is, it might slightly increase the efficacy of the filter -- but without testing against real world air polutants in real world scenarios, I wouldn't know that for a fact...)