Quote:
Originally posted by youbetcha
The filters installed at the factory are black because they have charcoal in them.
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I wonder if the activated carbon (charcoal) in only the initial "from the factory" filter is associated with off-gassing of the new plastics and foams as they cure (e.g. formaldehyde and the other chemicals that comprise the "new car smell"). Just a hypothesis, and I have no idea how one would attempt to verify it.