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One interesting thing about air filters is that many of the ones on Amazon can't be shipped to California. CA has strict standards for air filters apparently, s
by tdeck 5y ago
One interesting thing about air filters is that many of the ones on Amazon can't be shipped to California. CA has strict standards for air filters apparently, so I always viewed this as a red flag. But it turns out those certification standards don't actually include filter effectiveness:
https://ww2.arb.ca.gov/list-carb-certified-air-cleaning-devices https://ww2.arb.ca.gov/list-carb-certified-air-cleaning-devi...
- thaumasiotes 5y ago> I always viewed this as a red flag. But it turns out those certification standards don't actually include filter effectiveness Not too long ago I looked up the legal standards for (US) butter grading. Turns out they are exclusively based on a taster's professional opinion of the butter's flavor. This seems like a piece of regulatory apparatus we could do without.