Soot-covered air filter
I swapped it out in July and it should still have had a few weeks/months left in it, but the fires apparently have caked it up. Based on previous changes of filters in the house every 3 months, this looks like about 2 years or more of dust build up. Changed it because the filter seemed to be whistling in the ducting.

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Chris Aldrich

I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media.

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