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Pre-departure baseline at SFO
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Boarded AS1352 SFO-BOS
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Aircraft doors are closing!
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Finally pushed back.
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Air coming out of the vents immediately after departure. (You almost certainly want to mute this thread)
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Ambient cabin air about 10 minutes into flight.
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Cabin ambient.
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3 minute average of fresh air coming out of the vent.
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(3 hours into the flight, the CO2 ppm are hovering pretty consistently at 840 fresh out of the vents and 1450 ambient.)
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Wheels down BOS.