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Airgradient: First air quality monitor to be officially compatible with Home Assistant
(www.notebookcheck.net)
this post was submitted on 07 Sep 2025
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CO2 concentration is an indicator of indoor air quality and can generally inform the quality of ventilation. Indoor plants likely won't exchange enough to be effective.
Baseline (outdoor) is around 400 ppm, 1000 ppm is generally the 'comfort limit' or where some cognitive effects start to become present (drowsiness), then over 2000 ppm is generally the unhealthy limit.