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Shop c02 detector
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See also: https://youtu.be/Iig1RzS2Jek?si=CtwENx5S0dIOGuoj (focuses on physiology of CO) Watch 3 carbon monoxide (CO) detectors react to increasing levels of CO. All 3 detectors do a great job, but the professional grade detector is the most sensitive (because it costs more/and therefore should be more sensitive). Always read the owner's manual ...
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