Sean Hood @snhd.co · Nov 23 Umm, this doesn’t seem ideal… I thought calibration was way out so I left it in the garage for 20min where it dropped to 434ppm.
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Yikes! That’s a pretty airtight house! I sleep with the windows open now at night, regardless of the outside temp (say an article that says sleeping in the cold helps with fat burning!).
An excellent way to radicalize people to get balanced ventilation.