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<p>[QUOTE=&quot;skallagrime, post: 11997944, member: 84021&quot;]Lets call it an 8x8x8 box, 512 cu feet, assuming normal oxygenation of the atmospheric air when going to bed in a sealed cube, how long till its a problem?</p><p><br /></p><p><a href="https://kimberlymoynahan.com/2012/04/friday-fiction-facts-trapped-in-an-airtight-room/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://kimberlymoynahan.com/2012/04/friday-fiction-facts-trapped-in-an-airtight-room/" rel="nofollow">Friday Fiction Facts: Trapped in an airtight room! | Endless Forms Most Beautiful</a></p><p><br /></p><p>&quot;T = Number of hours before CO2 reaches toxic levels and your character(s) could die.</p><p><br /></p><p>&nbsp; (Volume of air inside the room in cu ft) x (1% or 0.01)</p><p>T = ---------------------------------------------------------</p><p>&nbsp; (Number of people) x (one person&#039;s hourly production of CO2 in cu ft)</p><p>&nbsp;</p><p>Ill use 512 cu feet, 1% cause thats mild drowsiness from co2 buildup, generally considered fine to easily recover from</p><p>And going to say a person at rest is about 1 cubic feet of co2 exhaled an hour</p><p><br /></p><p>So about 5.12 hrs, at 3 % where serious issues start arising thats almost 15 hrs.</p><p><br /></p><p>No matter how good your vehicle is sealed though, theres a LOT of air exchange already happening latently, more so the older and less well maintained the door seals are, easily enough that youre not at risk of dying in your cab unless youre also chainsmoking while hyperventilating amd dont come out or open a window for over a day or 2.</p><p><br /></p><p>Personally i sleep with everything closed and have managed to not die after 14 hrs straight with truck etc off, no webasto, was 50 degrees and wet, had had a long day.[/QUOTE]</p><p><br /></p>

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