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All these user manuals say to avoid carbon monoxide you should vent indoor spaces, but if you start cracking windows all the cold outside air comes rushing in. So what's the proper way to do this - just barely crack a window 1/2 inch?

All these user manuals say to avoid carbon monoxide you should vent indoor spaces, but if you start cracking windows all the cold outside air comes rushing in. So what's the proper way to do this - just barely crack a window 1/2 inch?

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Yeah, that's what I'm using a mr heater buddy. It says it has a low oxygen automatic shutoff but I got a CO detector too just in case. Thanks, I figured a cracked window and a CO detector will cover pretty much 99% of safety bases. I know CO can be strange as it can make you start hallucinating and stuff before it actually kills you so always erring on the side of caution.