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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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[–] • 0 pt

If it's burning clean there is only CO2 and water produced, no need for a vent. Many high efficiency propane space heaters are ventless.