system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: So I'm running low of gas for the stove and heater so I turned off the gas to the house til they can get here tomorrow. Do I need to worry about carbon monoxide from those sources?
gpt
If you're not burning anything then you shouldn't be worried.  Carbon monoxide forms when there isn't enough oxygen to complete the combustion.  If you're really worried you can always pop open a small window on either end of the house to keep fresh air coming in.