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Some gas fireplaces have been sold that are designed to be used without venting, on the argument that they aren't producing more CO/CO2 than a gas oven would. I've never been convinced that I believe the argument, and would definitely recommend installing a combined CO/gas alarm as a basic safety precaution; compared to the cost of the gas fireplace, they're ...


Well you and the dogs aren't dead, so that's a good sign. I wouldn't keep doing it, though. Venting carbon monoxide into your living space isn't great for your health.


If they are not dead, and you are not dead, none of you got poisoned enough to matter. Just don't do that again. Buy a carbon monoxide detector (or two, or three), and put a note on the fireplace reminding you to open the flue.

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