Since I think all y'all would be the most mature and knowledgable board about this:
I need to settle this debate for our families emergency kits when a snowstorm or power outage hits. (I checked for a stupid questions thread but there wasn't any)

I am arguing in favor of getting two butane gas stoves/burners for general use, see picrel
The reason for this is that I want to be able to cook indoors for obvious security reasons. We all live in the same, but pretty cramped subdivision, and everyone can look into eachothers front and back yards.

However, my brother is having a mental breakdown how carbon dioxide will kill us if we'd cook indoors without mechanical ventilation or a range hood after a power outage. Regardless of cracking a window or two.

For indoor use I would prefer to use one of those flat stoves rather than something tall like those stoves that you screw on top of a canister, due to its much higher center of gravity. I know there are some safety concerns with those flat stoves, but to my knowledge that is caused by using pots or pans on the stove that are way too large, reflecting and conducting a lot of heat back down to where the gas canister is, causing it to burst under pressure, and the gas igniting from the lit burner, causing a nice thermobaric effect I suppose.

Let's focus the discussion purely using a propane (butane too I guess) stove indoors in an emergency with regard to breathing safety.

Are there any risks if you just cook in one room upstairs with the window(s) open?
Do the risks outweigh the safety/security offered by cooking indoors to your opinion?