True about the CO. Almost all stove have to be outside and even natural gas and butane are better outside.
During the ice storms in Quebec a few years ago people died because they set up generators inside their houses for power.
So it is not just stoves to be aware of the risk of poisoning from.
About alcohol for fuel;
Isopropyl alcohol (rubbing alcohol) tends to burn sooty and cooler than methanol or ethanol.
It is usually full of water too and unless you are going to skim it off after salting the solution you are better with methanol.
Methanol is by far the best alcohol for fuel.
You can buy clean pure methanol (wood alcohol) as fondue fuel, wood alcohol and it is in paint stores as a solvent for shellac.
You can find it as fuel line antifreeze too, but it is way to expensive that way.
It is a poison too so it must not be used for drinking.
Ethyl alcohol (grain alcohol)is the stuff that yeast makes when fed sugar. Wine, beer and whisky are all solutions of ethyl alcohol.
It is clear burning but it is usually diluted and is awfully expensive for fuel. You can buy it as Everclear which is used as booze, or as lab alcohol.
Very expensive either way.
I doubt if many of us have the skills to ferment a mash and distill our own alcohol, or the interest in doing so either.
lets talk about a real survival stove,not a sit at home and wait for the power to come back on Coleman or a hide out in the woods pop can stove but one that would be in a kit that is only opened as a last resort..you have only the fuel that is packed with it and you have to use it because for what ever reason you can't start--note i did not say have,but start a fire.wet,snow,whatever.having this will mean the difference between getting on the pick-up craft/vehicle tired,hungry and standing and not carried on hypothermic and semi-conscio
I have a pair of backpacker white fuel (multi fuel with the 1/2 liter fuel bottles.
One is Svea and the other is MSR Dragonfly.
They are both the multi fuel versions.
They are also roarer head stoves, so yes they sound like jet planes, but they put out a hellacious amount of heat for the size of them.
I have also used can candles. Not nearly as much heat, but double as light and using beeswax means little or no worry about carbon monoxide.
This means they can be used to heat a tent or inside a car.