It's fairly common for people to be killed by CO poisoning from unflued LPG heaters, recently I heard some were using a LGP patio heater inside their house & died because of it.I'm well aware of the downside to them. I'm much more worried about getting into my car, or on my m/c and getting hit by an idiot who wasn't paying attention to driving and was on their "smartphone".
BTW......I've been using a propane heater of some sort in my garages for over four (4) decades. The secret is, you gotta be smarter than the tool you are using.![]()