Why does it HAVE to be done indoors? I dont understand this. Having to make oil in odd places is, again, throwing caution to the wind. If you dont have the right place to do it, you shouldnt. Even with windows and doors open in a residence there will be a buildup. Outside = safer. I dont think i could ever need to make how ever much moneys worth of wax and have it be worth riskng my life and future. F u c k that. The only way i could see it indoors is in a lab type of environment with a serious exhaust going and even then the fan itself is sketch because it runs off electricity. I just think if you want to dramatically reduce risk, do it outdoors. Im a risk taker but im not gonna take unnecessary ones. I like to measure twice and cut once.