Start with high quality lump charcoal, 100% carbon. Calculate the volume of your tent (basic measurements, H x L x W: forget trying to calculate the exact irregular shape of the tent - we don't need to get into calculus here). Procure tent with as few vents as possible and attached ground sheet. Seal any vent screens of tent along with any seams. Put signs up warning others of CO gas. Use the formula .135 kg/m^3 to calculate the MINIMUM amount of required charcoal for the given volume of your enclosure. Multiply your result by a factor of 4 for assurance. Set aflame all charcoals OUTSIDE until they are burning/glowing red/white hot and stop producing smoke. Move the glowing coals INTO the enclosure and set containers on a brick pad. Wait a period of time for the CO to build up. DON'T put charcoals in the room outside the tent. Throw a tarp over the tent. If you have a CO analyzer, measure the CO level inside the tent and wait until the level reaches 10000 ppm. The probe should be inserted through a hole in the tent, sealed around the hole, and the meter should be on the outside of the tent. If the CO level doesn't get up to 10000 ppm, ABANDON your attempt. You need more charcoal. Doing this indoors is dangerous. You're going to be inside a room that will have some CO in it, which can render you unconscious, but not kill you. It can SERIOUSLY harm you short of killing you. CO is best done outside.
If all goes well, meaning CO level of 10000 ppm is attained, get into tent quickly and get flap resealed quickly, all done while holding your breath. Once inside take a few deep breaths, which should render you unconscious. Death should follow relatively quickly after going unconscious.
) so be ready for that.
