Yes on the tent. I'm going to be using a tent in my garage myself. Equipment? I have 3 chimney starters and 3 metal buckets to transfer the hot coals into. I also have a CO analyzer, which will tell me in PPM, the amount of CO in the tent. Nothing less than 10000 PPM will do. I'll be using RO 100% carbon lump charcoal. Also, I'll be sealing all the seams and flaps of the tent. I'll be doing several "dry runs" to make sure I can obtain the necessary CO level AND maintain it. I'll start with the 3 chimney starters full of charcoal and if it's not enough, I'll add another one. Also, need some bricks or something to set the hot bucket of coals on inside the tent. Charcoals get started outside the tent and when they're all glowing red, throwing an immense amount of heat, and emitting no smoke, that's when they're producing copious amount of invisible, odorless CO, and when they get moved into the tent. Then a period of time is given, maybe 20 minutes, to allow the CO to build up to a lethal level. AFTER all the preceding happens, THEN it is time to quickly enter the tent, holding your breath, and getting the flap closed quickly behind you. Once you take a few breaths, you should fall unconscious, as long as the level of CO is high, near or above 10000 PPM. Death will occur within minutes. The only problem in not having a CO analyzer is that you can't know for certain what the CO level truly is. CO has been used for decades, though, and with success, even without an analyzer. An analyzer just adds more assurance.