well i wouldn't have to make a room airtight. I would just buy one of the premade altitude tents that are airtight made for this purpose, they are cheap and only about 200, its the generator that is expensive, and 4000. Blood doping is out of the question, its unethical. I'm a cyclist too, we need not go into the damage that blood doping has done to my sport. Its kinda funny too, my mom works for Amgen, the company that makes procrit, with the more common term of epotin. I could jump 60% in RBC, but why would i want to die, and why would i want to get the biggest bullshit from every competitor around me. Not worth it.