How long a person can stay in a sauna depends on the person and the type of sauna. We own a small, one person, far infrared sauna which I believe offers more benefits than a steam sauna. Because infrared sauna therapy heats the body directly rather than simply warming the air, it raises the core body temperature and produces a deep, detoxifying sweat at the cellular level, where most toxins reside. Far infrared also aids in blood pressure reduction, detoxification, pain relief, anti-aging & skin purification, wound healing and helps improve circulation. I personally spend 30 minutes per session in our infrared sauna - I've never used a steam sauna, so I'm not sure what the recommended time is for a steam sauna. We purchased ours several years ago to assist my spouse in detoxing from heavy metal toxicity and it helped speed that detoxification process up tremendously.