What duration of immersion in 104-108°F water is recommended for effective rapid active re-warming?

The recommended duration of immersion in water heated to 104-108°F for effective rapid active re-warming is typically between 15-30 minutes. This timeframe is optimal as it provides sufficient exposure to raise the core body temperature without the risks associated with prolonged exposure to high temperatures, such as heat exhaustion or burns. It balances the need for rapid re-warming while avoiding potential complications that can arise from overshooting the target temperature. Immersion in this temperature range is a critical intervention for individuals suffering from hypothermia, as it helps restore normal physiological function and promote stabilization.