A swim spa tub combines the dual functions of swimming training and hydrotherapy, allowing for both water exercise and the relaxing experience of warm water. Built-in heaters typically maintain a water temperature of 28-36°C, but can be adjusted to a temperature close to that of a spa hot tub as needed.

Based on theoretical calculations and ergonomic analysis, the 3x3 spa hot tub pavilion has the following practical benefits: 1. Optimal comfortable seating capacity: 6-7 people; 2. Maximum safe seating capacity: 8 people; 3. Increasing the number of people significantly reduces comfort and may pose structural and safety risks.

Safety hazards of falling asleep in a whirlpool spa hot tub: 1. Risk of drowning after loss of consciousness 2. Hyperthermia-induced fainting and hypotension 3. Risk of dehydration and electrolyte imbalance 4. Hot water causes a sluggish central nervous system response

If the maintenance technical threshold and continuous labor intensity are used as the core evaluation criteria, the overall maintenance of the spa hot tub is more complicated; and from the perspective of structural stability and durability, the outdoor sauna room requires more protection and preventive maintenance.