Air-conditioning, air cooling and ventilation apparatus and instruments; Heaters for hot tubs; Baths, bathtubs, whirlpool baths and bath installations; Heat pumps; Personal cooling system comprising tubing, a coolant source and temperature controls that may be incorporated into a garment; Saunas; Water coolers; Cold plunge bath tubs; Refrigerating machines and installations; Spa surrounds; Bath tubs for ice baths