SubZero™ Ultra Series

SubZero™ Ultra is the pinnacle of the SubZero platform, bringing together every advanced feature and engineering refinement into a single, uncompromising series. With a four-pump system—including two jet pumps, a dedicated circulation pump, and an additional Silent Stream pump—Ultra delivers increased jet count, expanded therapy zones, and exceptional water movement with minimal noise. A fully insulated sandwich-style foundation, advanced perimeter insulation, suction-free design, and pressurized filtration combine to create our most comfortable, efficient, and capable hot tub—engineered for those who want the very best SubZero has to offer.