Inergize
Inergize Spire Elite
8.3/ 10
Best for A furniture-grade vertical plunge with seated comfort
- Minimum temperature
- 37 °F (heats to 104 °F in hot tub mode)
- Chiller
- 0.8 HP industrial Elite chiller (modular, on casters)
$7,990$9,490
ResearchInergize
Inergize is a San Diego-based cold plunge company founded by a mechanical engineer who turned a DIY chest-freezer setup into the portable Elite Tub in 2021. In 2026 it launched the Spire, a premium cedar and 316 stainless steel vertical plunge, supported by in-house US customer service and a Los Angeles repair center.
8.1
Avg score (n=2)
$2,990–$7,990
Price range
California
HQ
Inergize products
Inergize
Inergize Cold Plunge Elite
7.9/ 10
Best for Renters and travelers wanting hot-and-cold contrast therapy
- Minimum temperature
- 37 F
- Chiller
- 0.8 HP (cools and heats)
- Capacity
- 1 person (up to 6'5" / 300 lbs)
$2,990$3,990
Research