Renu Therapy Cold Stoic 3.0 scores highest overall, while Sun Home Cold Plunge Vertical is the most affordable. These products suit different buyers, so weigh the criteria that matter most for your setup rather than the headline score alone.
| 2 products | ![]() Sun Home Saunas Sun Home Cold Plunge Vertical | ![]() Renu Therapy Renu Therapy Cold Stoic 3.0 |
|---|---|---|
| Price | $3,799 | $11,399 |
| Overall score | 7.8 | 8.4 |
| Minimum temperature (°F) | 32 F (ice-making mode) | 37 °F |
| Chiller (HP) | 1 HP smart chiller | 0.5 HP |
| Capacity (people) | 1 person | 1 person |
| Water volume (gal) | — | 95 gal |
| Filtration | Replaceable 10" x 2.5" cartridge filter (swap every 2-4 weeks) | Dual-stage filtration |
| Sanitation | Ozone injection | Ozone |
| Noise (dB) | — | ~54 dB |
| Electrical | 120V / 11A GFCI, NEMA 5-15P plug | 110V / 20A |
Sun Home Saunas
Best for Small-space owners who want the coldest water under $4,000
Renu Therapy
Best for Design-led buyers who want a long warranty
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