Cold plunge · Best-of

Best Cold Plunge With a Built-In Chiller

This list excludes every tub that has no chiller (the ice-only units marketed as cold plunges). Every product here has a built-in chiller that maintains a set temperature, so the comparison is apples to apples.

How we score: We require a built-in chiller, then rank by composite score.

1. 18.5

   Renu Therapy Cold Stoic 2.0

   A heavily insulated plunge with an integrated chiller, three-stage filtration, and ozone plus UV, reaching about 36 F.

   • Chiller: yes
   • Min temp: 36 F
   • Running cost/yr: ~$340
   • Price: $9,499
2. 28.4

   Inergize Cold Plunge Pro

   A compact soft-sided tub paired with a chiller that cools to 37 F and heats to 105 F, with four-way filtration plus ozone and UV.

   • Chiller: yes
   • Min temp: 37 F
   • Running cost/yr: ~$330
   • Price: $3,290
3. 38.1

   Polar Monkeys Cyber Plunge

   A marine-grade stainless plunge with a built-in heating and cooling chiller holding water as low as 32 F, with ozone and filtration.

   • Chiller: yes
   • Min temp: 32 F
   • Running cost/yr: ~$300
   • Price: $15,690
4. 47.9

   Sun Home Cold Plunge Pro

   Encased stainless plunge with a 1 HP built-in chiller that drives water to 32 F, plus ozone, UV, and filtration.

   • Chiller: yes
   • Min temp: 32 F
   • Running cost/yr: ~$360
   • Price: $13,799
5. 57.8

   Hydragun Supertub Cold Plunge

   An inflatable all-in-one plunge with a built-in chiller, filtration, and ozone - one of the cheapest self-chilling options.

   • Chiller: yes
   • Min temp: 34 F
   • Running cost/yr: ~$200
   • Price: $2,999
6. 67.3

   Plunge All-In

   An acrylic cold plunge with a built-in chiller, ozone, and filtration that holds water near 37 F without ice.

   • Chiller: yes
   • Min temp: 37 F
   • Running cost/yr: ~$360
   • Price: $8,490
7. 77.1

   BlueCube C3 Cold Plunge

   A handcrafted premium plunge with a 1 HP commercial chiller, ozone, and filtration holding a steady set temperature around the clock. Heavily configurable: this is the manufacturer's base/starting price, and loaded builds (larger tub, premium trim) run toward $30,000.

   • Chiller: yes
   • Min temp: 37 F
   • Running cost/yr: ~$420
   • Price: $19,500
8. 87.0

   Edge Tub Elite

   A portable insulated tub bundled with a 1 HP Wi-Fi chiller that cools to 37 F or heats to 105 F, with micron filtration. Note: Edge Theory Labs has gone out of business - its own homepage now states so and points owners to a third party for replacement chillers. Treat this as a discontinued unit with no factory warranty or parts support; the price shown is the last-known figure.

   • Chiller: yes
   • Min temp: 37 F
   • Running cost/yr: ~$300
   • Price: $4,990
9. 95.4

   Penguin Chillers Cold Therapy Chiller

   A standalone 3/4 HP water chiller for DIY cold-plunge builds - no tub included, but the cheapest path to real cooling.

   • Chiller: yes
   • Min temp: 37 F
   • Running cost/yr: ~$150
   • Price: $1,950