Cold plunge · chiller addon
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.
5.4
Limited
Composite (0-10), cold-plunge-v1.0
Confidence: Partial
By the numbers
- Cooling
- built-in chiller
- Coldest temp
- 37 F
- Water care
- none
- Insulated
- no
- Capacity
- n/a (chiller only)
- Material
- Stainless housing, titanium heat exchanger
- Est. annual electricity
- ~$150/yr
- Warranty
- 2 years
- Price
- $1,950
Strengths
- + Cooling: 10.0/10
- + Value: 8.0/10
Watch-outs
- - Water Care: 0.0/10
- - Build & Insulation: 0.0/10
Who it is for
- · Anyone who wants cold water on demand without hauling and replacing ice
- · DIY builders who already have a tub and want to add real cooling
Who should skip it
- · Anyone wanting low running cost - without insulation the chiller works harder
How it scored
Cooling
10.0/10 · 30%Whether the unit actively chills, and how cold it gets. An ice-only tub is not a self-chilling plunge.
- +6Built-in chiller Apowered chiller included - Cools the water actively, with no need to buy or add ice.
- +2Reaches 45 F or colder B37 F - Reaches at least the 45 F range used in most cold-immersion protocols.
- +2Reaches ice-bath cold B37 F - Reaches 39 F or colder, true ice-bath territory.
Water Care
0.0/10 · 20%Ozone, UV, and filtration that keep the water clean between changes.
- ·No sanitation or filtration Bmanual water changes only - Without ozone, UV, or filtration the water must be drained and refilled frequently.
Build & Insulation
0.0/10 · 15%Insulation (holds temperature, lowers running cost) and full-immersion capacity.
- ·Not insulated Buninsulated - Poor insulation makes a chiller work harder and raises running cost.
Value
8.0/10 · 20%Running cost - the chiller electricity brands rarely put on the box.
- +8Chiller running cost vs class A~$150/yr electricity (bottom 20% of class (best value)) - Estimated annual chiller electricity, scored against the chiller-unit median. The cost brands rarely disclose.
Practical
5.0/10 · 15%Warranty, electrical-safety listing, and plug-and-play convenience.
- +2Solid warranty B2-year - Two-year or longer warranty.
- +3Plug-and-play Bno manual ice - Runs without hauling and replacing ice.
What to know before buying
- · This is a chiller add-on only, not a tub. You supply your own vessel and connect this unit to provide the cooling.
- · A relatively low-cost route to real chilling (around $1,950), versus all-in-one units that cost more once you add a tub.
- · Manufacturer lists cooling capacity around 7,500 BTU/hr with a built-in pump and quick-connect fittings, and a minimum near 37 F.
- · The pump is not self-priming and is intended to run continuously; the chiller should sit at or below the tub, not elevated above it.
- · Not freeze-proof: the maker advises disconnecting and draining if ambient temperatures reach freezing. Filtration may be a separate add-on.
FAQ
- Does the Penguin Chillers unit come with a tub?
- No. It is a standalone 3/4 HP water chiller for DIY cold-plunge builds with no tub included, which in our scoring is a known limitation since dimensions like capacity and water care assume a complete unit. We frame it as the cheapest path to real powered cooling at $1,950.
- What does the chiller itself cost to run?
- We estimate about $150 a year in electricity, the lowest in our chiller set, and it reaches about 37 F. Because it is not insulated and ships without ozone, UV, or filtration, you supply the tub and water care yourself in a DIY build.
Last reviewed 2026-05-30. Scored under cold-plunge-v1.0. See the methodology. Informational only, not medical advice.