Chillers
Cold plunge chiller vs ice
Two ways to get water cold, with completely different cost shapes. The break-even is closer than most people expect if you plunge often.
By Scooter M. · Published · Last updated
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| # | Product | Rated draw | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 |  The Pod Company Standard Water Chiller, 1/3 HP 280 watts, a published 41 F floor and a 20-micron filter. It is less than half the draw of every other chiller here, and the listing volunteers the comparison. | 280 W | Cheapest to run | 7.2 | Check price |
| 2 |  AS ColdPlunge 1/3 HP Cold Plunge Chiller 600 W, a 42 F floor, a reusable metal filter instead of cartridges, and a submersible pump in the box so it works with a bathtub that has no ports. | 600 W | Best for a bathtub | 7.7 | Check price |
| 3 |  600 GPH Cold Plunge Filter with UV Sanitation A 600 GPH pump and filter with UV sanitation for tubs from 300 to 1,000 gallons, for anyone running ice rather than a chiller. | Not published | Filtration without a chiller | 1.0 | Check price |
Two completely different cost shapes
What we can compute, and what we will not
The chiller side is arithmetic. Published wattages across the chiller roundup run from 190 W to 1,200 W. At 18.34 cents per kWh:
Your own break-even, in one line
months to break even =
chiller price / ((ice cost per session x sessions per month) - chiller run cost per month)Put your real numbers in. If ice costs you four dollars a session and you plunge four times a week, that is about sixty-nine dollars a month. Against a 280 W chiller running six hours a day at nine dollars and change, you are saving roughly sixty a month, and a four-hundred dollar chiller pays for itself in about seven.
Change any of those inputs and the answer changes. That is the point of giving you the formula instead of the answer.
The reasons a chiller wins that have nothing to do with money
- Consistency. The same temperature every session, set on a display, is a different practice from guessing at how much ice to add. If you care about progression, it is the only way to know what you are progressing from.
- No errand. The failure mode of an ice setup is not cost, it is a Tuesday evening when you have not been to the shop. Habits die of friction.
- Filtration comes with it. Every chiller in our roundup includes some filtration. An ice setup has the same fouling problem and none of the equipment - see cold plunge maintenance.
- It holds between sessions. With a lid on a chilled tub, tomorrow is a top-up rather than a fresh start.
Where ice still wins
Two situations, and both are real. If you are not yet sure you will keep this up, ice in a bathtub costs nothing to try and answers the question in a week. And if you plunge occasionally rather than habitually - once a week, after a long run - a chiller running to hold temperature for six days to serve one session is genuinely worse economics as well as worse sense.
The middle path a lot of people end up on: an insulated tub with a clamped lid, ice for the first few months, and a chiller added once the habit is established. Buy the tub with real ports so that upgrade does not mean buying the tub twice - the inflatable roundup covers which ones have them.
Every pick, in full
Each write-up below shows the score broken into its six components, the specs the listing actually publishes, and the running-cost arithmetic where a wattage exists to compute it from.
#1 - Cheapest to run
The Pod Company Standard Water Chiller, 1/3 HP
280 watts, a published 41 F floor and a 20-micron filter. It is less than half the draw of every other chiller here, and the listing volunteers the comparison.
| Small-space fit | 12 / 20 |
|---|---|
| Electrical fit | 20 / 20 |
| Cost to run | 20 / 20 |
| Key-number disclosure | 12 / 15 |
| Spec completeness | 8 / 15 |
| Warranty | 0 / 10 |
| Total | 72 / 100 |
| Rated watts | 280 Seller’s listing, read 2026-09-07 |
|---|---|
| Water capacity | Not published Not published |
| Dimensions | 13 x 13 x 21 in Seller’s listing, read 2026-09-07 |
| Weight | 40 lb Seller’s listing, read 2026-09-07 |
| Cooling floor | 41 Fno cooling rate published Seller’s listing, read 2026-09-07 |
| Material | Not published Not published |
| Warranty (months) | Not published Not published |
| Rated draw | 280 W |
|---|---|
| Cost per hour at full draw | 5.1 cents |
| Upper bound, running continuously | $37.47 per month |
A chiller cycles. It draws its rated power while the compressor runs and almost nothing while it does not, and how often it runs depends on ambient temperature, insulation, lid use and setpoint. We do not measure duty cycle, so we publish the two figures that need no assumption and no figure in between. Computed at 18.34 cents per kWh (June 2026). The method.
Two hundred and eighty watts is the number that decides this category. At the current US residential average it costs about five cents an hour at full draw, and even running continuously for a month - which no chiller does - the absolute ceiling is around thirty-eight dollars. The 1,200 W units in this roundup are four times that.
The listing's own comparison is a good one: about the same as a home freezer. That is a useful mental model, because a chiller works the same way and cycles the same way. It draws its rated power while the compressor is running and almost nothing while it is not, and how often it runs depends on your lid discipline, your room temperature and how well your tub is insulated.
The published floor is 41 F, which is warmer than the 37 to 39 F claimed by the bigger units. For most people that is irrelevant - the commonly recommended starting band is 50 to 59 F and experienced plungers usually settle around 45 to 50 F - but if you specifically want to get below 40, this will not do it.
Buy it if
Anyone whose plunge is a daily habit rather than an occasional event, where running cost compounds.
Skip it if
You want water below 41 F. This unit does not claim to go there.
#2 - Best for a bathtub
AS ColdPlunge 1/3 HP Cold Plunge Chiller
600 W, a 42 F floor, a reusable metal filter instead of cartridges, and a submersible pump in the box so it works with a bathtub that has no ports.
| Small-space fit | 12 / 20 |
|---|---|
| Electrical fit | 20 / 20 |
| Cost to run | 16 / 20 |
| Key-number disclosure | 12 / 15 |
| Spec completeness | 11 / 15 |
| Warranty | 6 / 10 |
| Total | 77 / 100 |
| Rated watts | 600 Seller’s listing, read 2026-09-07 |
|---|---|
| Water capacity | 79 Seller’s listing, read 2026-09-07 |
| Dimensions | 11.8 x 14.9 x 12.6 in Seller’s listing, read 2026-09-07 |
| Weight | 35 lb Seller’s listing, read 2026-09-07 |
| Cooling floor | 42 Fno cooling rate published Seller’s listing, read 2026-09-07 |
| Material | Not published Not published |
| Warranty (months) | 12 Seller’s listing, read 2026-09-07 |
| Rated draw | 600 W |
|---|---|
| Cost per hour at full draw | 11.0 cents |
| Upper bound, running continuously | $80.29 per month |
A chiller cycles. It draws its rated power while the compressor runs and almost nothing while it does not, and how often it runs depends on ambient temperature, insulation, lid use and setpoint. We do not measure duty cycle, so we publish the two figures that need no assumption and no figure in between. Computed at 18.34 cents per kWh (June 2026). The method.
The submersible pump is what makes this the bathtub answer. A chiller normally needs a tub with inlet and outlet ports; a bathtub has neither. Dropping a pump into the water and running two hoses over the rim is inelegant and it works, and it is the cheapest route to a cold plunge for anyone who cannot give up floor space for a tub at all.
Six hundred watts is eleven cents an hour at full draw, comfortably mid-range here. The 79-gallon rating is a good match for a standard bathtub, which holds somewhere between 40 and 80 gallons at plunge depth.
The reusable metal mesh filter rather than disposable cartridges is a genuine running-cost detail that gets ignored because it is not electricity. Cartridge filters are a recurring purchase; a rinsable metal screen is not, and over a year that difference is larger than the difference in power draw between two chillers.
Buy it if
Anyone plunging in an existing bathtub rather than buying a tub.
Skip it if
Your tub is over 79 gallons.
#3 - Filtration without a chiller
600 GPH Cold Plunge Filter with UV Sanitation
A 600 GPH pump and filter with UV sanitation for tubs from 300 to 1,000 gallons, for anyone running ice rather than a chiller.
| Small-space fit | 8 / 20 |
|---|---|
| Electrical fit | 0 / 20 |
| Cost to run | 0 / 20 |
| Key-number disclosure | 0 / 15 |
| Spec completeness | 2 / 15 |
| Warranty | 0 / 10 |
| Total | 10 / 100 |
| Rated watts | Not published Not published |
|---|---|
| Maximum temperature | Not published Not published |
| Dimensions | Not published Not published |
| Weight | Not published Not published |
| Timer | Not published Not published |
| Cooling floor | Not the relevant number for this category |
| Material | Not published Not published |
| Warranty (months) | Not published Not published |
No running cost can be computed. The listing does not publish a rated wattage, so there is no honest way to tell you what a session costs. We will not estimate one. How we compute running costs
Chillers come with filtration built in. Ice does not, which leaves ice-only plungers with the same water quality problem and none of the equipment, and it is why a standalone filter belongs in this category rather than being an afterthought.
Six hundred gallons per hour turns over a 100-gallon tub six times an hour, which is well above what a plunge needs, and the UV stage handles what a mechanical filter cannot. Running it for an hour after each session is enough to keep water clear for weeks.
The wattage is not published, so we cannot give you a running cost, but a pump in this class is a small load - tens of watts rather than hundreds - and it runs for an hour rather than continuously.
Buy it if
An ice-only plunger whose water is going cloudy between refills.
Skip it if
Your chiller already includes filtration. Most in this roundup do.
Questions people actually ask
Is a cold plunge chiller worth it compared to ice?
If you plunge three or more times a week, almost certainly. A chiller's running cost is a few cents an hour and ice is a recurring purchase and a recurring errand. The break-even depends entirely on what ice costs where you live, but at typical bagged-ice prices and a daily plunge, most setups pay back the chiller within a year.
How much ice do you need for a cold plunge?
It depends on your starting water temperature, your tub's insulation and how cold you want to get. There is no universal figure and anyone quoting one without those inputs is guessing. What is predictable is the direction: warmer tap water, a warmer room and a poorly insulated tub all multiply it, which is why insulation and a clamped lid matter more to your ice bill than anything else you can buy.
How much does it cost to run a cold plunge chiller?
Between about 3.5 and 22 cents an hour at full draw, from published wattages of 190 W to 1,200 W at the US residential average of 18.34 cents per kWh. A chiller cycles rather than running continuously, so real consumption is lower and depends on insulation, lid use and room temperature.
Can you cold plunge without a chiller?
Yes. Cold tap water in winter is under 60 F in much of the US, which is already within the beginner band, and ice takes it lower. A chiller is a convenience and a consistency purchase, not a requirement - what it buys you is the same temperature every day without an errand.