A chiller is the purchase that turns cold plunging from a chore into a habit. It is also the one people put off, because the good units cost more than the tub.
The cheap end is real but conditional. Most budget kits hit their price by pairing a large tub with a small chiller, and the specs never show you that ratio.
We compared 8 budget setups on exactly that: is the chiller sized for the water it has to cool? We have not run these, and each pick says what we could not confirm.
Three made the page.
Watch: Best Overall Budget Setup, the AS ColdPlunge Tub and 1/3 HP Chiller Kit
Watch "Step By Step Install Process - AS ColdPlunge Ice Bath Water Chiller" on YouTube
The short answer
Every pick below wins one job. Find the line that sounds like you, then jump to the full write-up.
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Best Overall Budget Setup
AS ColdPlunge Tub and 1/3 HP Chiller Kit
Getting off bagged ice for the least money, accepting that the tub must stay covered and shaded for the chiller to keep up.
Check price on Amazon for AS ColdPlunge Tub and 1/3 HP Chiller Kit (opens in a new tab) Typically $300 to $800Read why it won for AS ColdPlunge Tub and 1/3 HP Chiller Kit -
Cheapest Chiller Alone
EONIX 1/3 HP Cold Plunge Chiller
Someone who already has a tub they like and only needs to solve the cold, for the smallest possible outlay.
Check price on Amazon for EONIX 1/3 HP Cold Plunge Chiller (opens in a new tab) Typically Under $300Read why it won for EONIX 1/3 HP Cold Plunge Chiller -
Best Matched Pairing
EONIX Tub and 1/2 HP Chiller Kit
Someone who wants a budget kit that will hold temperature reliably rather than one that only works in ideal conditions.
Check price on Amazon for EONIX Tub and 1/2 HP Chiller Kit (opens in a new tab) Typically $300 to $800Read why it won for EONIX Tub and 1/2 HP Chiller Kit
Compare them side by side
Same fields for every tub, so you are comparing like with like.
| Product | Award | Best for | Capacity | Material | Price | Where to buy |
|---|---|---|---|---|---|---|
| AS ColdPlunge Tub and 1/3 HP Chiller Kit | Best Overall Budget Setup | Getting off bagged ice for the least money, accepting that the tub must stay covered and shaded for the chiller to keep up. | 148 gallons | Metal, Polyvinyl Chloride (PVC) | $$ $300 to $800 | Check price for AS ColdPlunge Tub and 1/3 HP Chiller Kit (opens in a new tab) |
| EONIX 1/3 HP Cold Plunge Chiller | Cheapest Chiller Alone | Someone who already has a tub they like and only needs to solve the cold, for the smallest possible outlay. | 79 gallons | Aluminum | $ Under $300 | Check price for EONIX 1/3 HP Cold Plunge Chiller (opens in a new tab) |
| EONIX Tub and 1/2 HP Chiller Kit | Best Matched Pairing | Someone who wants a budget kit that will hold temperature reliably rather than one that only works in ideal conditions. | 123 gallons | Polyvinyl Chloride | $$ $300 to $800 | Check price for EONIX Tub and 1/2 HP Chiller Kit (opens in a new tab) |
The full reviews
Best Overall Budget Setup
AS ColdPlunge Tub and 1/3 HP Chiller Kit
AS ColdPlunge AS-AY300-XL148
A tub and a 1/3 HP chiller in one purchase, at a price close to buying a decent chiller alone. The pairing is optimistic, so the lid becomes part of the cooling system.
What we like
- Tub and chiller together for roughly what a chiller alone usually costs
- Pump and filter built into the chiller, so no flow rate to match
- Runs on an ordinary household circuit with no electrical work
- Removes ice purchases entirely, which is the point of the whole exercise
What we do not
- 1/3 HP paired with a 148 gallon tub is under-matched, so it needs the lid on
- Listing publishes carton dimensions rather than tub dimensions
- No ozone or UV, so water treatment stays fully manual
Key specs
- Capacity
- 148 gallons
- Material
- Metal, Polyvinyl Chloride (PVC)
- Price range
- $300 to $800
If the aim is simply to stop buying ice and spend as little as possible, this is the entry point.
The value is in the bundling
Bought separately, a decent 1/3 HP chiller with a built in pump costs most of what this whole kit costs. Getting a tub with it is close to free.
That only holds because the tub is a soft sided one and the chiller is at the small end. It is genuine value rather than a trick, but it is value with a condition attached.
The condition
A 1/3 HP chiller is generally rated around 79 gallons. This kit puts one on a 148 gallon tub, which is nearly double.
That is not automatically a failure. Chiller ratings assume ordinary conditions, and a covered, shaded, reasonably insulated tub leaks far less heat than the rating assumes. But the margin is thin.
Practically: keep the lid on and keep the tub out of direct sun and it will hold. Do neither and the compressor runs continuously and still loses on a warm afternoon.
Why the built in pump matters at this price
Separates look cheaper and are not. You buy a pump, match its flow rate to the chiller, find somewhere for it, and run a second power lead. Get the flow wrong and the unit either ices up internally or never reaches temperature.
Having the pump and filter inside one housing removes three decisions and one failure point, which on a budget setup matters more than a small difference in capacity.
What you still pay for
No ozone, no UV. The filter catches debris, not bacteria, so water treatment is entirely on you: a sanitiser and a schedule.
Budget for that, and remember that the cheapest cooling upgrade available is not a bigger chiller, it is shade and a lid.
Buy it if Getting off bagged ice for the least money, accepting that the tub must stay covered and shaded for the chiller to keep up.
Skip it if Your tub will sit uncovered in afternoon sun, because a 1/3 HP unit will run continuously and still lose ground.
The catch A 1/3 HP chiller is rated around 79 gallons in normal conditions and this kit pairs it with a 148 gallon tub. It holds temperature on a covered shaded tub and loses on a hot uncovered one, so the lid is not an accessory here, it is part of the system.
Not tested by us. Specs checked July 25, 2026. How we research
Cheapest Chiller Alone
EONIX 1/3 HP Cold Plunge Chiller
EONIX guanjie-10
If you already own a tub, this is the least you can spend to stop buying ice. 1/3 HP on 79 gallons, and nothing else included.
What we like
- Lowest entry price here for a chiller with a real gallon rating
- 79 gallon rating matches the most common home tub size properly
- Aluminium heat exchanger transfers heat well for the money
- Runs on an ordinary household circuit with no electrical work
What we do not
- Thin owner review base with mixed early ratings, so reliability is unknown
- No published wattage, so you cannot estimate running cost before buying
- No ozone or UV, so water treatment is entirely manual
Key specs
- Capacity
- 79 gallons
- Material
- Aluminum
- Price range
- Under $300
The cheapest route from ice to no ice, assuming you already have somewhere to sit.
The right size for the least money
1/3 HP rated at 79 gallons is the sensible pairing for a standard home tub. This unit has that rating at a price below the established names, which is the whole proposition.
Aluminium heat exchangers transfer heat efficiently, so that is a reasonable engineering choice rather than a corner cut.
What you are actually risking
Not performance. Reliability.
A chiller runs for hours every day. Compressor quality, refrigerant charge and build tolerances decide whether it lasts three years or eight months, and none of them appear on a spec sheet.
The established units have enough owners for a pattern. This one does not, and the early ratings are mixed rather than clearly good. That is an absence of information rather than a verdict, and at this price you are accepting it knowingly.
The arithmetic still works
Even if this unit lasted only two years, it would likely cost less than two years of bagged ice at four sessions a week. That is the honest case for buying it, and it is a reasonable one.
If it lasts five years, it is comfortably the best value here.
What is missing
No pump specified in the listing, no published wattage, no ozone or UV. Check whether a pump is included before ordering, because if it is not, matching one correctly is the step where budget setups most often go wrong.
Water treatment is yours regardless: a sanitiser and a schedule.
Buy it if Someone who already has a tub they like and only needs to solve the cold, for the smallest possible outlay.
Skip it if You want a unit with a proven service record, because this one does not have enough history for anyone to know.
The catch The review base is small and early ratings are mixed rather than good. On a compressor that runs for hours daily, long term reliability is what matters most and it is exactly what nobody can tell you about this unit yet.
Not tested by us. Specs checked July 25, 2026. How we research
Best Matched Pairing
EONIX Tub and 1/2 HP Chiller Kit
EONIX Ice Bath Chiller
A 1/2 HP chiller with a 123 gallon tub, which is the only budget kit here where the chiller is genuinely sized for the water rather than merely attached to it.
What we like
- 1/2 HP on 123 gallons is a properly matched pairing, unusual at this price
- Holds temperature without depending on shade and a lid to survive
- Built in filter, so no separate filter housing to plumb
- Pulls a warm fill down in hours rather than overnight
What we do not
- Listing publishes no weight, so handling and siting are unknown before delivery
- Small owner review base, so long term reliability is unproven
- No ozone or UV, so water treatment remains manual
Key specs
- Capacity
- 123 gallons
- Material
- Polyvinyl Chloride
- Price range
- $300 to $800
Most budget kits hit their price by pairing a big tub with a small chiller. This one does not, and that is the entire reason it is here.
Matched, not merely attached
1/2 HP against 123 gallons is a sensible ratio. Compare that with 1/3 HP against 148 gallons, which is where the cheaper kits sit.
The practical difference is margin. A properly matched chiller holds temperature whether or not the tub is shaded, and pulls a warm fill down in hours rather than overnight.
An under-matched one works, conditionally, and the conditions are your problem to maintain.
Where that matters
If your tub sits in a shaded corner and you always put the lid on, a 1/3 HP kit will serve you and cost less.
If your tub gets afternoon sun, or you are not disciplined about the cover, or you want to fill in the morning and plunge in the evening, the extra capacity is what makes that possible.
Be honest about which describes you. Most people overestimate how consistently they will put a lid on.
The unknowns
The listing publishes no empty weight, and the dimensions it gives are the shipping carton, which we removed. That means you cannot tell whether one person can position it or whether the tub fits your space.
More importantly, the review base is thin. This is a newer product from a brand without a long history, and on a compressor that runs daily, reliability is the thing you most want to know and cannot.
Water care
No ozone, no UV. A sanitiser and a schedule, same as every unit at this price. Factor the consumables into the running cost rather than treating the kit price as the whole bill.
Buy it if Someone who wants a budget kit that will hold temperature reliably rather than one that only works in ideal conditions.
Skip it if You want the absolute lowest price, because the 1/3 HP kits undercut this and will do the job on a covered shaded tub.
The catch The owner review base is small. On a compressor running for hours daily, long term reliability is the spec that matters most, and there is not yet enough history on this kit for anyone to tell you what it is.
Not tested by us. Specs checked July 25, 2026. How we research
How we compared these setups
Eight budget options, then four tests.
Is the chiller sized for the tub? We took each chiller’s gallon rating and compared it to the tub’s volume. Anything where the tub is more than roughly double the rating we flagged, because that is a system which only works in favourable conditions.
Sellers never present this ratio, and it is the single thing that determines whether you will be happy.
Is a pump included? Matching a pump to a chiller is where budget builds fail.
What is the electrical load? Everything at this price runs on a normal circuit, which is a genuine saving over the 1 HP units.
Is there enough owner history? At the budget end, mostly no. We say so rather than implying otherwise.
The trade you are making
Budget chillers are not worse at cooling. They are less proven.
A chiller is a compressor running for hours every day. What separates a three year unit from an eight month one is compressor quality, refrigerant charge and build tolerances, and none of those are published.
The established brands have enough owners for a pattern to emerge. The cheap units do not. That is not evidence they fail, it is an absence of evidence either way, and buying one means accepting that.
Why it can still be the right call
Run the numbers rather than the feeling.
A 100 gallon tub needs roughly 20 to 40 pounds of ice per session. At four sessions a week that is around 120 pounds weekly. Price it locally and multiply by 52.
For most people, a year of that exceeds the price of a budget chiller. So even a unit that only lasts two years has likely paid for itself, and it removed the friction of hauling ice in the meantime.
That friction is worth naming. Most people who quit cold plunging do not decide it does not work. They get tired of the logistics.
The lid is part of the cooling system
At this price the chiller is usually under-matched to the tub. That means shade and a cover are not optional extras, they are what makes the system work.
Practically:
- Keep the lid on whenever you are not in it.
- Site the tub out of afternoon sun.
- Insulate the tub if it is a bare single wall model.
Do those three things and a small chiller holds temperature. Skip them and it runs continuously and still loses, and you will blame the chiller for a siting problem.
Our final recommendation
If you need a tub as well, the AS ColdPlunge kit is the cheapest complete route off ice. Accept that the lid is mandatory.
If you already own a tub you like, the standalone EONIX 1/3 HP is the smallest possible outlay. Confirm whether a pump is included before ordering.
If you would rather the system worked without depending on your discipline about covers, the 1/2 HP EONIX kit is the only properly matched pairing here, and worth the step up for that reason alone.
How we researched this page
We compared 8 budget chiller setups on the ratio of chiller capacity to tub volume, whether a pump and filter are included, the electrical load, and whether enough owner history exists to say anything about reliability.
What we worked from
- Manufacturer spec sheets
- Verified owner reports
- Retailer listing data
- Price history
8 units were compared before these 3 made the page.
What we handled ourselves
None of the products on this page. Nobody can buy every tub on the market and we are not going to pretend otherwise.
What we could not confirm, product by product
- AS ColdPlunge Tub and 1/3 HP Chiller Kit
- The listing publishes shipping carton dimensions rather than tub dimensions, so we removed them. We could not confirm real world hold temperature on a full 148 gallon fill in warm weather.
- EONIX 1/3 HP Cold Plunge Chiller
- Too few owner reports to judge reliability, and no published wattage, so we cannot compare its power draw against other units or estimate running cost.
- EONIX Tub and 1/2 HP Chiller Kit
- The listing gave carton dimensions rather than tub dimensions and no empty weight, so both were removed. Too few owner reports exist to judge reliability.
Questions people ask before they buy
What is the cheapest way to get a chilled cold plunge?
A budget tub and chiller kit, or a cheap 1/3 HP chiller added to a tub you already own. Both come in well under the price of a mid range chiller bought alone from an established brand.
Are cheap chillers reliable?
Nobody knows yet, and that is the honest answer. The budget units are recent products with small review bases. Even a two year lifespan usually beats two years of bagged ice at four sessions a week, which is the case for buying one.
Will a 1/3 HP chiller cool a big tub?
Conditionally. A 1/3 HP unit is rated around 79 gallons. On a 148 gallon tub it will hold temperature if the tub is covered and shaded, and it will lose on a hot uncovered day. The lid stops being an accessory and becomes part of the system.
Do budget chillers include a pump?
Some do, some do not, and the listings are not always clear. It matters, because matching a pump's flow rate to a chiller is the step where budget setups most often fail. Prefer units with the pump built in.
How much does a cheap chiller cost to run?
A correctly sized unit on a covered tub cycles rather than running flat out, so modest. An undersized one on an uncovered tub runs continuously and never wins, which is where the electricity cost appears.
Is it cheaper than ice?
Above roughly three to four sessions a week, yes, usually within a year. Below that, ice stays cheaper. Work out your real frequency before deciding.
Why you can trust this page
- Who wrote it
- Jed Callahan, Editor, Cold Plunge Daddy
- When
- Published July 25, 2026, updated July 25, 2026
- How we picked
- We compared 8 budget chiller setups on the ratio of chiller capacity to tub volume, whether a pump and filter are included, the electrical load, and whether enough owner history exists to say anything about reliability.
- What we looked at
- 3 products made this page after the cut.
- How we make money
- Amazon pays us a small commission when you buy through our links. Nobody pays us for a good review and no brand sees a page before it goes live.
- What we do not do
- We do not run these tubs ourselves, so we never claim we did. Every pick here comes from spec sheets, manuals, warranty terms and owner reports, and each review says what we could not check.