Sauna vs cold plunge: which should you buy first?
Buy the cold plunge first. It's 30× cheaper to start, needs no electrician, and has the better-evidenced benefit. Here's the whole argument.
Last verified · Ice & Cedar editorial
Buy the cold plunge first. An inflatable tub and a bag of ice costs under $100 and tells you within a week whether you will actually keep doing this. The cheapest barrel sauna we compare is about $2,700 before an electrician has quoted you for a dedicated 240V circuit.
That is not a physiological claim. It is an argument about risk: the question that decides your purchase is not “which is better” but “which will I still be using in six months” — and one of these lets you find out for the price of a takeaway.
Side by side
| Cold plunge | Sauna | |
|---|---|---|
| Entry price | Under $80 (inflatable tub + ice) | ~$2,700 (cheapest barrel we compare) |
| Realistic full setup | ~$350–$1,400 (tub + chiller) | ~$2,700–$5,000 + electrical |
| Electrician needed | No — ice, or a 110V chiller | Yes — dedicated 240V circuit |
| Circuit | Standard outlet, or none | 6kW → 25A draw → 35A dedicated |
| Running cost | ~$20.62/mo (continuous) | ~$8.84/mo (3×/week) |
| Space | A tub. Deflates and stores. | A permanent outbuilding on a level base |
| Time to first use | Same day | Weeks — delivery, base, electrician |
| Best-evidenced benefit | Reduced muscle soreness post-exercise | We make no comparable claim |
| Main catch | May blunt hypertrophy if done right after lifting | The circuit, and the price |
The running cost surprise
Most people assume the sauna is the expensive one to run, because 6kW is a big frightening number and a chiller is a small quiet box. The arithmetic disagrees, and the reason is the shape of the usage.
A sauna costs you when you use it — three hours a week of a 6kW heater cycling is about $8.84 a month. A chiller costs you continuously, because water gains heat whether or not you get in. At around $20.62 a month they land close together, and the chiller keeps charging you during the month you skipped.
Full working on both: cost to run a sauna and cost to run a cold plunge. The chiller figure is the softer of the two — no manufacturer publishes a rated wattage, so it models the class rather than a product.
The evidence, honestly
Cold water immersion has real, specific evidence for reduced muscle soreness and improved perceived recovery after hard exercise. It also has evidence pointing the other way for muscle growth when used immediately after resistance training — we go through that meta-analysis in detail, including the part where its credible interval crosses zero.
For sauna, and for contrast therapy specifically, we have not put a comparable evidence claim anywhere on this site, and this page is not the place to quietly introduce one. The honest position is that the cold side has the better-documented case for the thing most buyers are actually shopping for. Sauna’s case is that people like it and keep doing it, which is not nothing — adherence is most of the benefit of any recovery habit — but it is not the same kind of claim, and we are not going to blur them together.
The order that actually makes sense
Start with a tub and ice. Under $100. Six weeks later you will know whether this is a habit or a phase, which is information no amount of reading buys you.
If it stuck, add a chiller. This is the upgrade that matters, and not for the reason people expect: it removes the errand. Temperature becomes a setting instead of an outcome, and the friction that kills the habit disappears.
Add the sauna when you have the circuit. By then you know you use the cold side, you have had an electrician look at your panel, and you are buying a $3,000 outbuilding on evidence rather than on enthusiasm.
Frequently asked questions
Sauna or cold plunge — which should I buy first?
The cold plunge, for most people. It costs an order of magnitude less to get started (an inflatable tub is under $80; a barrel sauna starts around $2,700), it needs no electrician if you start with ice or a 110V chiller, and its best-evidenced benefit — reduced muscle soreness after hard exercise — is better supported than anything specific to sauna. Buy the sauna second, when you have the budget and the circuit.
Which is cheaper to run, a sauna or a cold plunge?
They're closer than people expect, and the cold plunge is not automatically the cheaper one. A 6kW sauna three times a week runs about $8.84 a month; a half-horsepower chiller cycling six hours a day runs about $20.62. The difference is the shape: a sauna costs you when you use it, while a chiller costs you continuously — including on weeks you never get in.
Do you need both for contrast therapy?
By definition, contrast therapy needs both a hot and a cold exposure. But you do not need to own both: a hot shower is a legitimate hot side while you start with the cold plunge. Some chillers also heat — two of the five we compare publish ranges up to 104-105°F, which is one appliance covering both halves.
Which has better evidence behind it?
Cold water immersion has the more specific evidence base for the thing most buyers want: meta-analyses find it reduces muscle soreness and biochemical damage markers after hard exercise. That comes with an important caveat — used right after resistance training it may blunt the muscle growth you trained for. We have not made a comparable evidence claim for sauna anywhere on this site, and we are not going to start here.
What's the real cost difference to get started?
Large. Cold plunge: an inflatable tub from under $80, ice from the gas station, total under $100 to find out whether you'll stick with it. Sauna: the cheapest barrel we compare is about $2,700 plus a dedicated 240V circuit and an electrician. That asymmetry, not the physiology, is why the cold plunge is the sensible first purchase.
Can I put a sauna and a cold plunge on the same circuit?
No. A sauna heater needs a dedicated circuit — it draws 25-50 amps continuously for hours and shares with nothing. If you're planning to eventually run both, that's a conversation to have with your electrician once, at the start, rather than twice.
Related
Sources
- Piñero A, et al. Throwing cold water on muscle growth. European Journal of Sport Science, 2024. — Basis for the hypertrophy caveat on the cold side. (accessed 2026-07-16)
- Cleveland Clinic — What to know about cold plunges — Temperature and duration guidance, contraindications. (accessed 2026-07-16)
- U.S. Energy Information Administration — Electric Power Monthly, Table 5.6.A — US average residential price, April 2026 (released 2026-06-25). Your utility rate is the number that matters — override the default. Running costs above computed at 18.83 cents/kWh. (accessed 2026-07-16)
- Manufacturer listings for every unit priced above (Amazon detail pages) — Entry prices read from live listings on 2026-07-16. (accessed 2026-07-16)