We build 30 to 40 cold plunges a month, and a growing share of them go into gyms, spas, and wellness clubs. We're on a first-name basis with most of the operators who run them. The questions facility buyers ask are different from residential questions, and most of the industry answers them with a logo wall and a price.
What makes a cold plunge "commercial"?
In most of this industry, "commercial" is a marketing word borrowed from the appliance world. It gets stamped on anything a seller wants a gym to buy. When we say it, we mean two specific things.
Commercial-capable describes the build: materials and components that survive high-volume daily use. Every BlueCube qualifies. 316 marine-grade stainless in the C-series, 14-gauge, welded in-house. Dedicated pumps and chillers instead of an integrated all-in-one. Full-size plumbing that can move real water volume. These tubs are overbuilt on purpose: people climb in and out of them all day, year after year, at gyms and contrast spas across the country, and the machines don't care.
Commercial-compliant describes what a public-facing business needs: a build your county health department will approve. That's our C2X and C3X — the C2 and C3 with the commercial package: an upgraded tub material and automatic chlorine dosing, built to meet health-code sanitation requirements. Our upright models handle commercial workloads, but they aren't configured for compliance the way the C2X and C3X are.
If you're buying for a private home gym, capable is all you need. If the public pays to use your facility, you need compliant.
What will the health department require?
There is no national standard for cold plunges. There isn't even a state standard in most places. Compliance runs county by county, and two facilities fifty miles apart can face different requirements.
Nearly every health department we have dealt with treats a commercial cold plunge like a spa, and spa rules want a measurable sanitizer residual in the water at all times. The common reference range is 3–10 ppm free chlorine at pH 7.0–7.8 — that's the CDC's model aquatic code (MAHC 2023), and states like Oregon and Washington have adopted the same numbers. Ozone runs continuously in every BlueCube and does most of the actual work, but it leaves no residual to test, so health departments don't count it. The code itself says ozone and UV "do not modify any other water quality requirements." Chlorine is the compliance tool. That's the entire reason the C2X and C3X exist.
The process that works: call us before you talk to your county. We'll send our specs and technical drawings. You submit them to your health department and find out exactly what your jurisdiction requires — sanitation, drains, signage, sometimes turnover documentation. Because we build everything in-house, we can produce the drawings, answer the inspector's questions, and adjust the build to what your county asks for. A dropshipped tub can't do any of that.
One warning from watching operators go through this: don't skip steps, and don't buy first and permit second. The facilities that sail through inspection are the ones that brought their health department a plan.
How many people can a cold plunge handle per day?
Ten or more users a day is commercial territory. The engineering question underneath is body heat: every person warms the water, and the chiller has to pull that heat back out before the next person gets in.
A properly sized BlueCube holds its set point through normal commercial traffic. Most facilities we serve run their tubs at 42–48°F all day. Operators expecting a rush do what we'd do: set the chiller to its lowest temperature ahead of time so it's fighting bather load in real time with headroom to spare.
There is a ceiling. Put fifty people through back-to-back and you're adding body heat faster than any chiller on the market can remove it from under 200 gallons of water. At that volume the answer isn't a bigger chiller, it's a second tub — and by then the line for the plunge is longer than your members will tolerate anyway. Tell us your expected traffic and hours and we'll size the installation honestly, including telling you when one tub is enough.
What does maintenance look like at commercial volume?
Plan for it the way you'd plan for towel service: real, daily, and fine if someone owns it.
The cadence that keeps commercial water clean: change the water roughly every 50 plunges. Rinse and rotate filters on a weekly cycle at moderate traffic, more often at high volume. Dose Bio Maintain weekly by bather load. Flush the lines with warm water quarterly, monthly at high volume — body fat coats plumbing at commercial rates, and sanitizer doesn't dissolve grease. The full routine, including the chemistry, is in our guide to keeping cold plunge water clean.
The single cheapest thing a facility can do: put a rinse station next to the plunge and require members to use it. Facilities with a rinse station go noticeably longer between water changes, because most of what fouls the water walks in on people's skin.
We designed for the person who actually does this work. Component bays open without tools. The filter housing has shutoff valves on both sides so a filter swap doesn't require a drain. Any pool and spa technician, plumber, or GC can service the machine, and when a part reaches the end of its life, it unbolts and a new one goes in. Your staff will be doing water changes for years — the machine should make that easy, and ours does.
What do gyms and spas get wrong?
The most common mistake isn't the tub they pick. It's buying the tub without deciding who maintains it. An ice bath at a busy facility is a piece of operating equipment, like the HVAC or the laundry. Facilities that assign it an owner, a schedule, and a rinse station have a great amenity for a decade. Facilities that treat it as furniture call us in month three asking why the water's cloudy.
The second mistake is buying an integrated all-in-one built for a backyard and putting it in front of paying members. Underpowered integrated chillers, small filtration, plumbing lines under half an inch — those builds fall behind commercial bather loads, and when they fail, the seller's warranty response is a support ticket and a wait. Ask any seller you're considering three questions: where is it built, what are the components, and who answers the service line on a Saturday. Then call their service line on a Saturday.
The third is siting. A chiller needs airflow and shade; a tub needs drainage, a dedicated 20-amp circuit, and a floor that takes the filled weight. None of this is hard, and all of it is cheaper to plan than to retrofit. Send us the floor plan and we'll flag the problems before the concrete guy does.
Which BlueCube fits a facility?
| Model | Built for |
|---|---|
| C2X | The standard commercial pick: sit-in 316 stainless, RiverMode Plus, commercial package with auto chlorine dosing |
| C3X | Our largest sit-in, same commercial package — the choice for taller clientele and higher traffic |
| Modular | Components separate from the tub — the mod box goes behind a wall, indoors, or outside, wherever the space wants it |
| Limitless | The flagship upright, commercial-capable, for facilities that want the statement piece |
The commercial package on the C2X and C3X adds $4,500 to the base tub and bundles the tub-material upgrade with the compliance sanitation build.
They're working in the field now: dual C2 installations running coed contrast recovery at Korrect Fitness in Austin. Two tubs beside the sauna at Hooga House, running through Midwest winters outdoors. A unit at Dodger Stadium that players use before and after training. And Joe Rogan has used his every day for about four years now.
Where to start
Call us with three things: your expected daily traffic, your county, and the room. We'll recommend the model and count, send the technical drawings for your health-department submission, and tell you what the install needs before you spend on any of it. We answer our own phones, and the people who built your machine are the ones who'll be servicing it for the next decade.
Call us · C2X · C3X · Modular · Water care at commercial volume
