Buying a cryotherapy chamber: Nitrogen (N2) or electric?
The most important decision when purchasing a whole-body cryochamber is the technology: nitrogen-based (N2) or electric. Electric chambers operate without liquid nitrogen, are walk-in models, and are designed to accommodate multiple people; N2 systems reach very low temperatures quickly but are typically single-person units that require a continuous supply of nitrogen. This guide compares both technologies based on specific criteria for gyms, clinics, and recovery centers.
Abstract
- N2 cryosaunas reach very low temperatures, are usually single-person units (head-out), and require a continuous supply of liquid nitrogen.
- Electrical chambers are nitrogen-free, walk-in, and suitable for multiple people—they require no consumables but have a higher initial cost.
- The evidence on recovery is mixed: a benefit is plausible, but the research findings are inconsistent (Cochrane). Medical questions should be left to doctors.
- Select based on throughput, space and ventilation, operating costs, and certification. All ProReset models: Quote available upon request.
How Whole-Body Cold Therapy Works
In whole-body cryotherapy (WBC), users are exposed to extremely cold air for about two to three minutes. Depending on the technology, the temperature ranges from about -85 to -110 °C in electric chambers and can be significantly lower in nitrogen-based systems. The goal is a brief, intense cold stimulus—in contrast to the longer, less cold ice bath. This brief, intense stimulus triggers a strong reaction in the skin’s blood vessels; the body responds with vasoconstriction followed by increased blood flow, which many athletes find invigorating. To learn how cold chambers and ice baths differ as methods, read the comparison: Cold Chamber vs. Ice Bath.
Nitrogen (N₂) or electric: the two technologies
N2 Cryosaunas
In nitrogen-based cryosaunas, liquid nitrogen vaporizes and cools the cabin very quickly to extremely low temperatures. Most of these systems are single-person units designed for “head-out” use: the body is inside the cabin, while the head remains outside. This is for safety reasons—the nitrogen atmosphere inside the cabin must not be inhaled. N2 systems require a continuous supply of nitrogen and careful ventilation, as nitrogen can displace the oxygen in the room. The U.S. Food and Drug Administration (FDA) highlighted this risk as early as 2016. Oxygen sensors and professional installation are mandatory in these systems.
Electric WBC Chambers
Electric chambers generate cold using a refrigeration cycle system—without any nitrogen at all. The air remains breathable, which is why these chambers are generally walk-in and can accommodate several people at once, including their heads. There are no consumables: After the initial purchase, the main costs are electricity. The temperatures are slightly less extreme than with N2, but in return, operations are more predictable, throughput is higher, and safety protocols are simpler.
Comparison Chart: N2 vs. Electric
| Criterion | N2 Cryosauna | Electric Chamber |
|---|---|---|
| Temperature | very low (down to below -110 °C) | approx. -85 to -110 °C |
| Format | Mostly single-seat, head-out | Accessible, multiple people, including headroom |
| Consumables | liquid nitrogen (continuous) | None (electricity only) |
| Security | O2 Monitoring & Ventilation Required | Breathable air, no gas hazard |
| Operating Costs | Nitrogen Replenishment | Electricity, predictable |
| Throughput | one person per session | higher, several at the same time |
What does the evidence show?
Here, honesty is more valuable than marketing. The research on whole-body cold therapy is mixed: A Cochrane review concluded that the evidence for a clear benefit in treating post-workout muscle soreness is limited and of low quality. A review article from *Frontiers in Physiology* (2017) classifies WBC more as a complementary stimulus in the recovery regimen. Many users subjectively report a sense of well-being and faster recovery; however, no medical claims of healing can be derived from this. Medical indications and contraindications should always be determined by a physician. For business operators, this means: Communicate the benefits honestly as part of a holistic recovery plan and not as a medical promise of healing—this protects against legal risks and strengthens your customers’ trust in the long term.
Which technology is right for your business?
The right choice depends on your business model. A high-volume studio or recovery center typically operates more cost-effectively with a walk-in, electric chamber because multiple people can train per session and there’s no need to source nitrogen. A boutique provider or practice that positions very low temperatures as a unique selling point and offers only individual sessions may be well-served by an N2 cryosauna—provided that ventilation, oxygen monitoring, and nitrogen logistics are properly addressed. Those looking to offer a broad range of services can combine cold therapy with other modalities; our guide to hyperbaric oxygen therapy provides an overview of the premium recovery spectrum.
Also keep scalability in mind: As your operations grow, a walk-in chamber makes it easier to achieve high throughput, whereas a second N2 unit adds to your logistical challenges. Therefore, be sure to calculate not only the initial purchase cost but also the total cost over several years—including consumption, maintenance, and personnel.
Application and Procedure in Everyday Studio Practice
A typical session lasts only two to three minutes. Users enter the chamber with dry skin and minimal, dry clothing; in N2 cryosaunas, gloves, socks, and a headband protect the extremities. A trained supervisor is present during every session, monitoring the time and ensuring the user’s well-being. Between sessions, brief cleaning and drying steps ensure hygiene and a smooth workflow. Important for any reputable business: There are situations in which a session is not recommended—such as in cases of certain pre-existing cardiovascular conditions, during pregnancy, or in cases of cold intolerance. Your customers should consult a doctor in advance to address such issues; your team documents their suitability using a brief intake form.
Space, Safety, and Operations
Plan the structural requirements early on: floor space and floor load capacity, electrical connections for electric chambers, ventilation and oxygen sensors for N₂ systems, as well as staff training. For nitrogen-based systems, logistics for replenishment and safe storage must also be considered. ProReset delivers the chambers throughout Europe, handles installation, and trains your team on-site—reducing the risk of operator error and downtime. Proactive planning of maintenance intervals, replacement parts, and staff training keeps your chamber operating reliably and safely for years to come and protects your revenue from unplanned downtime.
ProReset CryoPro: An Overview of the Models
ProReset offers both technologies—custom-made, CE-compliant, and available upon request (no list price):
- CryoPro e-Chill – a fully electric, nitrogen-free whole-body chamber for multiple people; ideal for high throughput in studios and clinics.
- CryoPro Sauna – commercial single-person cryosauna (N2, head-out) designed for high utilization in standalone operation.
- CryoPro Mini – a compact N2 cryosauna for small spaces and starter setups.
- CryoPro Skin – Handheld device for targeted, localized cold therapy, used in conjunction with the chamber.
You can find the complete selection in the Cryotherapy and Regeneration collections.
Common Mistakes When Buying
- Focus only on the minimum temperature. Very low values sound good, but they say little about the actual benefits and nothing about cost-effectiveness.
- Underestimating nitrogen logistics. Resupply, storage, and oxygen monitoring incur ongoing costs and require effort.
- Planning the space and ventilation too late. Floor load, electrical connections, and ventilation are key factors in determining whether a permit can be granted.
- Don't just calculate based on throughput. If you want to serve a lot of customers, you need a chamber with the appropriate capacity.
- Ignore service and warranty. Without maintenance, replacement parts, and training, you risk downtime that results in lost revenue.
Purchasing Advice and Quote
As an authorized dealer, we provide you with criteria-based advice—from technology selection and room planning to commissioning. Delivery, installation, and training are included with ProReset chambers. Since each system is configured on a project-by-project basis, pricing is provided as a customized quote. Request your quote via the Contact page or the wholesale inquiry form.
Frequently Asked Questions
Which is better: an N2 cold chamber or an electric cold chamber?
It depends on the application. For high throughput and ease of operation, electric chambers are usually the better choice because they are nitrogen-free and walk-in. N2 cryosaunas offer very low temperatures in single-user mode, but require nitrogen logistics and oxygen monitoring.
How cold does a cryochamber get?
Electric chambers typically operate at temperatures between approximately -85 and -110 °C. N2 systems can reach even lower temperatures for short periods. However, what is crucial for the application is not just the lowest temperature, but the controlled, uniform cooling throughout the short duration of the session.
Is cryotherapy with nitrogen dangerous?
When installed and operated properly, it is manageable; however, liquid nitrogen can displace the oxygen in the air. For this reason, head-out operation, adequate ventilation, and oxygen sensors are mandatory. Electric chambers eliminate this gas hazard, as the air remains breathable.
How much space does a cold chamber require?
Compact N2 cryosaunas fit into a space of just a few square meters, while walk-in electric chambers require more floor space and a suitable power connection. We’ll work with you to check floor load capacity, ventilation, and access before delivery.
How much does a cryotherapy chamber cost?
Since each system is configured on a project-by-project basis—including technology, size, features, and installation—we provide pricing as a customized quote. Request a no-obligation quote using our contact form.
How often should you use the cold chamber?
That depends on your goal and training intensity. Many users incorporate full-body cold therapy after intense workouts or several times a week as part of their routine. There is no one-size-fits-all guideline; if in doubt, go by your individual tolerance—and, if you have any health concerns, consult a doctor.
Conclusion
The choice between an N2 and an electric cold chamber is primarily an operational decision: N2 for very low temperatures in standalone operation, and electric for reliable, predictable high throughput without consumables. Make your decision based on throughput, space, operating costs, and safety—not solely on the minimum temperature. Are you planning a recovery solution? Talk to our team for criteria-based advice and a customized quote.