Are Infrared Saunas Real Saunas? The Complete Guide

Are infrared saunas real saunas? Yes — with a meaningful caveat. By the physiological definition (a heated enclosure that produces sustained sweating, elevated heart rate, and core-temperature rise), infrared saunas qualify fully. By the strict Finnish cultural definition, they do not, because they lack a stone stove and cannot produce löyly — the steam that is central to the traditional Finnish ritual. Infrared saunas heat your body directly via radiant energy at air temperatures of 50–60°C (122–140°F), while a traditional Finnish sauna heats the surrounding air to 80–90°C (176–194°F) via convection. Different method, substantially overlapping result. Both are saunas by function; only one is a sauna by Finnish cultural definition.

Are Infrared Saunas Real Saunas? The Definition Debate

The word “sauna” is Finnish, and its original meaning is precise: a small, wood-panelled heated room with a stone-topped stove, from which steam is produced by ladling water onto the stones. That steam — löyly — is not an optional accessory. For Finns, löyly is the emotional and sensory heart of the ritual. Finland has approximately two million saunas for a population of 5.5 million people; the practice is woven into domestic life at a level that has no equivalent in most other cultures.

When Finnish institutions define the sauna, they almost universally include löyly as a requirement. The Finnish Sauna Society (Suomen Saunaseura) — the country’s foremost authority on sauna culture and practice — has publicly noted that infrared cabins, however therapeutic, occupy a different category. This is not a judgment about the health value of infrared; it is a position rooted in linguistic origin and cultural authority.

The International Sauna Association (ISA) takes a broader view, recognizing any heated enclosure designed to induce therapeutic sweating as a sauna format. Most clinical researchers, wellness professionals, and home buyers in North America use the term the same way — loosely, to describe any heat cabin designed for regular use. By that broader definition, infrared saunas are saunas in every practical sense.

How infrared saunas heat the body (and why lower air temp still works)

Understanding how infrared saunas heat the body explains why the lower air temperature is not a flaw — it is the mechanism. The key is radiant energy vs. convective energy. A traditional sauna heats the air, and your body absorbs that thermal energy from the surrounding hot air and from the warm surfaces around you. An infrared sauna skips the air almost entirely.

Infrared radiation and the body

Infrared emitters in a sauna cabin produce electromagnetic radiation in the far-, mid-, and near-infrared bands (roughly 0.7 to 1,000 micrometres wavelength). This radiation passes through the cooler cabin air without warming it substantially and is absorbed by the surface layers of your skin and underlying tissue. The result: your skin and superficial tissue warm up, your thermoregulatory system detects rising skin and core temperature, and sweating begins — even though the air around you is only at 50–60°C rather than the 80–90°C of a traditional sauna.

The three infrared bands each behave slightly differently. Far-infrared (FIR, 5.6–1,000 μm) is the most common in home sauna emitters and penetrates the skin most gently; this is the Waon-therapy wavelength used in Japanese cardiology research. Mid-infrared (MIR, 1.5–5.6 μm) penetrates slightly deeper into tissue. Near-infrared (NIR, 0.7–1.5 μm) is the shortest, most energetic band and is sometimes combined with red-light panels for photobiomodulation benefits alongside heat. Full-spectrum infrared cabins deliver all three bands simultaneously.

Why the body responds the same way

Core-temperature elevation, sweating, and the cardiovascular response to heat are driven by the body’s thermoreceptors and autonomic nervous system — not by the air temperature itself. Whether your skin heats up because the surrounding air is 90°C or because an infrared panel is radiating energy into it at 50°C ambient, the downstream physiology is substantially the same: sweat glands activate, blood vessels dilate, heart rate increases, cardiac output rises, and the body works to shed heat. That is why researchers find comparable physiological markers (sweating, heart-rate elevation, blood-pressure changes) in both formats, even though the sessions look and feel quite different.

Infrared vs. traditional sauna: a complete comparison

No single format wins across every dimension — traditional and infrared each lead on roughly half the factors that matter to home buyers. The table below maps the key differences honestly, without brand spin. Read across it to find which format matches your priorities, then use those priorities to guide your choice.

Stat: In the Laukkanen et al. 2015 JAMA Internal Medicine study, men who used a traditional Finnish sauna 4–7 times per week had a 40% lower risk of fatal cardiovascular events compared with those who used it once per week. This data was collected exclusively in traditional Finnish saunas and remains the largest long-term sauna dataset to date.

Do infrared saunas make you sweat? Does that sweat “count”?

Yes, infrared saunas make you sweat — and that sweat is physiologically indistinguishable from sweat produced in a traditional sauna. The debate about whether infrared sweat “counts” often conflates two separate questions: does infrared produce sweating (yes, demonstrably), and is infrared sweat somehow different in composition or health value (no robust clinical evidence supports this claim).

How the sweat response works in each format

Sweating is triggered when the body’s core temperature rises and the hypothalamus signals eccrine sweat glands to activate. In a traditional sauna, air at 80–90°C transfers heat to the skin rapidly; sweat onset is fast and vigorous, and sessions are intentionally short (10–20 minutes) because the heat stress is intense. In an infrared sauna, radiant energy warms the skin and underlying tissue gradually with cooler surrounding air, so sweat onset is slower but sessions run longer. Total sweat output over a 35–45 minute infrared session is comparable to — and in some studies greater than — a 15-minute traditional session.

What about the “deeper sweat” claim?

Infrared marketing frequently claims that infrared saunas produce a “deeper” sweat with higher toxin content. This claim is not robustly supported by peer-reviewed clinical literature. Sweat is predominantly water and electrolytes; the concentration of heavy metals and environmental toxins in sweat is small relative to what kidneys and liver process. The physiological value of sweating in a sauna is primarily thermoregulatory — it is the mechanism by which the body manages heat stress, not a significant detoxification pathway. The cardiovascular, blood-pressure, and recovery benefits associated with sauna use are driven by heat stress response, not sweat composition. In both formats, drink fluids before and after every session.

The research picture: what the science actually says

The evidence base for sauna health benefits is real, but it is not evenly distributed between the two formats — and that asymmetry matters when you are evaluating claims. Here is an honest summary of what the science shows and where the gaps are.

Traditional Finnish sauna: the established evidence base

The strongest long-term data on sauna and health comes from Finnish-cohort epidemiology, where traditional sauna use has been studied across thousands of participants and decades of follow-up. The most cited publication is Laukkanen et al. (2015) in JAMA Internal Medicine, which followed 2,315 middle-aged Finnish men for up to 20 years and found that sauna frequency was inversely associated with fatal cardiovascular events and all-cause mortality. Men bathing 4–7 times per week had roughly half the risk of sudden cardiac death compared with those bathing once per week.

Follow-on publications from the same Kuopio Ischæmic Heart Disease cohort and related Finnish data have examined sauna bathing and dementia risk, blood pressure, respiratory mortality, and cardiovascular biomarkers. A comprehensive review by Laukkanen, Laukkanen, and Kunutsor in Mayo Clinic Proceedings (2018) synthesized both Finnish cohort data and infrared trial literature, concluding that sauna bathing appears to have multiple beneficial cardiovascular effects. This review is the best single academic source for understanding where the evidence stands across both formats.

Infrared sauna: the emerging evidence

Infrared sauna research is real, peer-reviewed, and consistently points in the same direction as traditional sauna data — but it is smaller, shorter, and narrower in scope. The most clinically developed infrared protocol is Waon therapy, a Japanese far-infrared sauna protocol developed at Kagoshima University by Chuwa Tei and colleagues. Waon therapy studies — published in journals including Circulation Journal — have examined patients with chronic heart failure, peripheral arterial disease, and related cardiovascular conditions, generally finding improvements in exercise tolerance, endothelial function, and quality of life.

Other infrared-specific studies have examined chronic fatigue, musculoskeletal pain, and cardiovascular biomarkers in healthy adults. The findings are largely consistent with traditional sauna data in direction of effect: heat stress appears beneficial for the same broad mechanisms (cardiac output, peripheral vascular resistance, autonomic tone). The limitation is volume and follow-up: most infrared trials are short-term, involve small samples, and have not yet produced the decades-long prospective cohort data that anchors the Finnish literature.

Stat: Laukkanen et al. (2018 Mayo Clinic Proceedings) reviewed evidence from both Finnish sauna cohort studies and infrared Waon-therapy clinical trials and found that sauna bathing “has several health benefits, which include reduction in the risk of vascular diseases such as high blood pressure, cardiovascular disease, stroke, and neurocognitive diseases.” The review covers both formats together, which is the most intellectually honest framing of where the science stands.

The purist argument — and the practical counter

The purist position — that only a stove-and-stones, löyly-capable room is a real sauna — is not wrong. It is a culturally grounded, historically accurate position that deserves to be taken on its own terms before being countered.

Here is the purist case stated fairly: the word sauna is one of the few Finnish words that entered international vocabulary intact. For 2,000+ years of Finnish history, sauna meant a specific thing: a small heated room, stones on a stove, a wooden ladle and bucket, and the rising steam of löyly. That steam is not a feature; it is the experience. Löyly changes the perceived heat against the skin, the smell of the cedar, the rhythm of the session. An infrared cabin — however therapeutic — does not replicate that. Calling it a “sauna” is, in this view, a category error that happens to be commercially convenient for infrared manufacturers.

The practical counter is equally fair: language evolves, and function matters. In clinical literature, in wellness culture, and in everyday North American usage, “sauna” now describes any heated enclosure used for regular heat-stress bathing. Infrared cabins produce the physiological outcomes that people seek from sauna use. Most buyers in Canada and the United States did not grow up with a kiuas in the family home and have no cultural stake in the löyly definition. For them, the functional definition is the useful one.

The intellectually honest position is this: both definitions are coherent, both arguments are valid, and the right choice between formats depends on what you value — cultural authenticity and the research base, or installation flexibility and session tolerability. Claiming either format is “not a real sauna” in an attempt to sell the other is marketing, not information.

What each format is best for

Choose based on what you actually want from a sauna — both formats have evidence-supported use cases, and neither is universally superior. The table below is not a ranking; it is a matching guide.

Traditional Finnish sauna is the better fit when…

• Löyly and the Finnish ritual matter to you. If the sensory experience — the hiss of water on stones, the pulse of steam, the high ambient heat — is part of why you want a sauna, there is no infrared substitute. The Calore Black Cedar Sauna Chamber is built for exactly this experience, with Canadian-sourced cedar and a stone heater designed for authentic löyly sessions.
• You want the deepest research base. The Laukkanen cohort and Finnish epidemiological data represent 20+ years of follow-up. If you want your practice backed by the most robust long-term evidence, traditional is where that data lives.
• You share the sauna with multiple adults who all tolerate high heat. Traditional’s uniform hot-air bath works well for groups because heat distribution does not depend on proximity to an emitter panel.
• You want short, intense ritual sessions. The Finnish approach of 10–20 minutes at peak heat, followed by a cold plunge and rest, is a complete cycle that many practitioners prefer to longer, lower-heat infrared sessions.

Infrared sauna is the better fit when…

• You want simpler indoor installation. Most premium indoor infrared saunas run on standard 120V/20A household circuits. No dedicated 240V run, no special drainage, no ventilation beyond what a normal room provides. The Calore indoor infrared sauna is designed for finished basements, spare rooms, or garage spaces without major electrical work.
• You are new to sauna, or heat-sensitive. Lower air temperature gives new users and those with lower heat tolerance a more gradual, sustainable entry point. Session length at 50–60°C is more forgiving than at 85°C.
• You want longer sessions with modern features. Infrared sessions typically run 30–45+ minutes, which suits people who want to read, listen to audio, or use guided wellness protocols. App connectivity, ambient lighting, and red-light therapy integration are far more common in premium infrared builds.
• You want lower energy consumption. Heating your body with radiant energy at 55°C draws significantly less electricity than maintaining 85°C air in a room-sized enclosure. That matters for daily use economics over months and years.

5 questions to find the right sauna for your home

Most buyers get stuck because they approach the question as “which is better?” rather than “which fits my situation?” Work through these five questions in order and the answer usually becomes clear.

1. What is your electrical situation? If your installation space has a standard 120V/20A outlet available, most infrared options are plug-and-play. If you are building or renovating with a 240V circuit already in the plan, traditional opens up fully. Never let wiring alone decide the question — but understand the constraint before you shop.
2. What temperature can everyone in the household tolerate? A sauna that sits unused because it is too hot for one household member is the wrong sauna regardless of its merits. If heat tolerance varies significantly among users, infrared’s lower air temperature is a real practical advantage.
3. How long will you realistically session? A 12-minute Finnish sauna followed by a cold rinse is a specific daily ritual. A 35-minute infrared session while listening to a podcast is a different one. Both are sustainable; neither is inherently superior. Pick the session shape you will actually maintain.
4. Is löyly part of what you want? This is a yes/no question and it largely decides the format. If you want steam — the ritual of the ladle and bucket, the billowing heat, the sensory punch of löyly — you want a traditional stove-and-stones sauna. No infrared product replicates that experience.
5. What modern features matter to you? If app-guided sessions, integrated red-light therapy, ambient lighting, and remote preheat are important, premium infrared leads the category by a wide margin. If you want the simplest possible thermal appliance with no screens or connectivity, traditional has a beautifully minimal option set. Explore both across the Calore sauna collection to compare side-by-side.

Frequently Asked Questions