Infrared vs Traditional Sauna: Which Is Right for Your Goals?
Heat Therapy · 12 min read · Marterra editiorial Team
At a Glance
- Traditional (Finnish) sauna has the strongest cardiovascular and longevity evidence — the landmark Laukkanen cohort followed 2,327 Finnish men for 20 years
- A 2025 head-to-head study in the American Journal of Physiology found traditional sauna produced greater thermoregulatory and cardiovascular responses than far infrared in the same session duration
- Infrared sauna operates at lower temperatures (110–150°F vs 170–200°F), making it more accessible for daily use and more tolerable for heat-sensitive individuals
- Infrared has a credible and growing evidence base for recovery, chronic pain, mental health, and arterial function — different applications, not inferior ones
- Steam sauna adds humidity, which has distinct benefits for respiratory health and skin that neither dry traditional nor infrared fully replicate
- The honest answer for most users: your goal, your tolerance, and your home setup determine which is better — not a universal ranking
The infrared vs traditional sauna debate — sometimes framed as infrared vs Finnish sauna, or far infrared sauna vs steam sauna — has generated more confident opinions than careful thinking. Infrared advocates cite lower temperatures, deeper tissue penetration, and detox benefits. Traditional sauna advocates cite decades of Finnish cohort data and call infrared a pale imitation. Both positions overstate their case.
The honest picture is more interesting — and more useful for someone actually trying to decide what to put in their home. Each modality has a distinct mechanism, a distinct evidence base, and a distinct set of practical advantages. Understanding where they genuinely differ, and where the marketing has run ahead of the research, is the starting point for a good decision.
How Each Type Works: The Core Difference
Infrared sauna
Heats the body directly using infrared light (near, mid, or far infrared wavelengths). The air temperature remains relatively low (110–150°F / 43–65°C). Your body absorbs the radiant energy and heats from within. Warm-up time is typically 10–15 minutes. Sweat is produced at lower ambient temperatures than in a traditional sauna.
Traditional (Finnish) sauna
Heats the air to high temperatures (170–200°F / 77–93°C) using a wood stove or electric heater. Your body heats through convection — absorbing heat from the surrounding hot air. Adding water to the stones creates steam (löyly), increasing humidity and perceived intensity. Warm-up time is typically 30–45 minutes.
Steam sauna (wet sauna) is a variant of traditional sauna with significantly higher humidity — typically 100% relative humidity at lower temperatures than a Finnish dry sauna. It deserves brief mention because its benefits for respiratory health and skin hydration are distinct from both infrared and dry traditional, and it is often conflated with one or the other.
The Evidence Base: What Research Supports Each
Traditional sauna — the longer track record
The cardiovascular and longevity evidence for sauna is overwhelmingly based on traditional Finnish sauna. The landmark study is Laukkanen et al. (2015, JAMA Internal Medicine) — a 20-year prospective cohort of 2,327 Finnish men showing dose-dependent reductions in cardiovascular mortality with sauna frequency. Men using sauna 4–7 times per week had approximately 40–50% lower relative risk of fatal cardiovascular disease compared to once-weekly users — an observational finding, not a causal one, with high-frequency users likely differing in other lifestyle factors.
Subsequent analyses from the same cohort linked frequent traditional sauna use to reduced risk of dementia, stroke, hypertension, and respiratory disease. A 2025 review in Frontiers in Cardiovascular Medicine confirmed sauna's role as a novel management approach for cardiovascular health, citing consistent mechanistic and population evidence.
These findings are associations — observational data from a specific population (middle-aged Finnish men) using a specific modality (traditional Finnish sauna at high temperatures and humidity). They do not prove causation and do not automatically transfer to other populations or sauna types. But the consistency and duration of the data is genuinely difficult to dismiss.
Infrared sauna — a distinct and growing evidence base
Infrared sauna should not be evaluated by how well it replicates traditional sauna data — it has its own evidence base, focused on different applications.
- ·Arterial function. Multiple studies have found infrared sauna improves arterial stiffness and endothelial function. Multiple studies have observed improvements in endothelial function and arterial stiffness with regular infrared sauna use, though reported effect sizes vary across studies and measurement methods.
- ·Chronic pain. A systematic review found infrared sauna therapy showed promise for chronic pain management, with particularly strong signals for fibromyalgia and chronic lower back pain — conditions where high-temperature traditional sauna may be less accessible.
- ·Mental health. A 2025 UCSF study (Mason et al.) combining whole-body infrared heat exposure with cognitive behavioral therapy found that 86.2% of participants no longer met criteria for major depressive disorder at final assessment — building on a 2024 pilot from the same team. Both are preliminary feasibility studies; larger controlled trials are underway.
- ·Heart failure. Clinical research on repeated infrared sauna use in patients with chronic heart failure has shown improvements in cardiac function, exercise tolerance, and quality of life — applications where traditional high-heat sauna would be contraindicated.
The infrared evidence base is smaller and more recent than the traditional sauna literature. That is a factual limitation worth noting — but it does not make infrared evidence weak. It makes it early.
Head-to-Head: The 2025 Direct Comparison Study
The most rigorous direct comparison published to date comes from a 2025 randomized crossover trial in the American Journal of Physiology (Sastriques-Dunlop et al.), which compared thermoregulatory, cardiovascular, and immune responses to hot water immersion, traditional sauna, and far infrared sauna in 20 healthy adults.
Key findings:
- ·Hot water immersion produced the greatest thermoregulatory and cardiovascular responses of the three modalities
- ·Traditional sauna produced greater acute cardiovascular and thermoregulatory responses than far infrared sauna in matched session durations
- ·Far infrared sauna still produced meaningful core temperature elevation — just more gradually and at lower peak values
- ·The immune response patterns differed between modalities, though the clinical significance of these differences is not yet established
Note: this study measured acute physiological responses in 20 participants — not long-term health outcomes. Results are directionally informative, not definitive.
Which Is Better by Goal
| Goal | Better modality | Why |
|---|---|---|
| Cardiovascular health and longevity | Traditional | Stronger and longer population evidence base; higher acute cardiovascular stimulus |
| Daily recovery and muscle soreness | Infrared | Lower temperature makes daily use more practical; growing recovery evidence base |
| Chronic pain management | Infrared | More studied specifically for fibromyalgia and chronic pain; accessible for heat-sensitive patients |
| Mental health support | Both — emerging evidence | Whole-body hyperthermia benefits apply to both; UCSF work used infrared specifically |
| Respiratory health | Steam / traditional with löyly | Humidity is the key variable; dry infrared does not replicate this benefit |
| Heat-sensitive users or cardiac conditions | Infrared (with medical guidance) | Lower temperatures and gradual heating make it more accessible; some heart failure studies used infrared specifically |
| Skin health and hydration | Steam / traditional with humidity | Humidity drives the skin benefit; infrared in dry heat does not replicate it |
| Installation ease and running costs | Infrared | Lower power requirements, faster warm-up, no ventilation for steam; significantly lower running costs |
Practical Differences: Installation, Cost, Daily Use
- —Warm-up time. Infrared: 10–15 minutes. Traditional: 30–45 minutes. For daily use, this difference is significant — infrared supports spontaneous sessions; traditional requires planning.
- —Temperature tolerance. Infrared at 120–150°F is accessible to most people. Traditional at 170–200°F is not suitable for everyone, particularly heat-sensitive individuals, those with certain cardiovascular conditions, or those new to sauna use.
- —Electrical requirements. Most home infrared saunas run on standard 120V or modest 240V circuits. Traditional electric saunas require higher-amperage 240V dedicated circuits. Wood-burning traditional saunas require ventilation, chimney installation, and often outdoor placement.
- —Running costs. Infrared saunas use less electricity due to lower target temperatures and faster warm-up. A 30-minute infrared session costs significantly less per session than an equivalent traditional session.
- —Session experience. Traditional sauna — particularly with löyly (steam) — produces a more intense, immersive heat experience that many users find deeply satisfying in a way infrared does not replicate. This is subjective but relevant for long-term adherence.
The Case for a Combined Unit
Most buyers underestimate how their preferences and goals evolve over time. Someone who starts with a recovery focus often develops a cardiovascular and longevity interest within a year. Someone who wants daily use may eventually want the deeper intensity of a traditional session. The framing of infrared versus traditional as a binary choice reflects how sauna is sold — not how it is best used. A home wellness room that allows you to access infrared heat for daily recovery sessions and traditional heat with steam for deeper cardiovascular and respiratory sessions gives you the evidence base of both without committing to one application profile.
The Finnmark FD-5 Trinity XL combines infrared, steam, and red light therapy in a single unit — designed precisely for users who want access to multiple modalities without multiple installations. For a home wellness room where the sauna is the anchor modality, this removes the forced choice entirely.
For users choosing a single modality, both infrared and traditional can deliver meaningful long-term benefits when used consistently — the modality matters less than the frequency and duration of use. This matters because the research increasingly suggests that cumulative and consistent sauna use drives long-term benefits. A unit you use daily at infrared temperatures will likely deliver more value than a traditional-only unit you use twice a week because the heat experience is too intense for more frequent sessions.
Explore Sauna Options
From infrared-only to combined infrared, steam, and red light — browse the Marterra sauna collection or book a free consultation to find the right configuration for your space and goals.
FAQ: Infrared vs Traditional Sauna
Is infrared sauna as good as traditional sauna?
For cardiovascular and longevity outcomes specifically, traditional sauna has the stronger evidence base because it has been studied in large populations for decades. For daily recovery, chronic pain, and accessibility, infrared has meaningful advantages. A 2025 direct comparison study found traditional sauna produced greater acute cardiovascular stimulus than far infrared in matched session durations — but infrared still produced clinically meaningful core temperature elevation. "As good as" depends entirely on what you are trying to achieve.
Does infrared sauna penetrate deeper than traditional?
Infrared wavelengths can penetrate tissue to some degree — near-infrared more than far-infrared, and both more than convective air heat from a traditional sauna, though the precise depth and clinical significance of this difference is not clearly established in vivo. However, the physiological significance of this penetration difference for most wellness applications has not been clearly established in clinical research. The "deeper penetration" claim is often overstated in infrared sauna marketing.
Which sauna is better for weight loss?
Neither modality has strong evidence for meaningful long-term weight loss as a standalone intervention. Both produce significant fluid loss through sweat — which reflects on a scale but returns with rehydration. For a full breakdown of how sauna fits a recovery routine, see our post-workout recovery guide. Any caloric expenditure during a sauna session is modest. Sauna supports recovery and may indirectly support body composition by improving training frequency and sleep quality, but it should not be used as a primary weight management tool.
Which sauna is better for detox?
Sweat contains trace amounts of some heavy metals and environmental compounds — this is a documented but minor excretion pathway. The liver and kidneys handle the vast majority of detoxification; sauna's contribution is modest. The "detox" marketing in the sauna industry significantly overstates the clinical significance of this effect. The modality difference matters less than the consistency of use.
Can I use infrared and traditional sauna on the same day?
Yes — and many users with combined units do exactly this, using infrared for a lighter morning session and traditional heat with steam for a more intense evening session. There is no evidence of negative interaction between the two modalities when used on the same day with appropriate hydration and rest between sessions.
Is infrared sauna safe for daily use?
Daily infrared sauna use is generally well-tolerated by healthy individuals without contraindications. The lower temperatures of infrared make daily use more accessible than high-temperature traditional sauna for most people. As with all sauna types, adequate hydration before and after, and appropriate session duration, are important. Individuals with cardiovascular conditions, pregnancy, or heat sensitivity should consult a healthcare provider before regular use.
Recommended
Sources
- Laukkanen T, et al. "Association between sauna bathing and fatal cardiovascular and all-cause mortality events." JAMA Internal Medicine, 2015. pubmed.ncbi.nlm.nih.gov/25705824 — 20-year cohort, 2,327 men; dose-dependent cardiovascular mortality reduction with traditional sauna frequency.
- Sastriques-Dunlop S, et al. "Sauna use as a novel management approach for cardiovascular health and peripheral arterial disease." Frontiers in Cardiovascular Medicine, 2025. frontiersin.org — 2025 review confirming sauna's cardiovascular management role.
- Laukkanen JA, et al. "Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women." BMC Medicine, 2018. pubmed.ncbi.nlm.nih.gov/30367599 — Broader population analysis including women.
- "Comparison of thermoregulatory, cardiovascular, and immune responses to different passive heat therapy modalities." American Journal of Physiology, 2025. journals.physiology.org — Direct head-to-head: hot water immersion vs traditional vs far infrared sauna; 20 participants.
This article is for informational purposes only and does not constitute medical advice. Sauna use carries real risks for individuals with cardiovascular conditions, pregnancy, heat sensitivity, or certain medications. Consult a qualified healthcare provider before beginning regular sauna use if you have any underlying health conditions.