How the Two Heating Systems Work
Traditional saunas use convection — heating rocks or elements that warm the surrounding air, which then heats your body. Infrared saunas use radiant heat from carbon or ceramic panels that penetrate the skin directly without significantly raising air temperature. This fundamental difference drives every other distinction between the two.
A traditional Finnish sauna works by heating a stack of rocks with an electric heater or a wood-fired stove. As the rocks reach high temperatures, they radiate heat into the room, warming the air to 160–200°F. Your body then absorbs heat primarily from that hot air through convection — the same mechanism by which a heated room warms anything placed inside it. Many traditional saunas also allow users to pour water over the hot rocks to create steam, known in Finnish as löyly. This burst of humidity intensifies the heat sensation and is considered an integral part of the traditional experience by many practitioners.
An infrared sauna takes a different approach entirely. Carbon or ceramic panels mounted on the walls emit far-infrared wavelengths — a form of radiant energy that is absorbed directly by skin and underlying tissue, similar to how sunlight warms your skin even on a cool day. Because the energy transfers directly to the body rather than first heating the air, the cabin's interior air temperature stays much lower — typically 120–150°F — while the body itself still experiences a meaningful rise in core temperature and a corresponding sweat response.
Neither approach is inherently "better" at generating heat stress — they simply achieve it through different physical mechanisms, which in turn shapes the experience, the equipment required, and the running costs discussed later on this page.
Temperature, Comfort, and Session Experience
Traditional saunas operate at 160–200°F with optional humidity bursts, creating an intense experience most people tolerate for 10–20 minutes. Infrared saunas run at 120–150°F with dry heat, allowing longer sessions of 30–45 minutes at a level many users find more comfortable.
The temperature gap between the two formats is significant. A traditional sauna's 160–200°F air, especially with added steam, creates an intense respiratory and skin-level heat sensation that many first-time users need several sessions to acclimate to. Sessions are correspondingly shorter — often 10–20 minutes — with breaks for cooling between rounds. Infrared saunas, by contrast, keep ambient air in the 120–150°F range and never introduce humidity, so the heat builds gradually from within rather than surrounding the body immediately. This allows many users to comfortably stay inside for 30–45 minutes.
This does not mean infrared is universally "better" for comfort — some users specifically seek out the intensity of a traditional sauna, including the steam and the social ritual that often accompanies it. For these users, the higher heat and shorter sessions are a feature, not a drawback. The right experience depends on personal heat tolerance, available time, and whether the ritual aspects of a traditional sauna matter to you.
What the Research Says — Comparing the Evidence
Traditional Finnish saunas are supported by large-scale, long-term studies — including cohorts of thousands tracked over 20+ years — linking frequent use to reduced cardiovascular risk. Infrared sauna research is more recent, smaller in scale, and focused on specific outcomes like chronic pain and muscle recovery rather than long-term mortality.
A 2018 systematic review published in Mayo Clinic Proceedings examined 40 studies covering 3,855 participants, the large majority involving traditional Finnish sauna bathing. It found beneficial associations across cardiovascular health, blood pressure, pain, and general well-being — benefits that, in the largest cohort studies, were tracked across decades of regular use. Full review: PMC5941775.
By comparison, a 2009 review in Canadian Family Physician looked specifically at far-infrared sauna therapy, identifying nine relevant papers and concluding there was "limited to moderate evidence" for some cardiovascular benefits. Full review: PMC2718593. Separately, the Cleveland Clinic notes that the cardiovascular response to an infrared sauna session has been compared to that of walking at a moderate pace — a useful frame for understanding the intensity of the stimulus. Source: Cleveland Clinic.
The strongest long-term cardiovascular evidence comes from traditional sauna studies. Infrared research is earlier-stage but shows promising results for pain management, muscle recovery, and relaxation. The absence of large-scale infrared studies does not disprove benefits — it means they have not yet been confirmed at the same level of rigour. Both types of sauna raise heart rate and promote sweating; the open question is one of degree of physiological stress and depth of long-term data, not whether either approach "works."
Side-by-Side Comparison
When compared across the factors that matter most to home buyers — heat intensity, running cost, space requirements, installation complexity, and strength of health evidence — infrared and traditional saunas each have clear advantages depending on the buyer's priorities.
| Factor | Infrared Sauna | Traditional Sauna |
|---|---|---|
| Operating temperature | 120–150°F | 160–200°F |
| Heating method | Radiant (direct to body) | Convection (heats air) |
| Humidity | Dry heat only | Dry + optional steam (löyly) |
| Typical session length | 30–45 minutes | 10–20 minutes |
| Preheat time | 10–15 minutes | 30–60 minutes |
| Heater wattage | 1,500–3,000W | 4,000–8,000W |
| Cost per session (@ $0.17/kWh) | $0.19–$0.38 | $0.68–$1.36 |
| Electrical requirement | Standard 120V outlet (most models) | Often requires 240V dedicated circuit |
| Installation | Plug-and-play (most models) | May require electrical work + ventilation |
| Space required | From blanket (no floor space) to 4×4ft cabin | Minimum 4×4ft, typically 5×7ft+ |
| Purchase price range | $150 (blanket) – $7,000+ (premium cabin) | $2,000 – $12,000+ |
| Strength of health evidence | Emerging — smaller studies, promising for pain/recovery | Extensive — decades of large-scale cardiovascular research |
| Comfort for heat-sensitive users | High — lower temperature, well tolerated | Lower — intense heat may be uncomfortable initially |
| Social/multi-user use | Possible in cabin models | Traditional strength — cultural/social practice |
Installation and Space Requirements
Most infrared saunas plug into a standard 120V household outlet and require no special ventilation, making them suitable for apartments and rental properties. Traditional saunas typically need a 240V dedicated circuit, proper ventilation, and more floor space — often requiring professional installation.
On the infrared side, sauna blankets and portable domes or tents need essentially no dedicated floor space — they fold away in a closet between uses. Full-size infrared cabins need a footprint of roughly 4×4ft, but the large majority of models on the market still run on a standard household outlet, meaning installation is typically a matter of unboxing, assembling, and plugging in.
Traditional saunas are a bigger commitment. Beyond the minimum 4×4ft (often 5×7ft or larger) footprint, most heaters in the 4,000–8,000W range require a dedicated 240V circuit, which usually means hiring a licensed electrician. The use of steam also means the room needs adequate ventilation and moisture-resistant construction. For renters or anyone without the ability to modify a home's electrical system, this can be a deciding factor on its own. Both formats can also be installed outdoors as a standalone structure, which sidesteps some indoor space constraints but adds its own building considerations.
Running Costs Compared
Infrared saunas cost 60–75% less to run than traditional saunas due to lower wattage heaters and shorter preheat times. A typical infrared session costs $0.19–$0.38 in electricity, while a traditional session costs $0.68–$1.36 at average US electricity rates.
The cost difference comes down almost entirely to wattage and preheat time: traditional heaters draw two to four times the power of infrared panels, and need 30–60 minutes to bring a room up to temperature compared to 10–15 minutes for infrared. Over a typical usage pattern of a few sessions per week, this adds up to a meaningfully lower monthly electricity cost for infrared owners. For a detailed cost breakdown by sauna type with an interactive calculator, see How Much Does an Infrared Sauna Cost to Run?
Which Type Is Right for Your Situation?
The right choice depends on your priorities: infrared suits buyers who want lower cost, easier installation, gentler heat, and portable options. Traditional suits buyers who prioritise the strongest research-backed health outcomes, enjoy intense heat, and have the space and electrical capacity for a permanent installation.
Choose infrared if: you want plug-and-play installation, lower running costs, gentler heat, portable or space-saving options, or you are heat-sensitive.
Choose traditional if: you prioritise the deepest evidence base for cardiovascular health, enjoy intense heat and the steam ritual, have space for a permanent cabin, and can accommodate 240V wiring.
Consider both if: budget allows — they serve complementary purposes. Some users own an infrared blanket for daily convenience alongside a traditional sauna for deeper weekend sessions.
Frequently Asked Questions
Is infrared sauna as good as traditional sauna?
Both types raise core body temperature and heart rate, but through different mechanisms. Traditional saunas have substantially more long-term clinical evidence, particularly for cardiovascular outcomes. Infrared saunas show promise for pain relief and recovery but lack equivalent large-scale studies. The best choice depends on your goals and preferences.
What is the difference between dry heat, wet heat, and infrared?
Traditional saunas use dry convective heat with optional steam bursts from water poured on hot rocks. Steam rooms use 100% humidity at lower temperatures. Infrared saunas use radiant heat that warms the body directly without significantly raising air temperature. High humidity impairs the body's ability to cool through sweat evaporation, creating a different physiological stress from dry or radiant heat.
Can you use a traditional sauna and infrared sauna together?
Yes — some users alternate between the two or own both. They produce different types of heat stress and can complement each other in a broader wellness routine.
Is it safe to use a sauna while taking creatine?
Creatine draws water into muscle cells, which may increase dehydration risk during sauna use. If you supplement with creatine, prioritise hydration before, during, and after sauna sessions. Consult your physician before combining sauna use with any supplement that affects fluid balance.
Do saunas help with stress?
Both sauna types promote relaxation and may help reduce stress through heat exposure, which is associated with endorphin release. This benefit appears common to both infrared and traditional saunas when used consistently as part of a regular routine.
Looking for an Infrared Sauna?
If an infrared sauna fits your situation, our guide to the best at-home infrared saunas and heat therapy products reviews five top-rated options across blankets, portable tents, and full-size saunas — with verified specs, safety analysis, and profile-based recommendations.
View Best Sauna Picks → ⚠ Not medical advice. Affiliate link — we earn a commission at no cost to you.For a full guide to sauna safety and contraindications for both types, see Infrared Sauna Safety: Risks, Contraindications, and How to Use One Safely. For guidance on infrared sauna temperature, session length, and building a routine, see How to Use an Infrared Sauna. For a comparison of infrared sauna formats — blanket, tent, and cabin — see Sauna Blanket vs Tent vs Cabin: Which Type Is Right for You?