There’s no single “best” sauna for everyone. The right choice depends on your heat tolerance, health goals, budget, and available space. Traditional Finnish saunas, infrared saunas, and steam rooms each heat your body through different mechanisms, operate at different temperatures, and offer overlapping but distinct experiences. Here’s what actually matters when choosing between them.
How Each Type Heats Your Body
Traditional saunas use an electric or wood-burning heater filled with rocks. You pour water over the hot rocks to create steam, which heats the air, and the hot air heats your body. This is convection heating, the same principle as a conventional oven. The room itself gets extremely hot, typically 150 to 190°F, with low humidity around 10 to 20%. You control the humidity by how much water you toss on the rocks.
Infrared saunas skip the hot air entirely. Panels emit infrared light that warms your body directly, similar to how sunlight warms your skin on a cool day. Because the air doesn’t need to be superheated, infrared cabins run at a much lower 120 to 150°F. The experience feels gentler, but your core temperature still rises and you still sweat heavily.
Steam rooms (sometimes called Turkish baths or wet saunas) pump the humidity to nearly 100%, which is why they feel intensely hot even though the actual air temperature is only 110 to 120°F. The thick, moist heat opens airways and hydrates skin, but can feel suffocating if you’re not used to it.
Which Type Has the Strongest Health Evidence
Most of the landmark research on sauna health benefits comes from traditional Finnish saunas, largely because Finland has been studying them for decades. A major study following over 2,000 middle-aged men found that those who used a traditional sauna four to seven times per week had a 45% lower risk of fatal cardiovascular disease compared to those who went once a week. The same frequency was linked to a 40% reduction in death from any cause and a 66% lower risk of developing dementia.
These numbers are striking, but they come from observational research on one population using one type of sauna. Infrared saunas have shown benefits in smaller studies, particularly for people with chronic pain, chronic fatigue, and heart failure. A systematic review of the clinical evidence concluded there isn’t yet enough data to recommend one sauna type over another for specific health conditions. The physiological mechanism is similar across all types: your core temperature rises, your heart rate increases (mimicking light to moderate exercise), blood vessels dilate, and you sweat. Any sauna that reliably raises your core temperature will trigger these responses.
Muscle Recovery and Post-Workout Use
Sauna use after exercise is popular in gyms and athletic facilities, but the evidence is more nuanced than marketing suggests. Infrared sauna sessions after resistance training have been shown to reduce perceived muscle soreness, which matters if you’re trying to train again the next day. However, the biological markers of actual muscle damage, like creatine kinase and myoglobin levels, don’t change with sauna use compared to passive rest. In other words, you may feel better, but the underlying tissue repair process isn’t accelerated.
Heat exposure does trigger a hormonal response. Fifteen minutes in a traditional Finnish sauna at around 160°F increased growth hormone levels by roughly 150% in younger men. Growth hormone supports tissue repair and recovery, though a single post-workout spike is modest compared to the levels released during sleep.
Sweating and Detoxification
Both sauna types make you sweat, but the character of that sweat differs by experience. Traditional saunas produce rapid surface sweating driven by the extreme ambient heat. Infrared saunas tend to produce a slower, deeper-feeling sweat at lower temperatures because the radiant heat penetrates into the skin before the air around you feels overwhelmingly hot.
Sweat does contain trace amounts of heavy metals. Concentrations of nickel, lead, and chromium in sweat have been measured at 10 to 30 times higher than in blood or urine. This suggests sweating is a real, if minor, excretion pathway for certain toxins. That said, your kidneys and liver handle the vast majority of detoxification. Sauna sweating is a supplement to those systems, not a replacement.
Comfort and Heat Tolerance
If you’ve never used a sauna, infrared is the most approachable starting point. The lower air temperature (120 to 150°F versus 150 to 190°F) feels far less intense, and sessions are easier to tolerate for 15 to 30 minutes. People who are sensitive to extreme heat, have low blood pressure, or simply dislike the feeling of breathing very hot air often prefer infrared.
Traditional sauna enthusiasts tend to prefer the ritual: the blast of dry heat, the hiss of water on rocks, the ability to modulate humidity in real time. The experience is more intense and often shorter, with sessions of 5 to 20 minutes interspersed with cool-down breaks. Steam rooms appeal to people who want respiratory benefits or enjoy the sensation of moist heat on their skin, but the near-100% humidity can feel claustrophobic and makes it hard to stay in for long stretches.
Practical Costs and Space
Infrared saunas are generally the most affordable and space-efficient option for home use. A one- or two-person infrared cabin plugs into a standard household outlet, heats up in 15 to 20 minutes, and fits in a spare room or large closet. Traditional saunas require more power (often a dedicated 240-volt circuit), take 30 to 45 minutes to preheat, and ideally need proper ventilation and drainage. Steam rooms require waterproofing, a steam generator, and a fully sealed enclosure, making them the most complex and expensive home installation.
Operating costs follow the same pattern. Infrared panels draw less electricity per session than a traditional sauna heater, and the shorter preheat time adds up over months of regular use.
EMF Concerns With Infrared Saunas
Because infrared saunas use electrical heating panels positioned close to your body, some buyers worry about electromagnetic field exposure. International safety limits allow up to 2,000 milligauss for prolonged exposure, but precautionary standards used by wellness practitioners and some European countries target under 3 milligauss in occupied areas. Modern low-EMF infrared models are designed to stay below 3 milligauss at the head and torso while seated, and some ultra-low models achieve readings below 0.5 milligauss through advanced shielding. If this matters to you, look for third-party EMF testing data from the manufacturer rather than vague “low-EMF” marketing claims.
Choosing the Right Wood
The interior wood matters more than most buyers realize, especially in an enclosed space at high temperatures. Aspen is considered the most hypoallergenic option and releases the lowest levels of volatile organic compounds when heated. It’s a good choice if you’re sensitive to strong scents or chemical off-gassing. Spruce is the standard across Finland and much of Europe, offering a good balance of durability and low reactivity. Cedar is popular in North America for its natural resistance to moisture and rot, though it does release aromatic compounds that some people find pleasant and others find irritating, particularly in infrared saunas where you sit closer to the wood panels for longer periods.
How Often and How Long to Use a Sauna
The cardiovascular and longevity data points toward frequent use: four to seven sessions per week showed the greatest risk reductions. Most studies used sessions lasting 15 to 30 minutes at a time. For traditional saunas, the Finnish pattern of multiple short rounds (5 to 20 minutes each) separated by cool-down periods is well-established. Infrared sauna studies typically used single sessions of 15 to 30 minutes at around 140°F.
If you’re new to sauna use, start with shorter sessions at lower temperatures and build up over a few weeks. Hydration matters more than most people expect. You can lose a pint or more of sweat in a single session, so drink water before, during, and after. The benefits appear to be cumulative over time rather than dramatic after any single session, so consistency matters more than intensity.