Last updated 2026-07-09

What is an infrared sauna and how does it work?

An infrared sauna uses infrared light, specifically far-infrared wavelengths between roughly 5 and 15 micrometers, to heat your body directly rather than heating the air around you. The heaters (usually carbon panels, ceramic rods, or a blend of both) emit radiant energy that your skin and underlying tissue absorb. Your core temperature rises even though the cabin air stays relatively cool. Typical operating temperature is 120-150°F (49-65°C), which is 50-80 degrees cooler than a traditional Finnish-style sauna and far cooler than most people imagine when they hear the word "sauna" ^[1].

Because the air temperature is lower and there's almost no humidity, most people can sit in an infrared cabin for 30-45 minutes without feeling suffocated. That's the main reason infrared caught on commercially: more accessible, longer session, easier on the cardiovascular system for beginners. The trade-off is that the heat feels fundamentally different from a traditional sauna or steam room. You sweat steadily but you don't get that wall-of-heat sensation.

Carbon panels distribute heat more evenly across the body; ceramic emitters run hotter and more concentrated. Most modern home infrared units use a carbon-ceramic hybrid. Some brands also market near-infrared emitters (wavelengths under 1.4 micrometers), which penetrate tissue differently, but the overwhelming majority of consumer products are far-infrared.

For a broader look at what owning one actually involves, the home sauna guide on this site walks through installation, space, and cost in detail.

What is a steam sauna (steam room) and how does it work?

A steam room, sometimes marketed as a "steam sauna" even though purists separate the two, generates heat through a steam generator that boils water and pumps wet vapor into a sealed, tile-lined enclosure. Air temperature sits at 100-115°F (38-46°C), which sounds lower than a traditional sauna, but the near-100% relative humidity makes it feel dramatically hotter because sweat can't evaporate from your skin to cool you down ^[2].

The environment is nothing like infrared. Heat moves by convection and conduction here, not radiation. You're sitting in hot, wet air. The respiratory effect is pronounced: the humidity opens airways, loosens mucus, and delivers heat directly to the bronchial passages, which is why steam rooms have a long history in respiratory therapy settings.

Steam rooms need a waterproof enclosure, good drainage, and a steam generator rated to the room's cubic footage. They're almost always tile or acrylic, not wood, because wood would rot at that humidity level. That construction requirement makes them more expensive and more complex to install at home than infrared units. At a gym, the gym steam room sauna setup is usually the two side by side because the experiences differ enough that many facilities offer both.

For more background on the steam side specifically, the steam room overview covers what to expect from a session and the construction basics.

Infrared vs steam sauna: the key differences at a glance

Here's a side-by-side comparison of the numbers that actually matter when you're deciding. Every figure in this table comes from manufacturer specifications, published research, or energy cost data, not marketing copy.

The session-length gap matters more than most buyers realize. A 20-minute steam room session at high humidity can put a cardiovascular load on you similar to a 30-40 minute infrared session, because the apparent temperature runs so much higher. That's not a reason to avoid one or the other, but it changes how you plan your recovery protocol.

Source notes: temperature ranges from the North American Sauna Society and published sauna research; cost estimates from retail market research ^[1][3].

What does the research say about health benefits?

This is where honest hedging matters. The sauna research base is large and generally positive, but most of it was done in traditional Finnish saunas at 175-195°F, not infrared cabins or steam rooms. When you see a study cited to support infrared sauna benefits, read the methodology carefully: many wellness claims get laundered through Finnish sauna data and applied to infrared without justification.

That said, there is real infrared-specific research. A randomized controlled trial published in the Journal of the American College of Cardiology found that two-week far-infrared sauna therapy in patients with chronic heart failure improved cardiac function and reduced symptoms ^[4]. The authors concluded that "far-infrared sauna therapy is safe and improves cardiac function, exercise tolerance, and quality of life in patients with chronic heart failure." That's a real finding from a real journal, though the patient population was cardiac patients, not healthy adults.

For cardiovascular effects in healthy populations, the best long-term data still comes from Finnish sauna research. A widely cited cohort study of 2,315 Finnish men published in JAMA Internal Medicine in 2015 found that men who used a sauna 4-7 times per week had a 63% lower risk of sudden cardiac death compared to once-weekly users ^[5]. Nobody has replicated this in an infrared-specific cohort at that scale.

Steam rooms have solid evidence for respiratory benefits. Heated, humidified air reduces nasal resistance and can temporarily relieve symptoms of upper respiratory conditions, a finding documented in multiple controlled trials reviewed in the Cochrane database ^[6]. For someone with chronic sinusitis or exercise-induced bronchospasm, the steam room has a meaningful edge over dry-heat options.

For pain and muscle recovery, both modalities raise tissue temperature and blood flow, which aids recovery by mechanisms that are reasonably well understood. Nobody has good head-to-head data comparing infrared recovery outcomes to steam recovery outcomes in athletes. The closest evidence comes from the general heat therapy literature.

The sauna benefits article on this site goes deeper on the research, including what the Finnish data actually measured and why extrapolating to home saunas requires care.

Which is better for weight loss or detox?

Both claims circulate heavily in marketing and deserve a direct answer.

Weight loss: any water lost from sweating in a sauna or steam room comes back the moment you rehydrate. You are not burning meaningful fat in a 20-minute session. The caloric expenditure from heat stress (your heart rate rises, your body works to regulate temperature) is real but modest, somewhere in the range of 100-300 calories for a typical session depending on length and intensity. That's roughly a brisk 20-30 minute walk, not a training session. Anyone selling sauna use as a weight loss tool is overstating the evidence.

Detox: your liver and kidneys handle detoxification. Sweat does contain trace amounts of certain heavy metals and bisphenols, and some studies have measured arsenic, cadmium, lead, and mercury in sweat ^[7]. But the clinical significance of sweating out those small amounts, compared to what your kidneys filter, is not established. Calling sauna use "detoxifying" is technically defensible in a narrow sense and functionally misleading as a health promise.

Both infrared and steam saunas produce roughly comparable sweat volumes in equivalent sessions. Infrared users often report sweating more relative to perceived effort because the session runs longer and cooler, but total sweat output between the two in matched-time protocols is not dramatically different.

Infrared vs steam sauna: which is better for your skin?

Steam rooms have an edge for surface skin hydration. The high humidity deposits moisture on the skin surface, which can improve the look and feel of skin during and right after a session. Aestheticians have used steam for facial prep for decades because it opens pores and softens the stratum corneum, making exfoliation and cleansing more effective.

Infrared proponents argue that deeper tissue warming increases circulation to the skin and may improve collagen production over time, and there is some limited research on near-infrared light and skin health, though most of it comes from clinical red-light therapy devices, not whole-body cabin heaters ^[8]. The evidence for far-infrared specifically improving skin texture or collagen in healthy adults is thin.

For acne-prone skin, be careful with steam. High humidity plus heat creates a warm, moist environment that some people find worsens breakouts, particularly if they don't rinse their face right after. Infrared's dry heat is generally more tolerable for sensitive or acne-prone skin.

On skin: steam wins for immediate hydration and pore opening; infrared may have a mild circulation benefit. Neither is a medical skin treatment, and neither should be used as one without dermatologist guidance.

What about cost? How much does each option run at home?

Cost is where infrared has a clear, practical advantage for most homeowners.

A 1-2 person home infrared sauna runs $1,500-$4,000 for a decent unit. A 3-4 person model from a quality brand runs $3,000-$7,000. These plug into a standard 120V or 240V outlet (larger units need 240V), install in a few hours with basic tools, and need no plumbing. Operating costs stay low because the element wattage is modest, typically 1,500-3,000 watts, and sessions are short ^[3].

A home steam room needs a waterproof enclosure (usually a tile contractor job), a steam generator (typically $500-$2,000 for the unit alone), proper drainage, a GFCI-protected electrical circuit, and ideally a ventilation plan to manage condensation in adjacent spaces. Total installed cost for a custom home steam room typically runs $4,000-$15,000+ depending on size and finish level. Operating costs are higher because you're boiling water the whole session.

At a gym, the math flips. If you already have a membership to a gym with sauna and steam room access included, neither costs you extra per session. Gyms with sauna and steam room access are common in mid-to-upper tier fitness chains. If you're choosing a gym partly on recovery amenities, confirm whether the facility has both or just one.

SweatDecks carries a range of home infrared units across multiple size and price points if you want to compare specs before committing: sweatdecks.com.

For outdoor placement, an outdoor sauna setup (usually a traditional or infrared barrel design) is often cheaper than a custom indoor steam room and more durable than dragging steam equipment outside.

Which is easier to install at home?

Infrared wins, and it's not close.

Most home infrared saunas ship as prefab modular panels that interlock without tools beyond a screwdriver and a rubber mallet. A two-person unit takes two people about 2-3 hours to assemble in a spare room, garage, or basement. You need a flat floor, adequate ceiling height (most units need 6.5-7 feet), and the right electrical outlet. Many 1-2 person units run on standard 120V 15-amp circuits; larger units need a dedicated 240V circuit, which an electrician can add for $200-$500.

Steam rooms need waterproofing across the entire enclosure, which means a contractor, tile work, a membrane layer, and proper floor sloping for drainage. The steam generator needs its own dedicated electrical circuit and a water supply line. Convert an existing bathroom corner into a steam enclosure and you're looking at a renovation project, not an assembly afternoon.

If simplicity and speed matter to you, infrared is the obvious choice. If you have an existing tile shower you want to convert, some manufacturers sell add-on steam generators that retrofit into a shower enclosure, which brings the cost down considerably, around $1,000-$3,000 installed if the existing space already has the waterproofing.

For people who want flexibility without a permanent build, a portable sauna option (typically a fabric infrared enclosure) sets up and comes down in under 15 minutes and plugs into any standard outlet.

Steam vs infrared sauna: which is better for respiratory health?

Steam rooms have the stronger evidence base here, and the mechanism is straightforward. Breathing hot, humid air loosens secretions in the respiratory tract, reduces nasal resistance, and can temporarily open constricted airways. The Cochrane Collaboration has reviewed steam inhalation for upper respiratory infections and found it provides modest symptomatic relief without meaningful risk ^[6]. Facilities and spas have used steam rooms for respiratory support for well over a century.

For people with asthma, the picture is mixed. Some asthmatics find moist heat soothing; others find that high humidity and extreme temperatures trigger bronchospasm. If you have asthma, test your response carefully and talk to your doctor before using either modality regularly. Neither a steam room nor an infrared sauna treats asthma.

Infrared's dry air is generally easier to breathe for people who find steam oppressive. If you have claustrophobia or COPD, the low-humidity, lower-temperature environment of an infrared cabin is usually more manageable. But "easier to breathe" is not the same as "better for your lungs."

For active respiratory symptoms or airway health, steam has the practical and evidence edge. For people who struggle with humidity or have reactive airways, infrared is safer and more comfortable.

Can you use an infrared sauna or steam room every day?

For healthy adults, daily use of either modality appears safe and may be beneficial. The Finnish research that found cardiovascular benefits used a frequency of 4-7 times per week as the highest-benefit group ^[5]. That's not a controlled trial prescribing daily use, but it does suggest that frequent regular use over years is not harmful in healthy people.

Practical constraints matter more than safety for most people. Daily steam room use at home requires the infrastructure to support it. Daily infrared use is realistic and low-cost once you own the unit.

Dehydration is the main risk with frequent use. Either modality causes significant fluid loss. Rehydrating with water and electrolytes before and after each session is required, not optional. Signs of dehydration, including dizziness, headache, or nausea during a session, mean you should exit immediately.

Pregnant women should avoid both modalities, or at minimum consult an OB-GYN, because elevated core body temperature in the first trimester is associated with neural tube defects ^[9]. People with cardiovascular disease, hypotension, or conditions affecting temperature regulation should get medical clearance before starting regular sauna or steam use.

For most healthy adults who want to add sauna to their routine, pairing heat exposure with contrast therapy (cold after heat) is increasingly popular. The cold plunge and ice bath guides cover the contrast therapy side in detail.

Which should you choose: infrared or steam?

There is no universally correct answer, and anyone who tells you one is definitively better is selling something. What follows is my honest read based on the evidence and the practical realities.

Choose infrared if: you're buying for home use and want simple installation; you have respiratory sensitivity or claustrophobia; you prefer longer, lower-intensity sessions; your budget is under $5,000 all-in; or you're mainly after cardiovascular and recovery benefits, where the evidence base for heat therapy in general is solid.

Choose a steam room if: you have respiratory congestion or sinus issues and want the moist-heat benefit; you're building or renovating a bathroom and can fold the tile work in efficiently; you prefer the intense, traditional wet-heat experience; or you're setting up a commercial facility where the durability of tile construction pays off.

Choose a gym membership if: you don't want to own either, you want to try both before committing, or you're in an apartment or rental where permanent installation isn't feasible. Gyms with sauna and steam room access let you experience both environments repeatedly before spending thousands on home equipment.

If you do decide to buy for home use, SweatDecks has a curated selection of infrared saunas for one to six people across a range of budgets at sweatdecks.com. The inventory skews toward quality mid-range units, not the cheapest panels on the market.

A note on combining modalities: many serious heat therapy practitioners use both, alternating sauna heat with cold exposure in a contrast protocol. The cold plunge benefits guide explains what the research says about the hot-cold cycle, which is where the most interesting recovery physiology happens regardless of which heat modality you choose.

Frequently asked questions

Is an infrared sauna or steam room better for weight loss?

Neither is a meaningful weight loss tool on its own. The water weight lost in a session returns when you rehydrate. The caloric burn from heat stress is roughly 100-300 calories per session, comparable to a brisk walk. Both modalities produce similar sweat volumes in matched sessions. If weight management is the goal, neither has a real edge over the other, and regular exercise still matters far more.

Can I use an infrared sauna if I have cardiovascular disease?

A study in the Journal of the American College of Cardiology found far-infrared therapy improved cardiac function in heart failure patients, but that was a medically supervised protocol. If you have cardiovascular disease, get your cardiologist's clearance before starting regular use. The lower temperatures of infrared (120-150°F) are generally considered more tolerable than traditional sauna heat for cardiac patients, but individual risk varies significantly.

What's the difference between a sauna and a steam room at the gym?

A gym sauna (usually traditional or sometimes infrared) runs at 150-195°F with low humidity, typically 10-20%. A gym steam room runs at 100-115°F with near-100% humidity. The steam room feels hotter despite the lower temperature because sweat can't evaporate from your skin. Steam room sessions run shorter, 10-20 minutes versus 20-40 in a sauna, for comparable physiological load.

Which is cheaper to run at home, infrared or steam?

Infrared is cheaper by a meaningful margin. A typical home infrared sauna uses 1,500-3,000 watts and runs for 30-45 minutes, adding roughly $0.50-$2.00 per session to your electricity bill. A steam generator boils water continuously and uses more energy, pushing costs to $1.00-$4.00 per session. Over a year of daily use, that difference adds up to several hundred dollars.

Is a steam room better than a sauna for a cold or sinus congestion?

For upper respiratory symptoms, steam has the better evidence base. Breathing hot, humid air reduces nasal resistance and loosens mucus, which is why steam inhalation has been used medicinally for centuries. The Cochrane Collaboration found modest symptomatic relief from steam for upper respiratory infections. A dry-heat infrared sauna offers some warmth benefit but does not deliver the moist air that makes steam rooms effective for congestion.

How long should I stay in an infrared sauna versus a steam room?

Most infrared sauna sessions run 20-45 minutes at 120-150°F. Steam room sessions run shorter, 10-20 minutes, because the high humidity creates a more intense physiological load despite the lower air temperature. Start at the low end of each range if you're new, stay well hydrated, and exit immediately if you feel dizzy, nauseated, or lightheaded. Neither modality rewards pushing through discomfort.

Can infrared saunas or steam rooms help with skin?

Steam rooms hydrate the skin surface and open pores during a session, which is why estheticians use steam for facial prep. That effect is real but temporary. Infrared may improve skin circulation over time, and some limited research on red-light therapy (a related technology) suggests collagen benefits, but solid evidence for far-infrared improving skin in healthy adults is thin. Rinse your skin after either session to remove sweat and debris.

Do I need special electrical for a home infrared sauna?

It depends on the size. One-to-two person infrared units often plug into a standard 120V 15-amp outlet, the kind in any room of your house. Larger units (3+ person) typically need a dedicated 240V circuit, which an electrician can install for roughly $200-$500. Always check the manufacturer's specs before buying, and never use an extension cord with a sauna unit. Steam generators universally require a dedicated circuit and a water supply line.

Is it safe to use a sauna or steam room every day?

For healthy adults, daily use appears safe and may be beneficial. The Finnish cohort study tracking 2,315 men found those using sauna 4-7 times per week had the best cardiovascular outcomes over 20 years. The main practical risks are dehydration and overheating. Rehydrate before and after each session. Pregnant women should avoid both modalities. Anyone with cardiovascular disease, hypotension, or temperature regulation disorders should get medical clearance first.

What are the main risks of using a steam room versus an infrared sauna?

Both carry risks of dehydration, overheating, and heat-related illness if sessions run too long. Steam rooms add a mold and bacterial growth risk if the enclosure isn't properly cleaned and ventilated, since the persistently wet environment is ideal for microbial growth. Infrared saunas carry a slight electrical risk if improperly installed. Public steam rooms and saunas raise hygiene considerations. Always sit on a clean towel and shower after.

Can you use a steam room with infrared sauna together?

Yes, and some high-end home and spa setups include both. There's no physiological reason you can't use them in the same session or back-to-back, though the combined heat load would be significant. A practical approach is to use one per day rather than stacking them unless you're well acclimated and well hydrated. Many users add a cold plunge between heat sessions as contrast therapy, which has its own recovery evidence base.

Are infrared saunas worth it compared to a gym membership with a steam room?

If you'd use a home sauna 3-5 times per week, a $3,000-$5,000 infrared unit pays back against a gym membership with sauna access ($50-$100/month) in roughly 3-5 years, assuming you still work out at home or elsewhere. If you'd go irregularly, the gym wins on economics. The home unit wins on convenience, privacy, and the ability to use it right after training without driving anywhere.

Which is better for muscle recovery, infrared or steam?

Both raise tissue temperature and blood flow, which supports muscle recovery by delivering oxygen and clearing metabolic byproducts. No well-powered head-to-head trial has compared infrared recovery outcomes to steam room outcomes in athletes. General heat therapy literature supports both. The infrared advantage for recovery is practical: you can do a longer session more comfortably. Pairing either with cold exposure afterward is the protocol with the most practitioner adoption.

Sources

1. CDC, Healthy Swimming and Water Recreation: Hot Tubs and Steam Rooms: Steam rooms operate at near-100% relative humidity at 100-115°F, which prevents normal sweat evaporation and intensifies the heat experience
2. U.S. Department of Energy, Home Heating and Cooling Cost Estimator: Electricity cost estimates for home sauna operation based on wattage and session duration
3. Journal of the American College of Cardiology, Waon Therapy for Managing Chronic Heart Failure (Tei et al., 2002/2009): Far-infrared sauna therapy significantly improved cardiac function, exercise tolerance, and quality of life in chronic heart failure patients
4. JAMA Internal Medicine, Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events (Laukkanen et al., 2015): Finnish men using sauna 4-7 times per week had 63% lower risk of sudden cardiac death vs. once-weekly users in a cohort of 2,315 men
5. Cochrane Database of Systematic Reviews, Steam Inhalation for Acute Upper Respiratory Infections (Singh et al.): Steam inhalation provides modest symptomatic relief for upper respiratory infections and reduces nasal resistance
6. Archives of Environmental and Contamination Toxicology, Arsenic, Cadmium, Lead, and Mercury in Sweat (Sears et al., 2012): Sweat contains measurable trace amounts of heavy metals including arsenic, cadmium, lead, and mercury, though clinical significance vs. renal clearance is not established
7. National Institutes of Health, PubMed: Photobiomodulation and Skin Health: Near-infrared and red-light therapy research documents some skin collagen effects, but most evidence is from clinical devices, not whole-body far-infrared cabin heaters
8. American College of Obstetricians and Gynecologists, Heat Exposure During Pregnancy (Committee Opinion): Elevated maternal core body temperature in the first trimester is associated with increased risk of neural tube defects; pregnant women should avoid saunas and steam rooms or consult a physician
9. Mayo Clinic, Sauna Health Benefits: Are Saunas Healthy or Harmful?: General guidance on sauna safety, hydration requirements, and contraindications for cardiovascular and other health conditions
10. International Journal of Environmental Research and Public Health, Health Effects of Voluntary Exposure to Hot Environments (Laukkanen et al., 2018): Regular sauna bathing associated with improvements in cardiovascular, respiratory, and musculoskeletal health across multiple observational studies