Are Infrared Saunas Safe? Risks, EMF, and What the Research Says

Short answer: for most healthy adults, yes — infrared saunas are considered safe when used sensibly. But "sensible" does real work in that sentence, and a few groups should check with a doctor first. Here's what the research actually says, including the honest caveats.

This article is for information only and isn't medical advice. If you have a heart condition, high or low blood pressure, are pregnant, or take medication affecting heat tolerance, talk to your doctor before using any sauna.

What the research says about sauna safety

The reassuring news: in the large Finnish studies that tracked thousands of sauna users over decades, researchers found no safety red flags for healthy adults — quite the opposite. The 20-year study of 2,315 men that found lower cardiovascular mortality with frequent sauna use (Laukkanen et al., JAMA Internal Medicine, 2015) reported no pattern of harm among regular users. One caveat: those long-term studies tracked traditional Finnish saunas, not infrared ones — Laukkanen himself has noted his group's findings can't be applied directly to infrared saunas, and long-term evidence specific to infrared use is still limited. For infrared specifically, a 2009 review of far-infrared saunas found only limited evidence for the claimed health benefits, but the included clinical trials reported no adverse events, and one concluded far-infrared was a "safe and effective adjunct therapy" for heart-failure patients (Beever, Canadian Family Physician, 2009).

Sauna-related emergencies are rare and almost always involve the same ingredients: alcohol, extreme dehydration, pre-existing heart conditions, or very high heat combined with long sessions. Used the way manufacturers recommend — moderate temperature, 15–30 minutes, hydrated — infrared saunas have an excellent safety record.

What about EMF?

This is the most common safety question specific to infrared saunas, so let's address it directly.

EMF (electromagnetic field) is emitted by anything electrical — your phone, your microwave, and yes, sauna heaters. The concern is prolonged close-range exposure to the panels while you sit inches away for 20–30 minutes.

The practical answer: low-EMF saunas exist precisely for this. Low-EMF models are built with shielded panels and wiring designed to keep EMF levels at the bench very low — often labeled "low EMF" or "near-zero EMF." If EMF exposure concerns you, it's a solvable problem: choose a low-EMF model and the question largely goes away. Browse low-EMF infrared saunas →

There's no scientific consensus that the EMF levels in standard saunas cause harm, but there's also nothing wrong with minimizing exposure when the option costs you nothing.

Who should be cautious

Talk to your doctor first if you:

• Have a heart condition, angina, or uncontrolled high/low blood pressure
• Are pregnant or trying to conceive (see below)
• Take medications that affect blood pressure, heart rate, or heat tolerance (including some blood pressure drugs, diuretics, and antihistamines)
• Have multiple sclerosis or another condition where heat worsens symptoms

Pregnancy: most obstetric guidelines advise avoiding saunas during pregnancy, especially the first trimester, because raising core body temperature significantly carries risks to fetal development. This is one area where "check with your OB" isn't boilerplate — it's the actual recommendation.

Male fertility: worth an honest mention. Studies of traditional Finnish sauna use have found that frequent high-heat sessions can temporarily reduce sperm count and motility — the effect reverses after stopping. If you're actively trying to conceive, it's worth discussing timing with your doctor.

Children and older adults: can use saunas with shorter sessions, lower temperatures, and supervision — but heat tolerance varies a lot, so err conservative.

Safety guidelines for every session

• Hydrate before, during, and after. Bring water in with you.
• Start short: 10–15 minutes until you're acclimated, then 20–30.
• Temperature: 110–150°F is the normal infrared range. Hotter isn't better.
• No alcohol before or during. This is the single biggest risk factor in sauna incidents.
• Eat lightly beforehand — not a big meal, not fully empty.
• Cool down gradually after. A lukewarm rinse is plenty; no need for ice plunges unless that's your thing.
• Listen to your body. Dizziness, nausea, headache, or feeling faint means get out now — every time, no exceptions.
• Don't fall asleep in the sauna. Set a timer if you're the drowsy type.

Common myths, briefly

"Saunas cook your organs." No. Your core temperature rises roughly 1–2°F in a typical session — your body thermoregulates the whole time through sweating. That's the point. (Measured rises vary with sauna type, temperature, and session length.)

"More heat = more benefits." No. The research benefits appear at normal sauna temperatures and frequencies. Endurance suffering isn't a health strategy.

"Infrared is dangerous because it's radiation." Infrared is non-ionizing radiation — the same kind of warmth you feel from sunlight without the UV. It's fundamentally different from X-rays or nuclear radiation. The word "radiation" does a lot of unfair work here.

The bottom line

For healthy adults following basic guidelines, infrared saunas are safe — the long-term research on sauna users is reassuring, not alarming. The real risks are avoidable ones: dehydration, alcohol, ignoring your body, and skipping the doctor conversation when you have a condition that warrants it. Choose a quality low-EMF unit from an authorized dealer, start conservatively, and you'll be fine.

FAQs

Can I use an infrared sauna every day?

Healthy adults generally can, keeping sessions to 20–30 minutes with good hydration. The Finnish research associated the best outcomes with 4–7 sessions per week.

Is it safe to bring my phone in?

Heat and humidity aren't great for electronics, but the bigger reason to leave it outside: twenty unplugged minutes is half the benefit.

Are infrared saunas safe for the heart?

For healthy adults, the evidence says yes — and frequent sauna use is associated with better cardiovascular outcomes. With diagnosed heart conditions, get your cardiologist's sign-off first.

What EMF level is safe in a sauna?

There's no official "safe sauna EMF" standard, which is why low-EMF and near-zero-EMF models exist — they minimize the question entirely. See low-EMF options →

Want the full picture on what saunas do for you? Read infrared sauna benefits →, or start with the home sauna buying guide → if you're still shopping.