What Is the Downside to an Infrared Sauna?
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The main downside to an infrared sauna is the heat itself: dehydration, lightheadedness, and overheating if you sit too long or skip water. Upfront cost, the floor space a cabin needs, electricity use, and extra caution for people with certain health conditions round out the honest tradeoffs worth knowing before you buy.
The short answer
The biggest downside to an infrared sauna is heat stress. Sessions raise your core temperature, so dehydration, dizziness, and fatigue are real risks if you stay in too long, sit at too high a setting, or do not drink enough water. People with heart conditions, low blood pressure, or who are pregnant face higher risk and should talk with a clinician first. Beyond health, the practical drawbacks are upfront cost, the floor space a cabin needs, ongoing electricity, and the wait while the unit heats up. Lower quality cabins can also produce higher EMF readings, though reputable brands engineer for low EMF. None of these are reasons to avoid infrared saunas outright. Used sensibly, with short sessions, steady hydration, and a quality cabin, most healthy adults tolerate them well. Knowing the tradeoffs helps you buy the right unit and use it safely from the first session.
Can an infrared sauna be bad for your health?
For most healthy adults, no. The Mayo Clinic reports no harmful effects in the available studies on infrared sauna use, and considers it generally safe when used properly. The problems show up when sessions run long or hydration falls behind.
Heat raises your core temperature and opens up blood vessels, which is part of how a sauna works. That same vasodilation can cause lightheadedness or a brief drop in blood pressure when you stand up. Sweating without replacing fluids leads to dehydration, and most post-sauna headaches trace back to that rather than the heat itself. Push a session past your tolerance and you can reach nausea, weakness, or heat exhaustion.
These effects are dose dependent. Short, well-hydrated sessions rarely cause trouble. Long sessions at maximum heat, especially for someone new to sauna use, are where the risk climbs. Healthline's review of infrared sauna dangers reaches the same conclusion: the risks are mostly tied to overuse and pre-existing conditions.
Do infrared saunas have an EMF problem?
This is the downside buyers ask about most, and the honest answer is that it depends on the cabin. Every electric heater produces some electromagnetic field. In well-built infrared saunas, EMF at the seat is engineered down to very low levels. Many reputable makers target what the industry calls ultra-low EMF, generally under 3 milligauss for the magnetic field measured at the seating position.
Older or budget cabins with unshielded heaters are a different story and can read higher near where you sit. The takeaway is not to avoid infrared saunas, but to buy from a brand that publishes its EMF testing and to favor low-EMF heater designs. If near-infrared and red light matter to you, our guide to saunas with red light therapy walks through how those wavelengths are delivered.
Who should not use an infrared sauna?
Some people should be cautious or skip infrared saunas until they have medical clearance. Talk with your doctor before your first session if any of the following apply to you.
- Pregnancy: a raised core temperature can pose risks to fetal development, especially in the first trimester, so infrared saunas are generally not recommended during pregnancy.
- Heart disease, recent cardiac events, or unstable blood pressure: heat stress and vasodilation add load and can cause dizziness.
- Pacemakers or implanted metal devices: confirm with your cardiologist before use.
- Trouble sweating or sensing heat: including anyone taking medication that impairs heat regulation.
This is general information, not medical advice. Because heat affects people differently, a quick conversation with your own clinician is the safest way to decide if an infrared sauna fits your situation.
What are the practical downsides of owning one?
Set health aside and the remaining drawbacks are about cost, space, and routine. None are dealbreakers, but they shape which unit is right for your home.
| Downside | What to expect | How buyers handle it |
|---|---|---|
| Upfront cost | Quality home infrared cabins commonly run from roughly $2,000 to $9,000 depending on size and features | Financing and HSA/FSA eligibility spread or offset the cost |
| Floor space | A one to two person cabin needs a dedicated corner; larger units need more | Measure first and use a portable or one person model in tight spaces |
| Electricity | Infrared draws less than traditional heaters but still adds to the power bill | Short, regular sessions keep running cost modest |
| Heat-up time | Cabins take roughly 10 to 20 minutes to reach temperature | Pre-heat while you change and hydrate |
| Maintenance | Wood needs occasional wiping; heaters last years but are not forever | Simple cleaning and good airflow extend lifespan |
For a deeper look at running cost, our article on whether an infrared sauna is expensive to own breaks down the monthly numbers, and are infrared saunas worth it weighs the full value picture.
How do you avoid the downsides of an infrared sauna?
Almost every risk above is manageable with good habits and a good cabin. Use this short checklist:
- Keep sessions to 15 to 30 minutes, and start at 10 to 15 minutes if you are new.
- Drink water before and after, and skip alcohol beforehand.
- Use a moderate temperature rather than the maximum, especially at first.
- Step out at the first sign of dizziness, nausea, or a racing heart.
- Buy a low-EMF cabin from a seller that shares its testing and warranty.
- Get medical clearance if you are pregnant, have a heart condition, or use a pacemaker.
Choosing the right unit matters as much as how you use it. Our infrared sauna buying guide covers sizing, heater type, EMF, and warranty so you can compare cabins with clear eyes.
Frequently asked questions
Is it OK to use an infrared sauna every day? Many healthy adults use one daily with short sessions and good hydration. If you are new, start a few times a week and build up. Pay attention to how you feel and scale back if you notice fatigue or headaches.
What happens if you stay in an infrared sauna too long? Overstaying raises the odds of dehydration, dizziness, nausea, and heat exhaustion. The fix is simple: cap sessions at 15 to 30 minutes, hydrate, and leave early if you feel off rather than pushing through.
Are cheap infrared saunas safe? Some are, but budget cabins are where higher EMF, weaker materials, and short warranties tend to appear. Look for published EMF testing, quality wood, a real warranty, and support you can reach before deciding on price alone.
The bottom line
The downsides of an infrared sauna are real but manageable: heat related risks, upfront cost, space, and extra caution for certain health conditions. Pick a low-EMF, well-built cabin and use it sensibly and most healthy adults do fine. When you are ready to compare options, browse our infrared saunas. As an authorized retailer we offer free US shipping, financing, and HSA/FSA eligibility, and a real person on our team is glad to help you size the right unit. Reach out any time.