“Low-EMF” is a marketing term — no regulator or industry body defines it for saunas. A meaningful EMF claim needs five things: a number (in mG or V/m), the distance, the body position, the field type (magnetic vs electric), and a named third-party lab. Without those, “low-EMF” tells you nothing.
“Low-EMF” is a marketing term, not a standard
Search “low EMF infrared sauna” and nearly every major brand’s page uses some version of the phrase — “low-EMF,” “near-zero EMF,” “ultra-low EMF.” None of them are quoting a shared definition, because none exists. No regulator, no standards body, and no sauna-specific code sets a threshold that earns a product the right to call itself “low-EMF” Convention. One infrared retailer, Haven of Heat, says as much directly on its own EMF page, noting that labels like these “aren’t regulated by any governing body” Haven of Heat.
This guide assumes infrared is already the plan. If you’re still weighing infrared against a traditional (Finnish) sauna in the first place, that type decision — not EMF — is covered in our traditional vs. infrared guide; everything below is about reading an infrared unit’s EMF marketing once you’re already looking at one.
That doesn’t make the phrase meaningless everywhere — it makes it meaningless on its own. The industry has settled into rough, self-assigned conventions: a reading under 3 mG at seated position commonly gets called “low,” under 1 mG gets called “ultra-low” Convention — industry benchmark, unregulated. Those thresholds show up because enough brands independently converged on them, not because a regulator wrote them down. They’re a useful shorthand once you know what’s behind them, and an empty one when a page prints the word “low” with no number attached at all — which is exactly how a lot of marketing copy uses it.
What a meaningful EMF claim actually contains
A number by itself proves nothing. “0.5 mG” and “80 mG” both sound precise, but neither means anything without four more pieces of information sitting next to it. This is the actual test — the one differentiator a buyer can apply to any brand’s page in under a minute, regardless of which way the number itself points.
| Element | Why it matters | Red flag if missing |
|---|---|---|
| A number | Words like “low” or “safe” carry no measurable information on their own | No mG or V/m figure anywhere on the page |
| Distance | Field strength drops sharply as you move away from the source | A number with no stated distance from the panel |
| Body position | A panel-surface reading and a seated reading can differ by several multiples | “Tested at the panel” instead of at seated position |
| Field type | Magnetic (mG) and electric (V/m) are different fields, measured separately | Only a magnetic figure, with no electric-field number anywhere |
| Named third-party lab | In-house or unnamed testing can’t be checked or reproduced | “Independently tested” with no lab or report named |
Magnetic (mG) vs electric (V/m) — reported separately
Magnetic and electric fields are physically different things, measured with different instruments, and reported in different units — magnetic field strength in milligauss (mG), electric field strength in volts per meter (V/m). A brand that quotes only one number, almost always the magnetic reading, is telling you half the story, and not necessarily by design: magnetic-field meters are cheaper and more common, so magnetic-only testing is often just the default a lab reaches for first. Whichever field is missing from a spec sheet is the one worth asking about before you take the other number at face value.
Why distance and seated-vs-panel position change everything
EMF strength falls off sharply with distance from the source — a reading taken at the panel’s surface and a reading taken where your body actually sits during a session can differ by several multiples. Sun Home’s third-party-verified distance curve makes the shape of that drop-off concrete: 0.6–4.0 mG at one foot from a panel, 0.4–1.8 mG at two feet, and 0.3–0.9 mG at three feet Vitatech Electromagnetics, report VTE-3534, Jan 2025. A single headline figure like “0.5 mG” is doing a lot of unstated work if it doesn’t say which of those distances — or which body position — it was measured at.
Magnetic field vs. distance from the panel
Sun Home’s third-party-verified distance curve
A number with no stated distance is missing the variable that changes it most.
Source: Vitatech Electromagnetics, report VTE-3534, Jan 2025.
Text alternative: Sun Home’s third-party-verified magnetic-field readings (Vitatech Electromagnetics, report VTE-3534, January 2025) fall as distance from the panel increases — 0.6 to 4.0 milligauss at one foot, 0.4 to 1.8 milligauss at two feet, and 0.3 to 0.9 milligauss at three feet. The same source separately reports a 0.5 milligauss headline figure at seated position; that figure is shown here as its own reference line, not plotted at the three-foot mark, because the source does not state which distance seated position corresponds to. Takeaway: a claim with no stated distance is missing the variable that changes the reading most.
The reference levels that do exist (and what they actually are)
“Low-EMF” has no sauna-specific standard, but EMF exposure reference levels do exist elsewhere — written for the electricity around you every day, not for saunas specifically. Knowing what each one actually governs is most of the work in reading a brand’s claim honestly.
You’ll see “ICNIRP’s reference level is 200 mG” repeated across sauna and EMF-adjacent sites. That figure is off by a factor of ten. ICNIRP’s actual 2010 general-public reference level for 50 Hz magnetic fields is 200 microtesla (µT) — and 200 µT converts to 2,000 mG, not 200 mG ICNIRP 2010, Health Phys. 99(6):818–36. For reference, the prior 1998 value was 100 µT, or 1,000 mG — ICNIRP raised the reference level in the 2010 revision, it didn’t lower it. The mistake likely started as a decimal slip somewhere upstream and has since propagated through enough secondary sources to read as settled fact. It isn’t — the correct figure is confirmed independently via Belgium’s BioElectroMagnetics Group and Germany’s Federal Office for Radiation Protection (BfS).
“…recommends a reference value of 200 µT for magnetic fields at the frequency 50 Hz.”Germany’s Federal Office for Radiation Protection (BfS), describing the ICNIRP 2010 revision
Two other figures get cited alongside ICNIRP in EMF discussions, and neither is a sauna standard either. Swedish MPR II sets a 2.5 mG guideline — but it’s a 1990s computer-monitor emissions standard, borrowed into the EMF-safety conversation because it’s a round, citable number, not because anyone wrote it with saunas in mind Convention. The BioInitiative Report, an advocacy document rather than a regulatory standard, proposes a far more precautionary long-term target: 1 V/m electric field and 1–2 mG magnetic field BioInitiative Working Group — advocacy, not a regulatory standard. It’s the figure High Tech Health’s electric-field argument, below, measures itself against.
| Source | Value | Type | What it actually governs |
|---|---|---|---|
| ICNIRP (2010) | 5 kV/m electric · 2,000 mG magnetic (200 µT), both at 50 Hz | Regulatory reference standard | General-public EMF exposure from any 50 Hz source — not sauna-specific |
| Swedish MPR II | 2.5 mG | Guideline | Computer-monitor emissions — not a sauna standard |
| BioInitiative Report | 1 V/m electric · 1–2 mG magnetic (long-term) | Advocacy, precautionary | A proposed precautionary target, not a regulatory limit |
| Industry convention | <3 mG “low” · <1 mG “ultra-low” | Unregulated marketing convention | Self-assigned brand labeling at seated position — not a standard |
One figure circulates specifically in sauna marketing: “the EPA proposed 3 mG” as a safety threshold, most visibly on Clearlight’s EMF pages Clearlight. No primary EPA standard confirms this figure exists. Treat it as industry lore that’s been repeated often enough to sound official — not as a citable government standard, unless a primary source turns up.
A second figure travels alongside it on the same pages: “Sweden 3 mG.” The actual Swedish reference is Swedish MPR II, the 1990s computer-monitor emissions guideline already noted above — and its figure is 2.5 mG, not 3 mG. Whether “Sweden 3 mG” is a rounded misquote of MPR II or a separate garbled figure, no primary source confirms a 3 mG Swedish threshold. Treat it the same way as the EPA figure: unverified, not a citable standard.
What third-party verification actually looks like
The gap between a real EMF claim and marketing copy shows up clearly once you compare how two brands source their numbers.
Sun Home’s EMF testing is the version done right: an outside lab (Vitatech Electromagnetics), a named report number (VTE-3534), a dated test (January 2025), a stated instrument and method (fluxgate magnetometer, RMS measurement), a stated body position (seated), and the full distance curve Vitatech Electromagnetics, VTE-3534. Its headline figure — 0.5 mG at seated position — means something specifically because every other element is filled in.
Clearlight’s EMF claim leans on the same third-party lab — its pages describe results as “near-zero,” Vitatech-verified Clearlight — but the brand’s own supporting citations, the “EPA 3 mG” and “Sweden 3 mG” figures, are the industry-lore numbers flagged above, not independently confirmed standards. A brand can do the third-party testing right and still lean on an unverified number elsewhere on the same page — read each claim on a page on its own, rather than assuming one verified figure vouches for everything around it.
For scale, everyday EMF exposure doesn’t read at zero either, though the two commonly-cited EPRI figures measure different things and shouldn’t be blended into one “home reading.” EPRI’s 1993 survey of 992 homes found “an all-room average magnetic field of 0.9 mG” — an actual household field reading. A separate 1998 EPRI follow-up of over 1,000 people measured something different: average 24-hour personal exposure at “1.25 mG,” a dosimetry figure that includes time at work, in transit, and everywhere else a person spends the day, not a home-specific reading EPRI, via Southern California Edison EMF fact sheet. Neither is a safety verdict — whether any of these numbers, sauna, household, or personal-exposure, carry a biological effect is a separate question this article doesn’t answer (see below) — they’re just useful scale for reading a 0.5 mG or a 3 mG figure against something familiar.
The genuine dispute: electric fields
Most of the “low-EMF” conversation is about magnetic fields, in milligauss. There’s a real, unresolved disagreement sitting one layer down, about the field almost nobody’s marketing copy mentions: electric fields, measured in volts per meter.
Position A (High Tech Health, author Tess Harris, and the building-biology/advocacy camp) argues that a magnetic-only “low-EMF” claim answers half the question. Its own testing puts typical infrared panels at 1,740–2,084 V/m of electric field — and it separately claims typical competitor units run 22–80 mG magnetic and upward of 2,000 V/m electric — while stating its own heaters measure 0.36 mG and 0.089 V/m High Tech Health. 1,740–2,084 V/m is roughly 1,700 times the BioInitiative Working Group’s 1 V/m precautionary target.
Position B (the ICNIRP-framing, mainstream camp) counters that ICNIRP’s actual reference levels — 2,000 mG magnetic, 5 kV/m electric, both at 50 Hz — sit far above anything a sauna produces, and that premium units measure well below them on independent testing. Calore frames its own sub-3 mG at body-distance readings as more than 65 times below the reference level Calore — though that comparison uses the 200 mG figure this article already flagged as a unit error; measured against ICNIRP’s actual 2,000 mG reference, the margin is still comfortably wide, just not by the specific multiple Calore states.
What both agree on: neither side disputes that a sauna’s measured numbers sit below ICNIRP’s general-purpose reference levels. What they disagree on is whether that comparison is the right one to be making at all — Position A argues electric fields deserve their own precautionary standard closer to BioInitiative’s, not just a pass/fail against ICNIRP; Position B treats the regulatory reference level as the relevant bar and considers the question closed once a product clears it.
This article isn’t going to referee that disagreement, and neither side is a neutral party — High Tech Health sells heaters built around minimizing exactly this figure, and the brands citing ICNIRP have an obvious interest in the simpler standard being the right one. What’s being disputed here is exposure and measurement, not health outcomes; whether either exposure level carries any biological effect is a separate question this article does not resolve (see below).
How to read any brand’s EMF page
Bring the five-element test from earlier to any brand’s EMF or safety page and run it as a checklist:
- Is there an actual number, in mG or V/m — not just “low” or “safe”?
- Is a distance stated for that number?
- Is a body position stated — seated, not just “at the panel”?
- Are magnetic and electric fields reported separately, or is one missing entirely?
- Is a named third-party lab and report identified — not just “independently tested”?
If you mentally build that five-item checklist for a brand’s page and one item comes up blank, treat the blank as information, not an oversight. A brand that tested well at every distance and position usually says so, because it’s a selling point. A missing distance, an unnamed “independent lab,” or a magnetic figure with no electric-field number anywhere on the site is a specific, common shape a weak claim takes — not proof of a bad product, but a reason to ask before you trust the number. A budget infrared unit’s “under 8 mG” claim, seen on some marketplace listings, is a common example of the pattern: a number, with no distance, position, or lab named alongside it.
Health effects: what we will and won’t say
Everything above is about exposure and measurement — what a number means, where it came from, and whether it’s comparable to anything else. It is deliberately not about whether that exposure does anything to your body. That’s a different kind of question, and it deserves its own evidence standard rather than a paragraph tacked onto a measurement-literacy guide.
We are not going to declare infrared sauna EMF exposure dangerous, and we are not going to declare it a non-issue either — both would overstate what the underlying literature currently supports in either direction. Physiological and health-outcome claims are handled separately on this site, under their own evidence-tiering, in our safety and evidence coverage. That coverage does not yet include a dedicated review of EMF biological effects specifically — what’s published so far there addresses who should seek medical clearance before sauna or cold plunge for cardiovascular and other conditions, a different question from whether EMF exposure at sauna-typical levels has a biological effect. Until a dedicated review exists, treat the EMF-hazard question as open rather than settled in either direction — here or anywhere else that claims to have closed it. A clinician, not a sauna buying guide, is the right party for a specific medical concern.
FAQ
What does “low-EMF” mean for an infrared sauna?
Nothing on its own — no regulator or industry body defines the term for saunas Convention. A meaningful claim needs a number, a stated distance, a stated body position, the field type (magnetic or electric), and a named third-party lab; without all five, “low-EMF” is a marketing label, not a measurement.
Is infrared sauna EMF safe?
This article covers exposure and measurement, not health effects — that’s a separate question it doesn’t resolve (see above). What’s measurable: independently verified premium units test well below ICNIRP’s general-purpose reference levels Vitatech Electromagnetics; ICNIRP 2010, while some brand claims elsewhere in the category go unverified. Whether exposure at any of these levels carries a biological effect isn’t something this article, or the site’s current coverage, settles in either direction.
What’s a normal EMF reading for an infrared sauna, in mG?
Third-party-verified premium units test in the low single digits or below — Sun Home’s independently tested figure is 0.5 mG at seated position Vitatech Electromagnetics, VTE-3534. For comparison, EPRI measured the average U.S. household ambient magnetic field at 0.9 mG, and a separate EPRI study measured average 24-hour personal exposure (home, work, and transit combined, not home-specific) at 1.25 mG EPRI, via Southern California Edison, and ICNIRP’s general-public reference level is 2,000 mG ICNIRP 2010 — a figure some sources incorrectly cite as 200 mG.
What’s the difference between magnetic and electric field EMF readings?
They’re different physical fields, measured with different instruments and reported in different units — magnetic in milligauss (mG), electric in volts per meter (V/m). A brand page that reports only one, almost always the magnetic figure, is telling you half the picture; a meaningful claim reports both separately.
Does ICNIRP have an EMF standard specifically for saunas?
No — ICNIRP’s guidelines are general-purpose exposure reference levels, not sauna-specific. Its actual 2010 reference for 50 Hz magnetic fields is 200 microtesla, which converts to 2,000 mG — not the 200 mG figure that circulates on some sauna and EMF sites ICNIRP 2010.