Is the Premier IS-1 full spectrum?

No. It is the far-only, no-frills entry with no separate near-infrared emitter, so in our scoring it is honest far-infrared rather than full spectrum. Choose it if verified low EMF, not near-infrared, is your priority.

What makes its EMF posture the benchmark in your scoring?

Clearlight publishes independent results below 0.8 mG at all positions, including the seat, and is the only brand here that markets cancelling both EMF and ELF. Because that figure is third-party and at the body, in our scoring it reaches the verified-at-seat tier the capped units cannot.

Infrared sauna · cabin

Clearlight Premier IS-1

Name: Clearlight Premier IS-1
Brand: Clearlight

The honesty benchmark for EMF in our scoring: Clearlight publishes a VitaTech lab report (which it commissioned, so not strictly independent) showing under 1 mG including at the seat, and uniquely addresses ELF too. The Premier is its far-only, no-frills entry that leads our EMF axis, though no third party we found has independently confirmed the figure.

By the RecoveryScored editorial team · Reviewed 2026-05-31

7.8

Strong

Composite (0-10), sauna-v1.0

Confidence: Verified

Bottom line

In our scoring, Clearlight Premier IS-1 earns 7.8 out of 10 (Strong). Its low EMF claim carries no milligauss figure verified at the seated position, so we found no independent measurement to stand on. It rates highest on heat & coverage (10.0/10). This is informational only, not medical advice.

Our take

Clearlight Premier IS-1 scores well overall, at 7.8 out of 10. It is strongest on Heat & Coverage (10.0/10).

By the numbers

Type: cabin (1-person)
Spectrum: far-infrared
Verified EMF: 0.8 mG, third-party at the body position
Heaters: 6 x carbon-ceramic hybrid (True Wave) + floor heater
Max temperature: 140 F
Wood: Basswood
Electrical-safety listing: ETL (Intertek), brand-stated
Warranty: lifetime
Price: $5,299

EMF of 0.8 mG is a figure verified at the body position. Source link pending verification.

Strengths

+ Verified EMF: 9.0/10
+ Heat & Coverage: 10.0/10
+ Safety & Build: 9.0/10

Watch-outs

No significant weaknesses flagged.

Who it is for

· Buyers who care about EMF and want a figure verified at the seat by a third party
· Buyers who want a fixed cabin with an electrical-safety listing

How it scored

Verified EMF

9.0/10 · 30%

A low magnetic-field (mG) figure measured at the seated body position by a named third-party lab. A figure measured at the heater, an unsourced number, or a bare low-EMF label is not a usable spec.

+5Third-party EMF at body position A0.8 mG, named lab at the seated position - A magnetic-field figure measured where you actually sit, backed by a named third-party lab. The only EMF number we treat as usable.
+4Ultra-low EMF (under 1 mG) A0.8 mG - Below the 1 mG ultra-low line at the body position.

Spectrum Honesty

6.0/10 · 20%

What the heaters actually deliver. Full spectrum is honest only with a separate near-infrared emitter, not a far-infrared panel relabeled.

+6Far-infrared (the most-studied band) Bfar-infrared carbon/ceramic - Far-infrared is the band behind most sauna sweat and cardiovascular research. Honest about what it is.

Heat & Coverage

10.0/10 · 15%

Heater count and placement that surround the body (including a floor or foot heater), and the temperature reached.

+4Surrounds the body B6 heaters - Six or more heaters across the walls give even coverage rather than one hot spot.
+3Floor or foot heater Bfloor heater - A floor or foot heater warms the hardest area to heat, a sign of real surround design.
+3Reaches full sauna temperature B140 F - Reaches the 140 F range expected of a cabin sauna.

Value

5.0/10 · 20%

Price against the median for its type (blanket, tent, or cabin).

+5Price vs class median A$5,299 (below class median) - Price scored against the median for its type. Class median about $5,500.

Safety & Build

9.0/10 · 15%

Electrical-safety listing (UL/ETL), recall history, warranty, and materials.

+5UL/ETL electrical-safety listed AETL/UL - Carries an electrical-safety listing, important for a high-wattage heater you sit beside.
+3Long warranty B99-year - Five-year or longer warranty.
+1Cabin wood disclosed CBasswood - The cabin wood is disclosed.

What to know before buying

· The honesty benchmark for EMF: Clearlight publishes independent results below 0.8 mG at all positions, and is the only brand marketing that it cancels both EMF and ELF.
· This is the far-only, no-frills entry; there is no near-infrared, so it is not full spectrum.
· Carbon-ceramic hybrid heaters across the walls with calf and floor coverage, and an ETL listing.
· Lifetime residential warranty, well above the category norm.
· If low EMF verified at the seat is your priority and you do not need near-infrared, this is the pick.

FAQ

Is the Premier IS-1 full spectrum?: No. It is the far-only, no-frills entry with no separate near-infrared emitter, so in our scoring it is honest far-infrared rather than full spectrum. Choose it if verified low EMF, not near-infrared, is your priority.
What makes its EMF posture the benchmark in your scoring?: Clearlight publishes independent results below 0.8 mG at all positions, including the seat, and is the only brand here that markets cancelling both EMF and ELF. Because that figure is third-party and at the body, in our scoring it reaches the verified-at-seat tier the capped units cannot.

Compared head-to-head

Last reviewed 2026-05-31. Scored under sauna-v1.0. See the methodology. Informational only, not medical advice.