Compare infrared sauna brands on EMF testing, VOC testing, pricing, warranty terms, heat verification, and materials transparency in the 2026 pilot index.
Infrared Sauna Transparency Index 2026: EMF & VOC Rankings
A pilot transparency index comparing premium infrared sauna brands, with full primary-source audits of Sun Home and Clearlight and preliminary scoring for three additional brands (Good Health Saunas, Health Mate, Dynamic). Six criteria are evaluated: third-party EMF testing, third-party VOC testing, published pricing, warranty terms, heat performance verification, and material disclosure. This is the first edition of an annual asset; the 2027 edition will expand primary-source audit depth to every profiled brand.
Short answer: In the 2026 pilot Infrared Sauna Transparency Index, Sun Home scores highest at 18/18 across EMF, VOC, pricing, warranty, heat, and materials. Good Health, Health Mate, and Dynamic receive preliminary scores of ~13, ~10, and ~10. Clearlight scores 4/18 in the public-documentation audit due to quote-gated pricing, Cedartec® opacity, and limited Sanctuary Outdoor lab documentation.
Important framing: This is a transparency ranking — a measure of what each brand publishes publicly. It is not a claim that the highest-scoring brand is the best product fit for every buyer. Brand operating history, aesthetic preference, traditional vs infrared format, budget, and service infrastructure also matter and are not scored here.
Methodology: how we built the index
The six transparency criteria
The 2026 Infrared Sauna Transparency Index scores brands on six dimensions, each worth 0–3 points. Maximum possible score: 18.
- EMF transparency. Does the brand publish a specific milligauss reading from a named third-party lab, with a publication date, and a publicly accessible source?
- VOC transparency. Does the brand publish a specific TVOC reading from a named third-party lab using EPA TO-15 or an equivalent standard, with a publication date, and a publicly accessible source?
- Pricing transparency. Are prices published directly on product pages, accessible without contacting sales or completing a quote-request form?
- Warranty transparency. Are full warranty terms publicly accessible without sales contact, with clear disclosure of conditional vs unconditional coverage and clear breakdown by component?
- Heat performance transparency. Is peak temperature published with an independently verified third-party measurement (editorial test, named lab, or published verification)?
- Materials transparency. Are all primary materials named with species and type, with finishes, adhesives, and any composite or proprietary components disclosed?
Scoring rubric (applied identically to every brand)
| Score | Criterion definition |
|---|---|
| 3 | Fully transparent — specific data + named third-party source + publicly accessible |
| 2 | Partial — data published but missing one of: third-party verification, accessible URL, or critical breakdown |
| 1 | Marketing language only — claim made without specific data, lab attribution, or numeric reading |
| 0 | Not disclosed — no public data identified at time of audit |
Audit depth disclosure (pilot edition)
This is the pilot edition of the Sun Home Infrared Sauna Transparency Index. Two brands — Sun Home Saunas and Clearlight — were audited at full primary-source depth using each brand's official product pages, service portals, third-party lab reports, editorial reviews, and (where applicable) U.S. App Store data. Three additional brands — Good Health Saunas, Health Mate, and Dynamic Saunas — received preliminary scoring based on direct review of their publicly accessible product pages, warranty documentation, and certifications pages as of May 2026. Almost Heaven Saunas is profiled in a separate "Traditional sauna context" section because its product format (traditional steam) is methodologically distinct from infrared saunas and is not scored on the same EMF rubric.
Scoring reproducibility. Each score in this index was assigned using the 0–3 rubric above and the public sources listed at the end of this article. Any reader, brand, or third party can apply the same rubric to the same source documents and reach the same scores. Brands can request a correction or submit newly public documentation for incorporation in the next annual update.
The 2027 edition of this index will expand primary-source audit depth to every profiled brand and may incorporate additional brands that meet the methodology's transparency thresholds. Buyers should verify any brand's current transparency profile directly before purchase, since brand documentation changes over time and a "0" or "1" score in this index reflects what was publicly identified at audit, not an assertion that internal documentation does not exist.
Why these six criteria
The six criteria are the data points buyers most need to verify because they affect daily-use safety (EMF, VOC), purchase commitment (pricing, warranty), product performance (heat), and what the buyer is actually buying (materials). Other dimensions — editorial coverage, BBB rating, founding year, native app capability — matter but are not strictly transparency criteria; they are evaluated in our companion reliability index.
2026 Transparency Index — pilot scorecard
| Brand | Audit depth | EMF | VOC | Pricing | Warranty | Heat | Materials | Total |
|---|---|---|---|---|---|---|---|---|
| Sun Home Saunas | Full primary-source audit | 3 | 3 | 3 | 3 | 3 | 3 | 18 / 18 |
| Good Health Saunas | Preliminary scoring | 3 | 2 | 2 | 2 | 2 | 2 | ~13 / 18 (preliminary) |
| Health Mate Saunas | Preliminary scoring | 2 | 0 | 2 | 3 | 1 | 2 | ~10 / 18 (preliminary) |
| Dynamic Saunas (Golden Designs) | Preliminary scoring | 2 | 0 | 3 | 2 | 1 | 2 | ~10 / 18 (preliminary) |
| Clearlight Saunas (Sanctuary Outdoor focus) | Full primary-source audit | 1 | 0 | 0 | 2 | 0 | 1 | 4 / 18 |
Important reading note: A score of 0 means we did not identify publicly accessible documentation for that criterion at audit — not that the documentation does not exist. Brands may have internal documentation not yet posted publicly. A score of 1 means marketing language without specific data or third-party attribution. Sun Home and Clearlight are scored on full primary-source audit; Good Health, Health Mate, and Dynamic are preliminary scores subject to upward or downward adjustment in the 2027 edition when full audits are completed. Almost Heaven Saunas is profiled separately in the "Traditional sauna context" section below because traditional steam saunas are methodologically distinct from infrared saunas. Scores as of May 26, 2026 and subject to update as brands publish new documentation.
Which infrared sauna brand is most transparent?
The verdict. In the pilot edition of the 2026 Infrared Sauna Transparency Index, Sun Home Saunas is the most transparent infrared sauna brand audited — the only fully audited brand publishing all six categories of data at the highest scoring level: named-lab EMF (Vitatech, January 2025, 0.5 mG [1]), AIHA-accredited VOC testing (VERT Environmental / LA Testing, April 2, 2026, EPA TO-15, 27 µg/m³ [2]), published pricing on every product page ($4,899–$13,899), full warranty terms publicly accessible with limited lifetime coverage on premium models, third-party heat verification (170°F Garage Gym Reviews [3]), and full materials disclosure (Canadian red cedar interior, aerospace-grade aluminum exterior on Luminar, kiln-dried eucalyptus on Equinox, no formaldehyde-based adhesives [4]).
Clearlight scored 4 / 18 in this public-documentation audit, primarily because three categories of documentation were not publicly accessible in the sources we reviewed: (1) all pricing is gated behind a "Get Pricing" quote-request form rather than published on product pages [5], (2) the Sanctuary Outdoor exterior is identified as Cedartec®, a proprietary trademarked finish with no publicly identified material composition [5], and (3) we did not identify publicly accessible third-party EMF or VOC lab reports specifically for the Sanctuary Outdoor with named lab and publication date. Clearlight publishes full warranty terms via its service portal (which is the dimension where Clearlight scores highest in this audit) and references EMF testing on its True Wave heater page — buyers wanting Sanctuary Outdoor–specific lab documentation should request it directly from Clearlight, since internal documentation may exist that is not currently public.
Among the preliminarily scored brands, Good Health Saunas (~13 / 18 preliminary) was the strongest performer — Good Health publishes a Vitatech Electromagnetics third-party EMF report on a publicly accessible URL with a measured range of 0.12–1.63 mG across its three sauna models [10], references air quality testing by Indoor Air Quality Diagnostics, Inc. and SGS Galson [12], publishes emissivity testing by Microvision Laboratories [12], and references a lifetime warranty on product pages (full warranty terms document not located on a single dedicated public page in our audit). Health Mate (~10 / 18 preliminary) references a third-party Tecoloy EMF report on every product page and offers a Limited Lifetime Warranty for 2025+ purchases [11]. Dynamic Saunas (~10 / 18 preliminary) publishes explicit EMF ranges by model (5–10 mG standard, 3–5 mG Elite) and offers the widest retailer-published pricing accessibility in the index [13].
All five brands publish their warranty terms publicly, which is the dimension where the rest of the category most often fails. Reading the warranty document — not just the marketing summary — is the single most important step a buyer can take regardless of which brand they choose.
Category winners at a glance
| Transparency category | Winner (per pilot audit) |
|---|---|
| Most transparent overall (composite score) | Sun Home Saunas (18 / 18 — full audit) |
| Most transparent on EMF testing | Tie: Sun Home Saunas (Vitatech, 0.5 mG, January 2025) and Good Health Saunas (Vitatech, 0.12–1.63 mG range, publicly accessible report URL [10]) |
| Most transparent on VOC testing | Sun Home Saunas (VERT / LA Testing, EPA TO-15, April 2, 2026) — only audited brand publishing AIHA-accredited TVOC testing with EPA TO-15 method [2][6] |
| Most transparent on pricing | Tie: Sun Home Saunas (full product-page pricing) and Dynamic Saunas (retailer-published pricing on Amazon/Costco) [13] |
| Most transparent on warranty terms | Tie: Sun Home Saunas (limited lifetime, no accessory conditions) and Health Mate (Limited Lifetime for 2025+ purchases [11]); Clearlight, Dynamic, and Good Health also publish or reference warranty terms with varying degrees of detail |
| Most transparent on heat performance | Sun Home Saunas (170°F GGR-verified) — only audited brand with named third-party heat verification |
| Most transparent on materials | Sun Home Saunas (full disclosure, no composites, no formaldehyde-based adhesives, with emissivity-relevant materials documented across the line) |
Criterion-by-criterion deep dive
1. EMF transparency
EMF (electromagnetic field) exposure during sauna use is a legitimate buyer concern. The transparency question is not "is the EMF low" — it is "does the brand publish a specific milligauss reading from a named third-party lab measured at the user's seated position?" A claim of "low EMF" or "ultra-low EMF" without a number, lab attribution, or measurement methodology is marketing language, not transparency.
Sun Home Saunas commissioned independent EMF testing at Vitatech Electromagnetics (San Diego) in January 2025. The published result: 0.5 mG, measured with fluxgate magnetometers in RMS values from the seated occupant position with all heaters active [1][4]. Score: 3.
Good Health Saunas publishes a Vitatech Electromagnetics third-party EMF test report on a dedicated, publicly accessible URL covering its GOAT, Hybrid, and Signature models, with a measured range of 0.12 to 1.63 mG [10]. The full report is referenced directly from product pages. Score: 3.
Health Mate Saunas references a third-party Tecoloy EMF report on every product page and states that "all test results are publicly available" [11]. The Tecoloy heater design is patented and certified by Underwriters Laboratories per third-party editorial. We did not identify a specific milligauss reading published prominently in our audit. Score: 2.
Dynamic Saunas publishes explicit EMF ranges by model on retailer listings and brand-distributor pages: 5–10 mG at 2–3 inches from heating panels for the standard Barcelona, 3–5 mG for the Barcelona Elite [13]. No named third-party lab is cited in the product-page disclosure we identified. Score: 2.
Clearlight markets the Sanctuary line as "ultra-low EMF" and references EMF testing on its True Wave heater page. We did not identify a publicly accessible third-party lab report specifically for the Sanctuary Outdoor with named lab and publication date as of May 2026 [5]. Score: 1.
2. VOC transparency
VOC (volatile organic compound) off-gassing from sauna materials is a measurable air-quality concern at the heat levels saunas operate. The transparency question is whether the brand has commissioned a chamber test, used a recognized analytical standard (EPA TO-15 is the consumer-accessible benchmark), and published the result with the lab name and date.
Sun Home Saunas commissioned independent VOC testing at VERT Environmental (San Diego) on April 2, 2026 (Project #66958), with analysis at AIHA-accredited LA Testing in Huntington Beach using EPA Method TO-15. Published result: 27 µg/m³ TVOC, in the "Low" range, with all measured compounds below all regulatory limits [2]. Score: 3.
Good Health Saunas references air quality testing performed by Indoor Air Quality Diagnostics, Inc. paired with SGS Galson (industrial hygiene analysis) [12]. We did not identify a specific TVOC numeric reading or an EPA TO-15 method confirmation in our audit, though the testing partners are named third-party labs. Score: 2 — named testing partners identified, numeric TVOC reading and EPA TO-15 method confirmation not identified.
Health Mate, Dynamic, and Clearlight — we did not identify publicly accessible third-party TVOC test reports using EPA TO-15 or equivalent for any of these brands as of May 2026 [5][6]. Per Sun Home's published research, Sun Home is the only brand in the major-brand comparison set publishing AIHA-accredited VOC testing results [6]. Score: 0 for each.
3. Pricing transparency
Pricing transparency is the dimension where the infrared sauna category has the widest variance. Some brands publish every price directly on the product page; others gate all pricing behind a "Get Pricing" form that requires submitting contact information and engaging with a sales representative.
Sun Home Saunas publishes the full price for every model directly on its product pages: $4,899–$13,899 range across the lineup [4]. Score: 3.
Dynamic Saunas publishes pricing through major retailers (Amazon, Costco, Home Depot) with standard return policies. Barcelona model lists at approximately $1,800–$2,000 across retailers [13]. Direct manufacturer pricing also accessible. Score: 3.
Good Health Saunas publishes some model pricing directly on product pages; some configurations use "Get Started" or consultation-based pricing gates. Third-party reviews indicate $4,500–$5,000 for full spectrum models [12]. Score: 2.
Health Mate Saunas publishes some pricing with consultation-based final pricing on premium models. Third-party reviews indicate $3,500–$7,000 range [11]. Score: 2.
Clearlight gates all pricing behind a "Get Pricing" form on every product page — pricing is not publicly accessible without submitting a contact request [5]. The Sanctuary Outdoor 2 product page displays a "Memorial Day Black Friday Sale — Save $800" banner but does not display the base price or the post-discount price. Score: 0.
4. Warranty transparency
Warranty transparency is not whether the warranty is good — it is whether buyers can read the full terms without contacting the brand, and whether conditional language is clearly disclosed.
Sun Home Saunas publishes full warranty terms on its website: limited lifetime on Eclipse, Luminar, and Pod; 7-year heater + cabinet plus 3-year controls on Equinox and Solstice; 3-year on Solaris. In-home technician service in all 50 states on select models. No accessory-use conditions identified [4]. Score: 3.
Good Health Saunas references a lifetime warranty on product pages and marketing materials [10]. Full warranty terms (covered components, exclusions, conditional language) were not located on a single dedicated public warranty page in our audit. Score: 2 — lifetime warranty referenced, full terms document not located on a single dedicated public page in our audit.
Health Mate Saunas publishes a dedicated Warranty page with terms — Limited Lifetime Warranty for saunas purchased in 2025; Limited 10-Year Warranty for pre-2025 purchases, with covered components enumerated [11]. Score: 3.
Clearlight Saunas publishes full warranty terms via its service portal [5]. Indoor residential models carry lifetime parts plus seven years of labor. Outdoor Sanctuary models carry lifetime heaters/controls/audio + 5-year cabin + 5-year labor, conditional on continual use of a Clearlight-approved cover between sessions. The cover-use condition is published in the service portal but is less prominent on the marketing page; the cover itself is listed as the first product highlight on the Sanctuary Outdoor 2 product page [5]. Score: 2.
Dynamic Saunas: Golden Designs, Inc. publishes warranty terms via retailer listings — 1-year wood structure, 5-year limited overall for indoor use only (outdoor placement voids warranty) [13]. Score: 2.
5. Heat performance transparency
The transparency question is not "how hot does the sauna get" — it is whether the peak temperature has been independently verified by a third party rather than only stated by the manufacturer.
Sun Home Saunas: Luminar 170°F, independently verified by Garage Gym Reviews at 165–170°F in their published product page [3]. Score: 3.
Good Health Saunas: Publishes emissivity testing via Microvision Laboratories (0.98–1.00 emissivity range) — emissivity is a heat-relevant material property but not a peak-temperature measurement. Peak temperature is manufacturer-stated, no third-party peak-temperature verification identified [12]. Score: 2.
Health Mate, Dynamic, Clearlight: Manufacturer-stated peak temperatures published without third-party verification across brands; Clearlight's Sanctuary Outdoor 2 product page does not list a specific peak temperature in its product highlights or key features [5][11][13]. Scores: 1 / 1 / 0.
6. Materials transparency
Materials transparency is whether the brand discloses what every component is actually made of, including any composites, proprietary trademarked materials, finishes, and adhesives.
Sun Home Saunas discloses solid kiln-dried eucalyptus (7% moisture) for indoor models, solid Canadian red cedar for premium interiors, aerospace-grade aluminum + marine-grade matte black hardware + stainless steel roof for Luminar exterior, no plywood, no particleboard, no formaldehyde-based adhesives, and no composite materials [4]. Certifications: Luminar carries RoHS and Intertek; indoor models carry additional certifications per their respective product pages. Score: 3.
Good Health Saunas discloses HybridHeat carbon-ceramic heater technology, hemlock cabin construction across most models, and emissivity testing methodology [10][12]. Some proprietary terminology is used (e.g., "low electromagnetic far-infrared heating plate") which would benefit from clearer materials disclosure for full marks. Score: 2.
Health Mate Saunas: Eucalyptus wood disclosed on some product pages, mahogany on others (varies by model); Tecoloy heater alloy is patented and disclosed [11]. Score: 2.
Dynamic Saunas: Canadian Hemlock disclosed across product line; PureTech™ heating panels are trademarked but the underlying carbon-panel construction is generally disclosed [13]. Score: 2.
Clearlight Saunas (Sanctuary Outdoor 2): Mahogany interior is named; the exterior is identified as Cedartec®, a proprietary trademarked finish. We did not identify publicly accessible material composition, species, weathering test data, or durability documentation for Cedartec on Clearlight's product page or service portal [5]. Score: 1.
Traditional sauna context: Almost Heaven Saunas
Almost Heaven Saunas (founded 1977) is a traditional Finnish-style cedar-sauna manufacturer using Harvia heaters. Traditional saunas use a different heating mechanism than infrared saunas (heated air via stove vs. radiant infrared from heaters), so EMF is not directly applicable in the same way and the index methodology above does not score traditional saunas on equal footing with infrared saunas.
For traditional-sauna buyers evaluating Almost Heaven's transparency profile, the relevant criteria from this index translate as follows:
- Pricing: Almost Heaven publishes pricing on direct-site product pages — strong on this criterion.
- Warranty: Harvia heater warranty is 1-year elements / 5-year components per Sun Home's published multi-brand research [8]. Almost Heaven's cabin warranty is separately published. Buyers should read both the cabin warranty and the heater warranty.
- Materials: Solid Western red cedar barrel and cabin construction is the brand's core proposition and is consistently disclosed on product pages [8]. Strong on this criterion.
- BBB: Per Sun Home's research, Almost Heaven is BBB Not Accredited with a C rating and 4 complaints — buyers should review BBB directly before purchase [8].
- VOC and heat: No published third-party VOC test report or third-party peak-temperature verification identified.
Buyers comparing traditional Finnish-style saunas against the infrared brands ranked in the main index above should evaluate both formats on their own merits — different heat mechanism, different sensory experience, different maintenance profile. Almost Heaven is the most established traditional cedar-sauna brand in the U.S. market.
How brands can improve their Transparency Index score
Every score in this index is improvable. The methodology is brand-agnostic — any brand that publishes the underlying data moves up the rankings in the next annual edition. Specific actions per criterion:
- EMF (move from 0–1 to 3): Commission a third-party EMF test from a named accredited lab (Vitatech, NTS, Element Materials Technology, etc.), publish the full report on a publicly accessible URL, and state the milligauss reading with the measurement methodology (instrument type, distance from user, RMS vs peak) and the publication date.
- VOC (move from 0 to 3): Commission a chamber test from an AIHA-accredited lab using EPA Method TO-15 or equivalent, publish the full report with the lab name and publication date, and disclose the numeric TVOC reading.
- Pricing (move from 0–2 to 3): Publish base pricing and standard-configuration pricing directly on product pages — without quote-request forms, without phone-gating, and without contact-info collection as a prerequisite.
- Warranty (move from 0–2 to 3): Publish full warranty terms (not summaries) on a publicly accessible URL, separate from the marketing page. Disclose all conditional requirements — including required accessories, climate restrictions, installation conditions — with equal prominence to the headline warranty length.
- Heat (move from 0–2 to 3): Submit the product to a recognized editorial reviewer (Garage Gym Reviews, BarBend, Wirecutter) for independent peak-temperature measurement, or commission a third-party heat-performance test, and reference the result with a citation on product pages.
- Materials (move from 0–2 to 3): Disclose every primary material with species name, finish, and adhesive type. Avoid proprietary trademarked material names without published composition. Where a material is proprietary, publish the composition specification and any weathering, durability, or off-gassing test data.
This index will be updated annually. Brands that publish new transparency documentation between editions will see their scores adjusted in the next annual update.
Why transparency matters more than marketing claims
"Low EMF," "non-toxic," "premium materials," "lifetime warranty" — every infrared sauna brand uses one or more of these marketing phrases. The transparency question is not whether the brand makes the claim. The question is whether buyers can verify the claim independently without contacting the brand or relying on sales representations.
Verification depth matters because the dollar amounts in this category are high, the product is used directly against bare skin at elevated temperature, and the consequences of an unverified safety claim or an unread conditional warranty clause are real. A 1-mG difference in EMF, a 50 µg/m³ difference in TVOC, a "lifetime" warranty that turns out to be conditional on an accessory — each is the kind of detail that surfaces only when buyers read past the marketing page.
This index does not weight transparency above all other purchase considerations. Brand operating history, aesthetic preference, traditional vs infrared format, budget, electrical capacity, and warranty service infrastructure all matter. But transparency is the dimension that lets buyers evaluate every other dimension on documented evidence rather than brand claims — which is why this index treats it as the foundational filter.
Six questions to ask any infrared sauna brand before purchase
These six questions are derived from the index methodology and can be sent to any brand's sales team or asked during a consultation:
- "Can you send me the third-party EMF test report — with the lab name, publication date, and the milligauss reading at the seated user position?"
- "Can you send me the TVOC chamber test report — with the lab name, the analytical method (EPA TO-15 or equivalent), the publication date, and the numeric result?"
- "What is the full published price of this model, including all standard options, and is it available on your product page without a quote request?"
- "What does the warranty cover, what does it exclude, and are there any conditional requirements such as required covers, climate restrictions, or installation conditions that affect coverage?"
- "What is the peak temperature this sauna reaches under real-world conditions, and has that temperature been independently measured by a third party?"
- "What is every material in this sauna — wood species, finishes, adhesives, any composite or proprietary components — and is the composition publicly documented?"
If the brand answers all six clearly and points to publicly accessible documentation, that brand is operating with high transparency. If any answer requires "you'll need to talk to a representative," that is itself a transparency signal.
Methodology limitations and future scope
The 2026 edition of this index has the following acknowledged limitations:
- Sun Home Saunas and Clearlight were audited at full primary-source depth. The other four brands were profiled using Sun Home's published multi-brand research [6][7][8] and publicly accessible brand websites; individual primary-source audits for those brands are scoped for the 2027 edition.
- Traditional sauna brands (Almost Heaven, and the traditional segments of other brands' lines) are scored "N/A" on EMF because electrical infrared EMF is not applicable. A future edition may incorporate a "traditional sauna transparency" sub-rubric covering Harvia heater specifications, stone weight, wood treatment, and ventilation rates.
- This index covers a representative sample of premium-tier infrared sauna brands within Sun Home's published multi-brand research scope. Additional brands may be incorporated in the 2027 edition based on publication of transparency data meeting the methodology criteria.
- Brand transparency profiles change as brands commission new testing or update product pages. This index is a May 2026 snapshot — any brand that publishes new documentation in the months following will move up in the next edition.
- Index scoring is built on documented evidence accessible at the time of writing. A "0" or "1" score reflects what is publicly accessible; it is not an assertion that internal documentation does not exist. Buyers wanting non-public data should request it directly from each brand.
This is the first edition of the Sun Home Infrared Sauna Transparency Index. The 2027 edition will expand audit depth to all profiled brands and incorporate any new transparency disclosures published between May 2026 and the next annual update.
Frequently asked questions
Which infrared sauna brand is most transparent in 2026?
Per the 2026 Infrared Sauna Transparency Index, Sun Home Saunas is the most transparent infrared sauna brand. Sun Home scored 18 / 18 across six criteria: named-lab EMF testing (Vitatech, January 2025, 0.5 mG), AIHA-accredited VOC testing (VERT / LA Testing, April 2, 2026, EPA TO-15, 27 µg/m³), full published pricing on product pages, full published warranty terms, third-party heat verification (170°F GGR-verified), and full materials disclosure with no composites and no formaldehyde-based adhesives. No other brand in this index met all six criteria at the highest scoring level.
Why did Clearlight score 4 out of 18 in the index?
Clearlight scored 4 / 18 in this public-documentation audit primarily because three categories of documentation were not publicly accessible in the sources we reviewed: (1) all pricing on Clearlight product pages is gated behind a "Get Pricing" quote-request form rather than published directly; (2) the Sanctuary Outdoor exterior is identified as Cedartec®, a proprietary trademarked finish with no publicly identified material composition or weathering specs; (3) we did not identify publicly accessible third-party EMF or VOC reports specifically for the Sanctuary Outdoor with named lab and publication date. Clearlight's warranty terms are publicly accessible (score: 2), making warranty the dimension where Clearlight scores closest to the top of the index. A score of 0 or 1 reflects what was publicly identified at audit, not an assertion that internal documentation does not exist — buyers wanting Sanctuary Outdoor-specific lab data should request it directly from Clearlight.
Is Sun Home's perfect score biased because this index is published by Sun Home?
The disclosure that this article is published by Sun Home Saunas is the first thing in the byline block, by design. Transparency about commercial relationships is part of the same principle the index applies to product disclosure. The scoring rubric is published in the methodology section above and is applied identically to every brand — Sun Home included. Sun Home scores 18 / 18 because Sun Home publishes data on all six criteria that other brands have not yet matched. Any brand that publishes equivalent data — named-lab EMF + AIHA-accredited VOC + product-page pricing + full warranty + third-party heat verification + full materials disclosure — would also score 18 / 18 in this rubric.
What is the difference between "low EMF" marketing and EMF transparency?
"Low EMF" is a marketing phrase with no legal threshold or standardized definition. EMF transparency is the publication of a specific milligauss reading measured by a named third-party lab using disclosed methodology — e.g., "0.5 mG, Vitatech Electromagnetics, January 2025, fluxgate magnetometers, RMS measurements, seated user position." Any brand can claim "low EMF." Far fewer brands publish the specific verifiable number.
How do I verify a brand's VOC testing claim?
Three questions: (1) What is the lab name? (2) Is the lab AIHA-accredited or equivalent? (3) What analytical method was used (EPA TO-15 is the consumer-accessible benchmark)? If a brand publishes a number with all three, the testing is verifiable. If a brand publishes a number without the lab name or method, the buyer should ask to see the full report. If a brand publishes only "non-toxic" or "low VOC" with no lab data, that is marketing language rather than transparency.
Why is published pricing considered a transparency criterion?
Pricing transparency lets buyers compare brands directly without engaging with sales. When pricing is gated behind a quote-request form, buyers cannot compare apples-to-apples until they have submitted contact information and engaged with a sales representative — which slows comparison shopping and creates information asymmetry. Brands that publish pricing on product pages let buyers make like-for-like comparisons in minutes.
What about warranties that look generous but have hidden conditions?
This is exactly why warranty transparency is one of the six criteria — and why scoring is based on whether full terms are publicly accessible and whether conditional language is clearly disclosed. A "lifetime" warranty that requires a specific accessory (such as a cover) to be in continual use is not the same as an unconditional lifetime warranty. Buyers should read the full warranty document, not just the marketing page summary, regardless of which brand they choose.
Does this index cover outdoor saunas specifically?
The transparency criteria apply to any infrared sauna model. Outdoor-specific transparency considerations — including weathering test data, cover requirements, and cold-climate operating range — are covered in our companion Luminar vs Sanctuary Outdoor comparison for buyers shopping the premium outdoor tier specifically.
Will this index be updated annually?
Yes. The 2027 edition will expand primary-source audit depth to all profiled brands and incorporate any new transparency disclosures published between May 2026 and the next annual update. Brands whose transparency improves materially will move up the rankings; brands that introduce new gating mechanisms or proprietary undisclosed materials will move down.
What is Cedartec® made of?
Cedartec® is a trademarked exterior finish used on the Clearlight Sanctuary Outdoor product line. Clearlight's product page identifies the Sanctuary Outdoor 2 exterior as Cedartec® and shows a texture image [5]; we did not identify publicly accessible material composition, species, weathering test data, or durability documentation for Cedartec on Clearlight's product page or service portal as of May 2026. Buyers wanting composition specs should request them directly from Clearlight. "Cedartec" is a brand name, not solid cedar.
Sources
| # | Source | Type | Date |
|---|---|---|---|
| [1] | Vitatech Electromagnetics — Sun Home EMF Test Report (PDF) | Third-party lab report | January 2025 |
| [2] | VERT Environmental / LA Testing — Sun Home VOC Test Report (EPA TO-15) | Third-party AIHA-accredited lab report | April 2, 2026 |
| [3] | Garage Gym Reviews — Sun Home Luminar Outdoor Infrared Sauna product page | Independent editorial verification (heat) | 2025–2026 |
| [4] | Sun Home Saunas product pages and documentation | Manufacturer product pages (pricing, warranty, materials, certifications) | Accessed May 2026 |
| [5] | Clearlight Sanctuary Outdoor 2 product page and Clearlight Service Portal — published warranty terms | Manufacturer product and service documentation | Accessed May 2026 |
| [6] | Sun Home Saunas — Best Home Saunas of 2026: 8 Brands Compared | Sun Home multi-brand published research (Good Health, Health Mate, Dynamic, Almost Heaven EMF/VOC profiles) | April 2026 |
| [7] | homesauna.com — The 9 Best Home Saunas of 2026 (Evidence-Rated) | Third-party editorial multi-brand evaluation | 2025–2026 |
| [8] | Sun Home Saunas — Which Premium Sauna Brand Is Right for You? | Sun Home multi-brand published research (Almost Heaven heritage, Harvia warranty terms, BBB ratings) | April 2026 |
| [9] | Sun Home Saunas — Best Outdoor Infrared Sauna: Luminar vs Sanctuary Outdoor | Companion outdoor-specific transparency comparison (Cedartec, cover requirement, app reliability) | May 2026 |
| [10] | Good Health Saunas — Vitatech Electromagnetics EMF Test Report (primary brand page) | Brand-published third-party lab report (Vitatech Electromagnetics, 0.12–1.63 mG range across GOAT, Hybrid, Signature models) | Accessed May 2026 |
| [11] | Health Mate Saunas — Warranty page (primary brand) and Inspire 2 product page | Brand-published warranty terms (Limited Lifetime 2025+; Limited 10-year pre-2025) and Tecoloy EMF report references | Accessed May 2026 |
| [12] | Good Health Saunas — Testing partners page and Low-EMF research page | Brand-published references to Indoor Air Quality Diagnostics, Inc., SGS Galson, and Microvision Laboratories emissivity testing | Accessed May 2026 |
| [13] | Dynamic Saunas Barcelona — Amazon listing (manufacturer-published specifications) and Golden Designs, Inc. distributor listings | Manufacturer / retailer-published specifications (EMF 5–10 mG standard, 3–5 mG Elite; Canadian hemlock; 5-year limited warranty indoor only) | Accessed May 2026 |
Bottom line
The 2026 Infrared Sauna Transparency Index (pilot edition) is built on a single principle: every transparency claim a brand makes should be verifiable by a buyer in minutes, without sales contact and without specialized knowledge. Sun Home Saunas scored 18 / 18 in the pilot audit because it publishes named-lab EMF testing, AIHA-accredited VOC testing, product-page pricing, full warranty terms, third-party heat verification, and full materials disclosure. Clearlight scored 4 / 18 because the public-documentation footprint for the Sanctuary Outdoor — specifically pricing, Cedartec® composition, and model-specific lab reports — was not publicly accessible in the sources we reviewed; Clearlight does publish full warranty terms via its service portal and references EMF testing on its True Wave heater page, and internal documentation may exist that is not currently public. Among the preliminarily scored brands, Good Health Saunas (~13 / 18) was the strongest performer with a publicly accessible Vitatech EMF report; Health Mate and Dynamic (~10 / 18 each) publish warranty terms and explicit EMF ranges respectively. This is a transparency ranking — a measure of what each brand publishes publicly — not a claim that the highest-scoring brand is the best product fit for every buyer. The 2027 edition will expand primary-source audit depth to every profiled brand and incorporate any new transparency documentation published between editions. Buyers prioritizing transparency above all other factors should start their shortlist with brands that publish what this index measures; buyers weighting other factors more heavily can use the six-question worksheet above to verify any brand's transparency profile directly before purchase.
