The Peak Fuji Evidence Audit: 8 Marketing Claims, Checked Against Peak's Own Pages (2026)

Short answer

Peak's Fuji product page has improved since our July audit, and the verification gap behind its headline claims has not closed. When reverified on September 1, 2026, the Peak Fuji was listed at $8,250 before an additional $300 checkout promotion; Peak lists a regular sauna price of $9,995. Of the eight claims we track, two changed for the better: the five uncited health statistics are gone, replaced by named Finnish cohort studies with a stated limitation, and the Finnish research is now framed accurately in the main health section, though a lower comparison module still pairs it with the Fuji's 150°F specification. The other six findings stand. "Lifetime warranty" is still defined as 7 years on heaters and cabinetry with labor excluded, and the component table now sits on a separate warranty page rather than the product page. The 150°F maximum has a published warm-up estimate but no independent test. "Medical-grade" has no regulatory definition and no verification report. The EMF claim exists in three inconsistent versions with no named laboratory. No UL, ETL, or CSA mark or file number appears on the product page, in the owner's manual, or on the manuals page. The ionizer has no published ozone data or certification status.

Sources: Peak Fuji product page [1], Peak brand warranty page [2], and the Everest and Fuji owner's manual [4], all read in full on September 1, 2026. Each claim below carries its own citations.

The eight claims at a glance

How this audit works

This is not a hands-on review. We have not tested a Fuji, and nothing below should be read as a measurement of one. What this audit does is take the specific, checkable claims Peak publishes about the Fuji and compare each one against the evidence Peak itself makes available, then against public directories and the primary research Peak cites. Where a claim checks out, we say so. Where the documentation is absent, we describe what is missing and what a buyer should request in writing. We do not assume the worst, and a finding of "not documented" is never a finding of "false."

Date of this version

September 1, 2026. The original research was done on July 17, 2026 and re-verified on July 19, 2026.

Peak documents read in full on September 1, 2026

The Fuji product page, including its specification table, warranty accordion, health section, comparison module, FAQ, review feed and Peak's replies to reviewers [1]; the brand warranty page the product page links [2]; the 7-Year Limited Residential Warranty page [3]; the Everest and Fuji owner's manual, version 2, listed as last updated August 19, 2026 [4] [5]; the EMF information page, updated August 31, 2026 [6]; the 2026 buyer's guide [7]; and the Peak help center articles on heat-up time, EMF and warranty terms [8].

Outside sources

The PubMed and publisher records for the two Finnish cohort studies Peak cites [9] [10]; the U.S. EPA's guidance on ionizers and ozone [11]; the California Air Resources Board's air-cleaner regulation and certified-devices list [12] [13]; and the public certification directories of Intertek, UL Solutions and CSA Group [14] [15] [16].

What would change a finding

A named laboratory report with method and numeric results would close the EMF finding. An instrumented measurement by a party independent of Peak would close the temperature finding. A certification body and file number would close the certification finding. Ozone-emission data or a certification listing would close the ionizer finding. A third-party spectral report would close the red-light finding. We will update this page when any of them appears.

Limits

Manufacturer pages change without notice; every figure here is a dated snapshot. Our July 17 directory searches under the retail brand name were not repeated on September 1. We did not open the Fuji CAD drawing. Prices are quoted as displayed on the product page on the date stated and will change.

The eight claims, one by one

1. "Limited lifetime warranty"

Peak's wording on September 1, 2026: "Limited lifetime warranty + lifetime U.S.-based support" in the included-features list; "Every Peak sauna carries a limited lifetime warranty on the cabin, heaters, and electronics" and "Red-light panel: 1 year" in the warranty accordion; and, in the comparison module, "Every component covered for life" with a table cell reading "Lifetime, all components" [1].

What we found. The component table is no longer on the product page. It now lives on Peak's separate brand warranty page, which the product page links, and in Section 13 of the owner's manual [2] [4]. The terms themselves are unchanged and clearly published: "lifetime" is defined as the expected life of the component, 7 years for residential use; heating elements and cabinetry carry that 7-year term, the control system and power supply 3 years, and chromotherapy lighting, the red-light panel, the sound system, accessories and WiFi connectivity 1 year each. Labor and technician fees are excluded, freight for replacement parts is excluded after 90 days, weather and water damage are excluded, the warranty is non-transferable, and the product "must be used in a residential indoor setting unless explicitly approved" [2]. Peak's longer 7-Year Limited Residential Warranty, published on a second web page and reproduced in the manual, adds an installation deadline of six months, conditions coverage on a dedicated circuit, and includes one first-year technician visit for diagnosis only, capped at $350, with repair labor still excluded [3] [4]. That visit does not appear on the brand warranty page the product page links.

One term now conflicts across Peak's own documents. The red-light panel is covered for 1 year on the product page and on both warranty web pages, 3 years in the owner's manual, 2 years in a help center article, and 7 years on Peak's "why buyers trust" page, its 2026 warranty blog post and its standalone panel product page [1] [3] [4] [8] [17] [18] [19]. We do not know which term Peak would honor, and neither does a buyer reading the site. "Lifetime, all components" and "3 years" on the control system remain on the same page; the terms table, not the banner, is what a claim will be judged against.

How to treat this claim: a published 7-year, 3-year, 1-year parts warranty with labor excluded, sold under a lifetime headline. Ask Peak in writing which red-light panel term governs your order.

Deep dive: Peak Saunas lifetime warranty explained: Fuji coverage and exclusions

2. "150°F max"

Peak's wording on September 1, 2026: "150°F max" in the feature block, "a real max of 150°F" in the overview, "Max 150°F+" and "Reaches 150°F" in the feature list, "Up to 150°F" in the specification table, and "150°F Max Temperature" in the comparison module [1]. The "a true 150°F" phrasing we quoted in July is gone.

What we found. The 150°F figure is manufacturer-stated, and Peak now publishes a warm-up estimate that it did not publish in July: its help center says indoor models reach 140°F in about 30 to 40 minutes and 150°F in about 45 to 60 minutes from a 65°F to 72°F room, with 10 to 15 minutes added in a cold space [8]. None of the five formulations on the product page states where the temperature is measured, at what setting, after how long or in what room conditions. The owner's manual publishes no maximum temperature and no warm-up time; it describes a single temperature sensor with no stated location and an overheat lock that trips above 167°F [4]. Owner reviews hosted on Peak's storefront describe cabins heating quickly and, for some models, exceeding stated temperatures; none reports an instrument, a probe position, a starting temperature or an elapsed time [1]. We located no independent instrumented test of a Fuji as of September 1, 2026. The search method is recorded on the temperature page.

How to treat this claim: manufacturer-supported and plausible, with an overheat cutoff well above 150°F and a published warm-up estimate, but not independently verified.

Deep dive: Does the Peak Fuji reach 150°F? Evidence review

3. "Medical-grade red light therapy"

Peak's wording on September 1, 2026: "Full-body medical-grade red light" and "Real therapy, not decorative LEDs" in the feature copy; a specification row listing one 9 by 36 inch front-wall panel with 216 dual-chip LEDs, a 30 degree beam angle, eight wavelengths (630, 650, 660, 670, 810, 830, 850 and 1,060 nm) and irradiance of 175 mW/cm² at 6 inches, 107 at 12 inches and 80 at 24 inches; and a FAQ answer describing "the same standard used in clinical treatments" [1].

What we found. Credit first: publishing irradiance at three defined distances is better dose disclosure than most of the category provides, and the specification is unchanged since July. Two gaps also remain unchanged. "Medical-grade" has no regulatory definition, and Peak claims no FDA clearance or approval for the panel on the pages reviewed. And we found no published third-party report confirming the panel's wavelength output or irradiance. A Fuji owner's review still displayed on the product page on September 1 reports asking Peak for a wavelength verification report and being told none was available; Peak's public reply does not address the report [1]. The owner's manual adds detail the product page omits: the panel is controlled through a separate Peak Saunas app that, per the manual, cannot control the panel remotely, and the app offers pre-programmed modes for skin, muscle recovery, sleep, fat loss, joint pain, pets and a universal setting, with no dose or evidence stated for any of them [4]. Peak's reply to another owner confirms the panel switches off once the cabin passes its maximum temperature, which is single-sensor thermostat behavior [1]. The panel's warranty term is the conflict described under claim 1.

How to treat this claim: detailed manufacturer specifications, published; the "medical-grade" label and any third-party measurement, not established by evidence currently shown.

Deep dive: What "medical-grade red light" does and does not mean on the Fuji

4. The five health statistics

Peak's wording on September 1, 2026: a health section headed "What the research actually shows" that cites 40% lower all-cause mortality and 50% lower fatal cardiovascular disease among the most frequent sauna users (Laukkanen et al., JAMA Internal Medicine, 2015), a 65% lower rate of Alzheimer's disease and dementia (Age and Ageing, 2017), and lower incidence of hypertension (American Journal of Hypertension, 2017), followed by: "It studied sauna bathing generally, largely traditional Finnish saunas, so it is evidence about the habit, not about any one brand," and a note that Peak saunas "are wellness products, not medical devices" [1].

What we found. This claim is resolved. Earlier versions of the Fuji page contained five uncited health statistics: detoxification "up to 20% more" than traditional saunas, heart-disease risk reduced "by 46%" per "a study published in JAMA," chronic pain relief for "70%" of patients, "a 26% reduction in wrinkles," and "83%" of users sleeping better. Those statistics were no longer present when we rechecked the page on September 1, 2026. Peak replaced them with named longitudinal sauna studies and added appropriate limitations about their applicability. The figures Peak now quotes match the published papers: the 2015 cohort reported hazard ratios of 0.60 for all-cause mortality and 0.50 for fatal cardiovascular disease for men bathing 4 to 7 times a week versus once a week, and the 2017 follow-up reported 0.35 for Alzheimer's disease and 0.34 for dementia in the same comparison [9] [10]. These are observational associations in a cohort of middle-aged Finnish men who used traditional saunas, which Peak now says.

Archived July 2026 finding, kept for the record: on July 17 and July 19, 2026, none of the five statistics then on the page carried an author, year, journal reference or link, except the phrase "a study published in JAMA" attached to the 46% figure. Our health-claims page, written against that version, remains online as the statistic-by-statistic record and is being updated to reflect the current page.

How to treat this claim: corrected. The current health section is the standard we would like to see across the category.

Deep dive: Fact-checking the Fuji page's health claims, statistic by statistic

5. The Finnish longevity research

Peak's wording on September 1, 2026: two placements. The main health section, quoted above, frames the research as evidence about the habit rather than the product. Lower on the page, the "Peak Difference" comparison module lists "150°F Max Temperature" with the caption "Clinically meaningful heat. Laukkanen 2018: 4x/week sessions = 40% reduction in all-cause mortality" [1]. A banner at the top of the page also displays figures of 50% lower cardiovascular mortality, 65% lower Alzheimer's risk and 40% lower all-cause mortality directly above the Fuji's price.

What we found. Peak has substantially corrected its main research section by explaining that the Finnish studies examined general sauna habits, largely traditional sauna, rather than this product. However, its lower comparison module still places the mortality finding beside the Fuji's 150°F specification in a way that can imply product-specific applicability, and it dates the finding to 2018 when the mortality paper was published in 2015 [9]. The cohort in that paper used traditional Finnish saunas, typically operated near 79°C, or about 174°F, and the study did not examine 150°F infrared cabins [9]. The page is therefore improved but internally inconsistent: the section a careful reader finds says one thing, and the module built for scanning says another.

How to treat this claim: the research is real and now accurately described in one place on the page; the "clinically meaningful heat" pairing in the comparison module remains an interpretation, not a study finding.

Deep dive: What the Finnish sauna studies actually measured, and what they did not

6. Safety certification (UL, ETL, CSA)

The context on September 1, 2026: the product page specifies 120V, 20A, 2,050W on a dedicated 20A circuit with a NEMA 5-20P plug, and the owner's manual repeats those figures and adds that the sauna "is not compatible with GFCI outlets or breakers" and that owners should not install a GFCI outlet even where local code requires one [1] [4]. The cabin contains carbon heater panels, halogen and quartz emitters, a 216-LED light panel, two speakers, WiFi electronics and an ionizer.

What we found. As of September 1, 2026, we could not locate a UL, ETL or CSA certification mark, a listing or file number, or the name of any nationally recognized testing laboratory (NRTL) anywhere in the text of the product page, in the 35-page owner's manual, or on the manuals page [1] [4] [5]. The manual has a full electrical-requirements section and a full warranty section and names no certification body in either. Our July 17, 2026 searches of the Intertek, UL Product iQ and CSA Group directories under the retail brand name did not return a listing we could match to the Fuji; those searches were not repeated on September 1 [14] [15] [16]. We deliberately say "not prominently documented" rather than "not certified": listings are registered under applicant company names, which are often a manufacturer or corporate entity rather than a retail brand, and a mark may appear on the unit's nameplate. The definitive answer is a file number. The GFCI instruction is a separate matter for your electrician and inspector, since receptacle requirements vary by jurisdiction and by where in the home the sauna is installed.

How to treat this claim: safety certification not prominently documented on any Peak page or document we could read; request the certifying body and file number in writing before installation and check it in the public directory.

Deep dive: Is the Peak Fuji UL, ETL or CSA certified? How to find out

7. "Near-zero" and low EMF

Peak's wording on September 1, 2026, in three current sources. The EMF information page, updated August 31, 2026: "All Peak saunas test low EMF at body distance," with the note that there is "no meaningful difference between 'low EMF,' 'ultra-low EMF,' and 'near-zero EMF'" [6]. The 2026 buyer's guide: "Verified low-EMF under 2mg at sitting position with dedicated shielding on all components" [7]. The Fuji product page: an "About Peak Saunas" block promising "near-zero EMF," a URL containing "near-zero-emf," and an EMF section stating that fear-based EMF marketing "is not supported by scientific evidence, and that includes ours: we won't use it" [1]. A help center article gives a figure of about 3 mG [8].

What we found. The product page's "Ultra-low" specification row and "ultra-low-EMF construction throughout" line from July are gone, and the rewritten EMF page is candid that tier labels are marketing. What remains is three descriptions that do not agree and none that a buyer can check. The EMF page gives a qualitative statement with no number, laboratory, instrument, method or report. The buyer's guide gives a threshold and a position, "under 2mg at sitting position," but the unit is presumably milligauss, not milligrams, and the guide does not identify who verified it. The URL and brand copy continue to say "near-zero." The help center's roughly 3 mG figure would sit above the buyer's guide's threshold. None of these figures is alarming; low single-digit milligauss readings are ordinary for appliances. The point is that "verified" appears without a verifier, and a Fuji-specific report with measurement positions has not been published anywhere we could find.

How to treat this claim: a low-EMF design is plausible and is standard engineering, as Peak itself says; a named-laboratory report with numeric results at stated positions is the documentation to ask for.

8. The "smart oxygen-ionization" system

Peak's wording on September 1, 2026: "a smart oxygen-ionization system that freshens the air during and after each session" in the feature copy, and "Smart oxygen-ionization (Active + Purify modes)" in the specification table [1].

What we found. Peak publishes no output specification for the ionizer: no ozone-emission figure, no certification status, and no explanation of what "Active" and "Purify" modes do differently. The owner's manual mentions the "Oxygen Ionizer" three times, as an included accessory, in an installation step that mounts it at the upper left of the back panel, and in the warranty table as an accessory covered for 1 year; it contains no operating instructions or mode description for it [4]. Peak's reply to a Fuji owner's review acknowledges feedback on the "ionizer instructions" [1]. Why the gap matters: the U.S. EPA states that ion generators can produce ozone, a lung irritant, indirectly [11], and this device operates inside a small enclosed cabin you sit in. California regulates indoor air cleaning devices sold into the state, places ionizers in its "Electronic" category with an ozone-emission limit of 0.050 ppm, and publishes a list of certified devices [12] [13]. Whether a sauna-integrated ionizer falls within that regulation is a question for Peak and CARB; Peak's pages and manual do not state a CARB certification, and a buyer can check the public list for any listing Peak names.

How to treat this claim: a feature with no published performance or safety data; ask Peak for the ionizer's ozone-emission data and certification status in writing, and consider leaving it switched off until you have them.

What Peak documents well

An honest audit cuts both ways, and the September 1 pages deserve more credit than the July pages did. Peak publishes a transparent price, $8,250 on the product page when reverified on September 1, 2026, with a stated regular price of $9,995, rather than a quote form; the one caveat is that Peak's own buyer's guide still shows the Fuji at $8,450 and a $5,998 promotional block on the same site, so the product page is the figure to rely on [1] [7]. The full warranty component table is published on a linked page and reproduced in the manual, and the warranty registers automatically on ordering [2] [4]. The red-light panel's dose disclosure, irradiance at three defined distances, is better specification than much of the premium tier provides [1]. The published electrical requirement is specific enough for an electrician to act on and is repeated in the manual [4]. Remote preheat and scheduling are real, though the manual routes sauna control through the third-party Smart Life app while the product page attributes it to the Peak Saunas app, which runs the light panel; that is a documentation gap, not a missing feature [4]. The health section now cites named studies, states their limits and carries a not-a-medical-device statement. And Peak publishes critical reviews on its own product page, including the ones that surface the documentation gaps described above, and answers them in public [1].

The pattern, and what to ask before buying

Across the eight claims the pattern from July is narrower but intact: the Fuji's specifications are published in unusual detail, and the verification behind the headline adjectives, "lifetime," "real," "medical-grade," "verified," "near-zero," is not. Two of the eight findings closed because Peak edited its page, which is exactly how this kind of audit is supposed to work. None of this means the remaining claims are false. It means that, as published, they rest on Peak's word rather than on documents a buyer can read. Before purchasing, we suggest requesting the following from Peak in writing: the safety certification body and file number for the complete cabin; the named laboratory, method and numeric results behind the EMF claim; a third-party wavelength and irradiance report for the red-light panel; the ionizer's ozone-emission data and certification status; and the warranty term Peak will honor on the red-light panel, since its documents say 1, 2, 3 and 7 years. A manufacturer confident in its claims should be able to answer all five in one reply.

The full audit series

For how we grade the brand as a whole, see our Peak Saunas report card.

Frequently asked questions

Is the Peak Fuji a bad sauna?

That is not what this audit found or claims. The Fuji is a well-featured two-person cedar sauna with a published price, detailed specifications, remote preheat, and strongly positive owner reviews on Peak's own storefront. What this audit found, as of September 1, 2026, is a gap between several headline adjectives and the published verification behind them, and two claims Peak has since corrected. Whether the remaining gap matters is a judgment each buyer should make, ideally after requesting the missing documents in writing.

Does the Peak Fuji really have a lifetime warranty?

Not in the everyday sense of the word. Peak's published terms define "lifetime" as the expected component life of 7 years for residential use. Heating elements and cabinetry carry that 7-year term; the control system and power supply carry 3 years; chromotherapy lighting, the sound system, accessories and WiFi connectivity carry 1 year. Labor is excluded, freight for replacement parts is excluded after the first 90 days, and weather and water damage are excluded. The red-light panel is listed at 1 year on Peak's warranty web pages, 2 years in a help center article, 3 years in the owner's manual and 7 years in Peak's blog and trust pages, so ask Peak in writing which term applies to your order.

Is the Peak Fuji's low-EMF claim independently verified?

Not by any document we could find as of September 1, 2026. Peak's EMF page, updated August 31, 2026, says all Peak saunas "test low EMF at body distance" and gives no number, laboratory, instrument, method or report. Peak's buyer's guide says "verified low-EMF under 2mg at sitting position" without naming the verifier, a help center article gives about 3 mG, and the Fuji's URL and brand copy say "near-zero EMF." These are not alarming figures, but they disagree with each other, and "verified" without a verifier is not documentation a buyer can check.

Is the Peak Fuji UL, ETL or CSA certified?

We could not locate a certification mark, listing number or named testing laboratory anywhere in the Fuji product page, the owner's manual or Peak's manuals page as of September 1, 2026, and our July 17, 2026 searches of the public Intertek, UL and CSA directories under the retail brand name did not return a listing we could match to the Fuji. That is not the same as a finding of non-certification: a listing could exist under a different entity name or appear only on the unit label. Request the file number from Peak in writing and check it in the directory before installation.

Did Peak remove the five health statistics from the Fuji page?

Yes. On July 17 and July 19, 2026 the Fuji page carried five uncited statistics on detoxification, heart disease, pain, wrinkles and sleep. When we rechecked the page on September 1, 2026 those statistics were gone, replaced by named studies from JAMA Internal Medicine (2015), Age and Ageing (2017) and the American Journal of Hypertension (2017), a statement that the research is about sauna bathing as a habit rather than any brand, and a note that Peak saunas are wellness products, not medical devices. The figures Peak now quotes match the published papers.

Does the Finnish longevity research apply to the Fuji?

Not directly, and Peak's main health section now says so. The Laukkanen cohort studies were observational research on traditional Finnish sauna bathing, typically near 174°F, in middle-aged Finnish men; they did not study 150°F infrared cabins, and associations do not establish causation. The inconsistency that remains as of September 1, 2026 is a comparison module lower on the Fuji page that pairs the mortality finding, dated to 2018 rather than 2015, with the Fuji's 150°F specification under the caption "clinically meaningful heat."

What does Peak do better than other sauna brands?

Several things, based on the pages reviewed on September 1, 2026: a published price with no quote form, a full warranty component table on a linked page and in the manual, red-light irradiance published at three defined distances, specific published electrical requirements, remote preheat and scheduling that owners confirm work, a health section that now cites named studies and states their limits, and a willingness to publish critical customer reviews on its own product page.

What should I ask Peak before buying a Fuji?

Five things, in writing: the safety certification body and file number covering the complete cabin; the named laboratory, method and numeric results behind the EMF claim; a third-party wavelength and irradiance report for the red-light panel; the ionizer's ozone-emission data and certification status; and which warranty term, 1, 2, 3 or 7 years, Peak will honor on the red-light panel. A manufacturer confident in its claims should be able to answer all five in one reply.

Update log

Sources

1. Peak Saunas, Fuji product page: price and promotion, specification table, warranty accordion, health section, comparison module, EMF section, FAQ, owner reviews and Peak's replies (manufacturer; read in full September 1, 2026; earlier reads July 17 and July 19, 2026).
2. Peak Saunas, Brand Warranty page: component coverage table, exclusions and important terms (manufacturer; read September 1, 2026).
3. Peak Saunas, 7-Year Limited Residential Warranty page: installation window, circuit conditions, Professional Technical Support Coverage with the $350 single-visit cap (manufacturer; checked September 1, 2026).
4. Peak Saunas, Everest and Fuji owner's manual, 2-Person Full Spectrum, version 2 (PDF): electrical requirements, GFCI note, package contents including the oxygen ionizer, ionizer installation step, operation and overheat lock, Smart Life app guide, Peak Saunas app guide for the red-light panel, Section 13 warranty with the 3-year red-light panel term (manufacturer; read in full September 1, 2026).
5. Peak Saunas, owner's manuals page: manual list, "Last updated: August 19, 2026" (manufacturer; read September 1, 2026).
6. Peak Saunas, "EMF and Infrared Saunas: The Facts": updated August 31, 2026; "All Peak saunas test low EMF at body distance"; tier-label statement (manufacturer; read September 1, 2026).
7. Peak Saunas, "The 2026 Home Sauna Buyer's Guide": "Verified low-EMF under 2mg at sitting position"; Fuji price shown as $8,450 (manufacturer advertorial; read September 1, 2026).
8. Peak Saunas help center: articles "How Long Does It Take for My Sauna to Heat Up?" (indoor warm-up estimate and starting-room range), the EMF article giving about 3 mG, and the warranty article giving a 2-year red-light panel term (manufacturer; checked September 1, 2026).
9. Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine. 2015;175(4):542 to 548. PubMed record and publisher page (peer-reviewed; checked September 1, 2026).
10. Laukkanen T, Kunutsor S, Kauhanen J, Laukkanen JA. Sauna bathing is inversely associated with dementia and Alzheimer's disease in middle-aged Finnish men. Age and Ageing. 2017;46(2):245 to 249. PubMed record (peer-reviewed; checked September 1, 2026).
11. U.S. Environmental Protection Agency, "What are ionizers and other ozone-generating air cleaners?" (government guidance; checked September 1, 2026).
12. California Air Resources Board, "California's Regulation to Limit Ozone Emissions from Indoor Air Cleaning Devices" (regulator fact sheet; checked September 1, 2026).
13. California Air Resources Board, List of CARB-Certified Air Cleaning Devices: ionizers in the "Electronic" category, 0.050 ppm ozone-emission limit (regulator directory; checked September 1, 2026).
14. Intertek, ETL Listed Mark Directory (certification directory; checked September 1, 2026).
15. UL Solutions, Product iQ certification database (certification directory; checked September 1, 2026).
16. CSA Group, Certified Product Listing (certification directory; checked September 1, 2026).
17. Peak Saunas, "Why Buyers Trust Peak Saunas": 7-year red-light panel warranty statement (manufacturer; checked September 1, 2026).
18. Peak Saunas, "Which Sauna Brand Has the Best Warranty in 2026?": 7-year red-light panel warranty statement (manufacturer blog; checked September 1, 2026).
19. Peak Saunas, XL Medical-Grade Red Light Therapy Panel product page: "7-year warranty on all light therapy components" (manufacturer; checked September 1, 2026).