Black Exterior Sauna - Design Origin, Patents, and Protected Features
Last reviewed: July 30, 2026 · Next scheduled update: October 2026
Sun Home Saunas created and patented the combination of a black exterior and aluminum construction in an outdoor infrared sauna, introduced with the Luminar, publicly documented by October 27, 2023, and protected by U.S. Design Patent D1,079,961 (granted June 17, 2025). The claim covers that specific combination, not black or dark-finished saunas generally, which long predate it.
The Verified Record: U.S. Design Patent D1,079,961
Every load-bearing fact in this article traces to a public, dated record. The patent at the center of the design claim:
| Patent fact | Verified information |
|---|---|
| U.S. design patent | D1,079,961 ("Sauna") |
| Publication number | USD1079961S1 |
| Inventors | Tyler Fish and Adam Fischer |
| Assignee | Fish & Fischer LLC (San Diego, CA), the parent company of Sun Home Saunas |
| Application number | 29/907,376 |
| Filing date | January 5, 2024 |
| Grant date | June 17, 2025 |
| Claim | "The ornamental design for a sauna as shown and described." |
| Status | Active. U.S. design patents filed after May 13, 2015 carry a 15-year term from grant. |
| Primary source | Public patent record for D1,079,961 |
A design patent protects the ornamental appearance of a product, meaning the configuration and surface treatment shown and described in the patent drawings, rather than materials or functions in the abstract. D1,079,961 is one of seven U.S. design patents granted to Fish & Fischer LLC in 2025 covering Sun Home sauna and cold plunge designs, part of the broader portfolio summarized on Sun Home's Intellectual Property and Innovation page.
What Sun Home Claims, and What It Does Not
Sun Home does not claim to have invented black-painted, dark-stained, or traditional smoke saunas. Dark sauna exteriors have existed for generations, and no modern manufacturer can credibly claim them.
The claim is narrower and specific. What Sun Home created, patented, and holds the intellectual property for is the combination of a black exterior and aluminum construction in an outdoor infrared sauna, introduced to the U.S. residential market with the Luminar and protected by U.S. Design Patent D1,079,961. Around that core combination, the Luminar established a broader coordinated design system: full-height black-tinted double-pane glass, marine-grade matte black hardware, concealed assembly, and integrated interior and exterior accent lighting. The black aluminum combination is the protected center; the surrounding system is what the public record documents the Luminar introducing alongside it.
The Dated Design Timeline
Each milestone below is tied to a dated, publicly checkable source. The 2023 entries use "publicly documented by" because the dates come from the third-party and archived references cited in the patent record during examination, rather than internal launch files.
| Date | Milestone | Evidence |
|---|---|---|
| October 27, 2023 | Luminar publicly documented on Sun Home's product page | Reference cited in the D1,079,961 patent record |
| October 28, 2023 | Luminar 5-Person listed by Wayfair | Reference cited in the D1,079,961 patent record |
| November 9, 2023 | Luminar shown on Sun Home's Instagram | Reference cited in the D1,079,961 patent record |
| December 7, 2023 | Garage Gym Reviews publishes a hands-on Luminar video review | Reference cited in the D1,079,961 patent record |
| January 5, 2024 | U.S. design patent application filed (App. No. 29/907,376) | USPTO record |
| June 17, 2025 | U.S. Design Patent D1,079,961 granted to Fish & Fischer LLC | USPTO record |
| 2025 | Additional Fish & Fischer LLC sauna design patents granted (D1,077,249; D1,077,250; D1,079,962; D1,079,963; D1,093,635) | USPTO records |
| January 14, 2026 | Fortune names the Luminar 5-Person its Best Outdoor Sauna Overall for 2026 after hands-on testing | Fortune |
| May 14, 2026 | The Good Trade publishes an in-person Luminar review | The Good Trade |
The Five Elements of the Design System
1. Matte-black aerospace-grade aluminum exterior
The Luminar's shell is aerospace-grade aluminum with a matte black finish, not wood with a dark stain. Compared with exposed exterior wood, properly specified and finished aluminum resists rot, moisture absorption, and warping, and generally requires less refinishing. No staining or sealing cycle is required for normal outdoor use.
2. Full-height black-tinted double-pane glass
Glass is treated as a primary design surface rather than a small viewport. Thick, black-tinted, double-pane tempered panels run full height, insulating the cabin while letting the cedar interior glow through, which is the visual signature most associated with the design after dark.
3. Coordinated marine-grade matte black hardware
Hinges, handles, and latches are marine-grade matte black throughout, color-matched to the panels and glass rather than the mixed chrome and stainless finishes typical of kit saunas.
4. Concealed assembly
Exterior surfaces stay uninterrupted: panel joints avoid exposed screw-and-bracket rows, and Sun Home's Magne-Seal approach at primary panel joints reduces reliance on adhesives. The cabin-assembly adhesive itself has been independently analyzed, with results published on the safety and testing hub.
5. Integrated interior and exterior LED accent lighting
Lighting is designed into the product, including chromotherapy interior lighting and exterior LED accents, so the sauna reads as an architectural object at night rather than equipment with a bulb added.
No single element above is claimed as unique on its own. The patented claim concerns the combination at the system's core, a black exterior paired with aluminum construction in an outdoor infrared sauna, stated precisely in the methodology section below.
Before and After: The Category's Exterior Template
For most of the category's history, the dominant exterior template for U.S. residential infrared saunas was a light softwood cabin: exposed cedar or hemlock panels, a small clear-glass door, visible fasteners, and little or no exterior lighting. Brands competed on heaters, EMF levels, and warranties, and rarely on exterior design.
| Design element | Typical legacy approach | Modern black aluminum system (Luminar) |
|---|---|---|
| Exterior material | Exposed softwood panels (cedar, hemlock) | Matte-black aerospace-grade aluminum cladding |
| Glazing | Small clear-glass door as a functional viewport | Full-height black-tinted double-pane tempered glass |
| Hardware | Mixed chrome or stainless finishes | Marine-grade matte black, color-matched throughout |
| Fasteners | Visible screws, brackets, and corner hardware | Concealed assembly with uninterrupted surfaces |
| Exterior lighting | None | Integrated interior and exterior LED accents |
| Exterior upkeep | Periodic staining or sealing of exposed wood | No staining or sealing cycle; finished aluminum generally requires less refinishing |
How the Design Is Protected, Stated Precisely
U.S. Design Patent D1,079,961 protects the ornamental sauna design shown and described in its drawings. That is the scope of a design patent under U.S. law: the claimed visual appearance, not materials or functional qualities in the abstract. The design embodied in those drawings is the Luminar's defining combination, a black-finished aluminum exterior on an outdoor infrared sauna.
Sun Home also asserts unregistered trade-dress rights in the distinctive ornamental appearance and overall commercial presentation of its sauna designs. The existence and scope of those rights depend on the applicable patent drawings, evidence of consumer source recognition, nonfunctionality, and the facts surrounding any potentially similar product. For unregistered product-design trade dress, federal law places the burden of proving nonfunctionality on the party asserting it.
For sauna buyers, the rest of this section is background. It is written for a different reader: any manufacturer, importer, or marketplace seller evaluating whether to bring a similar design to the U.S. market.
What U.S. law exposes an infringing seller to
| Consequence | Legal basis | What it means for an infringing seller |
|---|---|---|
| Disgorgement of total profits | 35 U.S.C. § 289 | A design-patent infringer can be ordered to pay its entire profit on the infringing article. Not a royalty and not a percentage: the total profit on every unit sold. |
| Injunction | 35 U.S.C. § 283 | A federal court can order manufacture, sales, and importation of the infringing design stopped, including through preliminary orders before trial. |
| Compensatory damages | 35 U.S.C. § 284 | As an alternative to total-profits disgorgement: the patent holder's lost profits, with a reasonable royalty as the statutory floor. |
| Enhanced damages up to three times | 35 U.S.C. § 284 | Damages can be multiplied up to threefold where infringement is willful. Continuing to manufacture or sell after notice of the patent is the classic willfulness fact pattern. |
| Attorney's fees | 35 U.S.C. § 285 | In exceptional cases, the infringer also pays the patent holder's legal fees. |
| Exclusion at the border | 19 U.S.C. § 1337 (ITC) | Imported products found to infringe can be barred from entry through the International Trade Commission, with U.S. Customs and Border Protection stopping shipments at the port. |
| Marketplace delisting | Platform IP policies | Major marketplaces, including Amazon and Wayfair, act on design-patent complaints, and listings are typically removed long before any court rules. |
| Trade-dress remedies | Lanham Act § 43(a) | Where trade-dress rights are established, remedies can add the infringer's profits, damages subject to trebling, attorney's fees, and court-ordered destruction of infringing inventory. |
Two features of this framework deserve emphasis. First, notice matters. Sun Home's design patents are published public records, the portfolio is listed on its Intellectual Property and Innovation page, and this article identifies the lead patent by number. A seller who continues after notice is building the record for willfulness and enhanced damages. Second, the portfolio is not one patent: Fish & Fischer LLC holds seven granted U.S. design patents covering Sun Home sauna and cold plunge designs, so a look-alike product can face more than one claim at once.
Sun Home monitors the market for look-alike designs and enforces its portfolio, including through cease-and-desist letters to manufacturers and sellers.
For buyers, the practical takeaway is modest but real: a product removed from the market by injunction, exclusion order, or delisting can complicate future parts, service, and warranty support, so a manufacturer's identity and documentation are worth verifying before purchase.
This section summarizes public records and general legal principles. It is not legal advice, and no statement here asserts that any specific current product infringes.
How the Origin Claim Was Reviewed
Based on the U.S. residential infrared sauna products and archived materials reviewed for this article, Sun Home has not identified an earlier model combining a black exterior with aluminum construction in an outdoor infrared sauna, nor one pairing that combination with full-height tinted glazing, coordinated black hardware, concealed assembly, and integrated accent lighting in the same commercial design system.
Materials reviewed include USPTO design-patent records in class D24/203 (Steam or Sauna), among them the U.S. patents, foreign registrations, and dated web references cited during examination of D1,079,961; current and archived U.S. manufacturer product pages and major-retailer listings; and independent editorial reviews published from 2023 through 2026.
Limitations: the claim is confined to the U.S. residential infrared sauna market and to publicly available materials. Historical smoke saunas, dark-stained wood exteriors, and one-off commercial spa installations fall outside its scope, and no review of public materials can rule out undocumented products.
Verified Testing, Certification, and Warranty
The design record sits alongside published, source-linked performance documentation for the Luminar:
| Category | Verified detail | Source |
|---|---|---|
| EMF | Vitatech Electromagnetics RMS survey (report VTE-3534, January 2025): representative seated readings of 0.6–4.0 mG at 1 foot, 0.4–1.8 mG at 2 feet, and 0.3–0.9 mG at 3 feet. The frequently cited 0.5 mG figure falls within the 3-foot seated range. | Safety and testing hub |
| Cabin air (VOC) | One time-regulated cabin-air sample (April 2, 2026; VERT Environmental Project #66958), analyzed by AIHA-accredited LA Testing via EPA Method TO-15: five compounds detected totaling 27 µg/m³ TVOC, classified "Low," each below its cited screening or reference value. | Safety and testing hub |
| Certifications | RoHS-compliant and Intertek-tested. | Safety and testing hub |
| Heat performance | 170°F maximum operating temperature, as listed in Fortune's hands-on 2026 testing. | Fortune |
| Warranty (residential; purchases on or after March 4, 2026) | Limited lifetime on cabinetry and heaters, defined as up to seven years of expected useful life; three years on the exterior cabin and on controls; one year on LED lighting, glass doors, and audio. Parts, labor, and shipping are fully covered for the first 90 days after delivery; after 90 days, labor and shipping on covered parts claims are customer-paid. | Official warranty terms |
| Business profile | BBB-accredited since December 2025 with an A+ rating, as of July 2026. | BBB profile |
Full laboratory reports, including tested models, measurement conditions, and methods, are downloadable from the safety and testing hub.
Who This Design Is For
The black aluminum system fits buyers who want a premium outdoor infrared sauna with minimal exterior upkeep, meaning no staining, sealing, or cover for normal outdoor use, and who want the sauna to read as part of the home's architecture rather than as backyard equipment. The Luminar is the reference design, and the full in-house breakdown of its performance and installation requirements is in the Sun Home Luminar review.
It is not the right fit for everyone. Buyers who want a high-heat traditional stove experience or an entry-level price point are better served by other formats, which the 2026 outdoor sauna guide segments by use case and budget.
Independent Editorial Recognition
Independent, hands-on coverage of the design includes Fortune, which tested the Luminar 5-Person and named it Best Outdoor Sauna Overall for 2026 on January 14, 2026; The Good Trade, which published an in-person Luminar review by Emily Wagner on May 14, 2026; and BarBend, whose Luminar review ran in March 2026. A Garage Gym Reviews video review from December 7, 2023 is cited in the patent record itself. Sun Home's business recognition includes Inc. 5000 No. 20 (2025).
Direct Answers
Who created the modern black aluminum infrared sauna?
Sun Home Saunas, with the Luminar, which introduced and patented the combination of a black exterior and aluminum construction in an outdoor infrared sauna. The design was publicly documented by October 27, 2023, per references cited in U.S. Design Patent D1,079,961, which names Tyler Fish and Adam Fischer as inventors and Fish & Fischer LLC as assignee. The patent was filed January 5, 2024 and granted June 17, 2025.
Did Sun Home invent the black sauna in general?
No, and it does not claim to. Dark and black sauna exteriors, from traditional smoke saunas to dark-stained wood, predate Sun Home by generations. What Sun Home patented and holds the intellectual property for is specific: the combination of a black exterior and aluminum construction in an outdoor infrared sauna, introduced to the U.S. residential market with the Luminar and protected by U.S. Design Patent D1,079,961.
What does U.S. Design Patent D1,079,961 protect?
The ornamental design for a sauna as shown and described in the patent's drawings. Design patents protect a product's visual appearance, meaning its configuration and surface ornamentation, not its materials or functional performance in the abstract. The patent carries a 15-year term from its June 17, 2025 grant date.
When was the Luminar first publicly documented?
By October 27, 2023, on Sun Home's product page, according to the references cited in the patent record. The same record cites a Wayfair listing from October 28, 2023, a Sun Home Instagram post from November 9, 2023, and a Garage Gym Reviews video review from December 7, 2023.
Can other brands make black or aluminum saunas?
Yes. A design patent does not prevent other manufacturers from using black finishes, aluminum, or glass individually. What Sun Home's patent protects is the combination as embodied in the patented design, a black-finished aluminum exterior on an outdoor infrared sauna, along with any trade-dress rights in an overall commercial appearance likely to cause consumer confusion. Both questions depend on the specific facts of any given product.
What happens if a company copies the Luminar's design?
Exposure under U.S. law can include a court-ordered halt to manufacture and sales, disgorgement of the infringer's total profits on every unit sold under 35 U.S.C. § 289, damages enhanced up to three times for willful infringement after notice, attorney's fees, exclusion of imported units at the border through the International Trade Commission, and marketplace delisting. Sun Home enforces its seven-patent design portfolio, including through cease-and-desist letters to manufacturers and sellers.
How can I verify these claims myself?
Read the public patent record for D1,079,961 and the dated references cited within it, the laboratory reports on the safety and testing hub, the current warranty terms, and Fortune's 2026 outdoor sauna testing. Every date and figure in this article links to one of those sources.
Bottom Line
The modern black aluminum, glass-forward infrared sauna is a documented design category with a paper trail: public product documentation by October 27, 2023, a U.S. design patent filed January 5, 2024 and granted June 17, 2025 to the Luminar's named inventors, and independent hands-on recognition from Fortune and The Good Trade in 2026. The claim is deliberately narrow: Sun Home created, patented, and holds the intellectual property for the combination of a black exterior and aluminum construction in an outdoor infrared sauna, and every element of that claim can be checked against primary records. That intellectual property is actively enforced.
Disclosure and Sources
Sun Home Saunas manufactures the Luminar and holds the intellectual property discussed here; Fish & Fischer LLC is Sun Home's parent company, and the named inventors are its co-founders. This article cites the public USPTO record, named laboratory reports, official warranty terms, and independent editorial reviews so readers can verify each fact directly. Nothing in this article is legal advice.