Finnmark
Finnmark FD-5 Trinity XL | 4-Person Infrared, Steam & Red Light Sauna
Finnmark FD-5 Trinity XL | 4-Person Infrared, Steam & Red Light Sauna
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The Finnmark FD-5 Trinity XL is the only home sauna that combines three complete wellness modalities in one cabin: UL-listed short-wave infrared heating, a traditional 4.5kW steam sauna heater, and medical-grade Spectrum Red Light™ Therapy. No compromises, no choosing between experiences. Just the full spectrum of sauna wellness, in a single beautifully crafted 4-person cabin. Free shipping included.
Three Modalities. One Sauna.
Infrared — Finnmark's UL-listed Spectrum Plus™ short-wave incoloy infrared heaters penetrate deep into muscle and tissue, producing a cleaner, more efficient sweat — up to 25 times more effective than standard carbon panel heaters. Core body temperature rises naturally, improving circulation, lowering blood pressure, and accelerating recovery.
Traditional Steam — The included Harvia KIP Series B 4.5kW sauna heater uses vulcanite stones to radiate even, intense heat. Ladle water onto the rocks for an authentic Finnish steam experience; the löyly that no infrared heater can replicate. Reaches up to 190°F for a full traditional sauna session.
Red Light Therapy — A 192-diode medical-grade Spectrum Red Light™ panel delivers 650nm red light therapy directly into the skin, stimulating collagen production, enhancing cellular recovery, and rounding out the session with chromotherapy for complete mind-body restoration.
Key Features
- Spectrum Plus™ UL-listed short-wave infrared heaters — deep penetrating heat, up to 25x more effective than carbon panels
- Harvia KIP 4.5kW traditional steam heater — vulcanite stones, water-tossing, up to 190°F
- 192-diode Spectrum Red Light™ Therapy panel — 650nm medical-grade red light with chromotherapy
- Built-in LCD Wi-Fi touchscreen controller with Bluetooth audio
- 6" Hi-Fi speakers for immersive audio
- Antimicrobial Western Canadian Cedar interior — naturally resistant to mold, bacteria, and fungus
- Thermal Plus™ Thermo-Aspen exterior — rot, warp, decay, and chip resistant
- Extra-large two-tier bench system
- 8mm tempered glass door for superior thermal retention
- Low EMF — tested by a NASA award-winning testing facility
- High emissivity infrared heaters
- ETL certified
- 4-person capacity
- Free shipping to the contiguous United States
Harvia KIP Series B 4.5kW Sauna Heater
The included Harvia KIP Series B is a wall-mounted, UL-listed electric sauna heater designed and made in Finland. Stainless steel construction with industrial-grade serviceable heating elements, direct rock-to-element contact, and an exceptionally large rock capacity for rich, consistent steam.
- 4.5kW, 240V / 1PH
- For sauna rooms 100 – 210 cubic feet
- Minimum 50 lbs of stones required — 1 box of Harvia AC3000 stones included
- Built-in controls, UL listed
- 2-year consumer warranty
Note: Each natural stone is unique in shape and size. An additional box of sauna stones is recommended to allow selection of the best fit — additional freight charges might apply if bought separately.
Benefits of Infrared
- Raises core body temperature for a deeper, cleaner sweat
- Removes up to 17% more toxins than conventional saunas — including heavy metals, cholesterol, and uric acid
- Supports lower blood pressure and improved heart health
- Accelerates muscle recovery through increased blood flow and oxygen delivery
- Natural pain relief with every session
Specifications
Sauna Cabin
| SKU | TRINITY-4X6 |
| Model | FD-5 |
| Brand | Finnmark |
| Capacity | 4 persons |
| Exterior Dimensions | 75"W x 64"D x 83"H |
| Interior Dimensions | 71"W x 57.5"D x 75.5"H |
| Room Volume | 130 cubic feet |
| Door Dimensions | 23.625"W x 68.875"H |
| Glass Thickness | 8mm with gasket |
| Exterior Material | Thermal Plus™ Thermo-Aspen |
| Interior Material | Western Canadian Cedar |
| IR Wattage | 2,700W |
| Voltage | 240V |
| Amperage | 15A |
| Plug Type | NEMA 6-15 |
| Max IR Temperature | 170°F |
| Max Traditional Temperature | 190°F |
| Certification | ETL, Low EMF |
| Product Weight | 575 lbs |
| Shipping Dimensions | 80"W x 40"D x 83"H |
| Shipping Weight | 840 lbs |
Harvia KIP Series B Sauna Heater
| Model | KIP45B |
| Kilowatt Rating | 4.5kW |
| Voltage | 240V / 1PH |
| Amperage | 18.8A |
| Room Size | 100 – 210 cubic feet |
| Width | 16" (406mm) |
| Depth | 11" (279mm) |
| Height | 24" (609mm) |
| Heater Weight | 40 lbs |
| Warranty | 2-Year (Consumer Use) |
What's Included
- 6 sauna panels — bottom, top, back, front, left, right
- Glass door, bench support, bench top, floor grid
- Spectrum Plus™ infrared heater panels
- Harvia KIP Series B 4.5kW sauna heater
- 1 box of Harvia AC3000 sauna stones (44 lbs)
- 192-diode Spectrum Red Light™ therapy panel with chromotherapy
- Spectrum LED near-infrared ceiling lights
- Controller 2.0 — LCD Wi-Fi touchscreen with Bluetooth audio
- Heater cable, floor cable, power supply unit, power cable
- Interior heater connections with wood cover
- Door handle, screws, ETL certification, limited warranty
Shipping & Delivery
Free shipping to the contiguous United States. This sauna ships on a wooden pallet by special appointment. Delivery is curbside only — the driver will lower items to ground level but will not bring them inside. We contact customers prior to shipping to confirm logistics and discuss any delivery circumstances.
Remote or complex delivery areas may not qualify for free shipping. Shipping dimensions: 80"W x 40"D x 83"H. Shipping weight: 840 lbs.
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Warranty policy
Warranty policy
Our warranty coverage varies by product category and manufacturer. All products sold through Marterra Elements are covered by the manufacturer's warranty as specified below.
Product-Specific Warranty Terms
Outdoor Showers & Saunas (SaunaLife)
- Structural Components: 3-year limited warranty on wood construction and structural integrity
- Hardware & Fixtures: 2-year warranty on stainless steel components, heaters, and fixtures
- Electrical Components: 1-year warranty on control systems and electrical parts
Official Warranty Information – SaunaLife
Hot Tubs & Spas (Empava, SaunaLife)
- Shell & Structure: 3-year limited warranty on acrylic shells and structural components
- Plumbing & Jets: 2-year warranty on pumps, jets, and plumbing systems
- Heaters & Controls: 2-year warranty on heating elements and control systems
- Cabinet & Cover: 1-year warranty on exterior cabinets and insulated covers
Official Warranty Information – SaunaLife
Official Warranty Information – Empava
Cold Plunge Tubs (Revive Plunge)
- Tub & Structure: 1-year comprehensive warranty
- Chiller Units: 1-year warranty on compressor and cooling systems
- Filtration Systems: 1-year warranty on pumps and filtration components
- Inflatable Models: 1-year warranty on materials and seams
Official Warranty Information – Revive Plunge
Infrared Saunas (Wizzisauna)
- Wood Structure: 3-year limited warranty
- Heating Panels: 5-year warranty on carbon-crystal heating elements
- Electronics: 1-year warranty on control panels and Bluetooth systems
Official Warranty Information – Wizzisauna
Compression Therapy Systems (Rapid Reboot)
- Control Units: 2-year warranty on CLASSIC and REGEN units
- Attachments: 2-year warranty on boots, hips, and arm attachments
- Accessories: 1-year warranty on thermal therapy sleeves
Official Warranty Information – Rapid Reboot
Fitness Equipment (OxeFit)
- Frame & Structure: Varies by model (see product specifications)
- Electronics & AI Systems: 1-year warranty
- Accessories: 1-year warranty
Official Warranty Information – OxeFit
Wellness Technology (Airvida)
- Red Light Therapy Beds: Varies by model (see product specifications)
- Hyperbaric Chambers: Varies by model (see product specifications)
- Hydrogen Systems: Varies by model (see product specifications)
1 year official warranty for all Airvida products and elements.
Pizza Ovens (Empava)
- Structure: 2-year warranty on oven body and construction
- Heating Elements: 2-year warranty on burners and heating systems
Official Warranty Information – Empava
What's Covered
Our warranty covers:
- Manufacturing defects in materials and workmanship
- Structural failures under normal use
- Malfunctioning components during the warranty period
- Parts replacement for defective components
What's Not Covered
The warranty does not cover:
- Normal wear and tear
- Damage from improper installation or use
- Damage from neglect, abuse, or misuse
- Damage from natural disasters, accidents, or acts of God
- Cosmetic damage that doesn't affect functionality
- Products modified or repaired by unauthorized technicians
- Damage from improper maintenance or cleaning
- Commercial use (unless specified as commercial-grade)
- Shipping damage (must be reported within 48 hours of delivery)
Warranty Claim Process
Step 1: Contact Us
- Email: support@marterraelements.com
- Include your order number, product name, and photos/videos of the issue
- Describe the problem in detail
Step 2: Evaluation
- Our team will review your claim within 2-3 business days
- We may request additional information or photos
Step 3: Resolution
- Repair: We'll provide replacement parts and instructions
- Replace: We'll ship a replacement unit if repair isn't feasible
- Refund: In rare cases, we may offer a refund (subject to approval)
Step 4: Return (if required)
- We'll provide a prepaid shipping label for warranty returns
- Pack the item securely in original packaging when possible
Installation & Maintenance Requirements
To maintain warranty coverage:
- Follow all installation instructions provided
- Use only authorized installers for products requiring professional installation
- Perform regular maintenance as specified in product manuals
- Use only approved cleaning products and methods
- Keep records of maintenance and service
Extended Warranty Options
Extended warranty coverage may be available for select products. Contact us for details on extended protection plans.
Manufacturer Direct Warranties
Some products are covered directly by the manufacturer. In these cases:
- Marterra Elements will facilitate the warranty claim process
- You may be directed to contact the manufacturer directly
- We'll assist with coordination and follow-up
Shipping & Handling
- Warranty Repairs: We cover shipping costs for warranty-approved repairs
- Non-Warranty Issues: Customer is responsible for shipping costs
- Curbside Delivery: Most products include free curbside delivery
- White Glove Service: Available for purchase on select items
Customer Satisfaction Guarantee
In addition to manufacturer warranties, Marterra Elements offers:
- 30-day satisfaction guarantee on select products
- Expert customer support throughout your ownership
- Access to installation guides and maintenance resources
- Dedicated support team for troubleshooting
Contact Information
Marterra Elements Customer Support
- Website: www.marterraelements.com
- Email: support@marterraelements.com
- Phone: +1 (844) 840-0414
- Hours: Monday-Friday, 8 AM - 4 PM EST
Important Notes
- Warranty terms begin from the date of purchase
- Original proof of purchase required for all warranty claims
- Warranty is non-transferable and applies to original purchaser only
- Some products may have different warranty terms - refer to product-specific documentation
- This warranty gives you specific legal rights, and you may have other rights which vary by state/province
Shipping & Refund
Shipping & Refund
Shipping Policy
We offer multiple shipping options depending on the product type, brand, supplier, and delivery location. In certain cases, products are fulfilled and shipped directly from our authorized suppliers or fulfillment partners.
All available shipping methods, costs, and estimated delivery timelines are clearly displayed at checkout before payment is completed. Read more about Shipping Policy.
Return Eligibility
Customers in the United States may request a return within 30 days of delivery, subject to the conditions outlined below.
To be eligible for a return:
- Items must be unused, undamaged, and in original condition
- Original packaging, labels, and included accessories must be intact
- Proof of purchase is required
Return eligibility may vary depending on the product type and supplier. Read more about Return and Refund

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