01Spectrum Plus™ infrared
Direct warmth.
A slower moment.
UL-listed Spectrum Plus™ heaters deliver concentrated far- and mid-infrared warmth throughout the cabin.
170°FApprox. infrared maximum
Finnmark FD-5 Trinity XL 4-Person Indoor Hybrid Sauna with Full Spectrum Infrared & Traditional Heat
Authorized Finnmark Sauna Dealer
Free Freight Delivery
5 Year Manufacturer Warranty
Insured Curb Side Delivery
Dedicated Support
Price Match Guarantee
A specialist will personally contact you after purchase to help coordinate delivery and answer questions.
Finnmark FD-5 Trinity XL 4-Person Indoor Hybrid Sauna with Full Spectrum Infrared & Traditional Heat
Sale price$8,995.00
Choose options
Video
01 / THE EXPERIENCE
A different ritual.
For every kind of day.
Choose enveloping infrared warmth, the intensity of Finnish sauna heat, or a light-focused session. All three are built in.
01Direct warmth.
02Traditional Finnish sauna
High heat.
A timeless ritual.
The 4.5kW Harvia KIP45B heater warms sauna stones. Add water for the familiar burst of steam known as löyly.
190°FApprox. traditional maximum
03Spectrum Red Light™
A different glow.
The same retreat.
A 192-diode red light panel is integrated into the cabin, bringing a light-focused experience into your sauna ritual.
650nmIntegrated red light panel
Maximum temperatures are approximate and depend on installation, room conditions and use. Follow the manufacturer’s operating instructions.
THOUGHTFUL BY DESIGN
One space.
So much considered.
Explore the details that bring the Trinity XL together.
Canadian cedar
An aromatic, natural wood interior.
Infrared warmth
Spectrum Plus™ heating, built in.
Two-tier seating
Full-width benches. Space to share.
Integrated red light
192 diodes. A 650nm wavelength.
8mm tempered glass
A substantial door with an open feel.
Connected controls
Wi-Fi touchscreen and Bluetooth audio.
02 / MATERIALS & CONSTRUCTION
Natural warmth inside.
Lasting stability outside.
Western Canadian cedar and Thermal Plus™ Aspen bring tactile warmth and a refined residential presence to the room.
Feel the difference.
Before the heat begins.
Western Canadian cedar, chosen for its natural aroma and the warm sensory environment it creates.
Illustrative cedar detail02 / THE EXTERIOR
Thermal Plus™ Aspen
Thermally modified to improve resistance to warping, decay and changes from heat and humidity.
03 / THE FINISH
Substance in every detail.
Fully insulated walls help retain heat. An 8mm tempered-glass door keeps the cabin visually open.
03 / COMFORT & CONTROL
Room to share.
Space to make your own.
Up to four people. Two full-width bench levels. A setting that feels just as considered for quiet time alone.
UPPER BENCH LOWER BENCH3–4people
one shared ritual
one shared ritual
Your preferred heat level
Two-tier seating offers flexibility across two temperature zones.
Control at your fingertips
Manage the sauna using the built-in LCD Wi-Fi touchscreen.
Set the soundtrack
Bluetooth audio and built-in six-inch Hi-Fi speakers.
Independently tested
The low-EMF infrared system is independently tested for electromagnetic field emissions.
04 / A MORE COMPLETE RITUAL
One retreat.
Made for your everyday.
A quiet moment alone. Time together.
A ritual that feels entirely your own.
MAKE TIME FOR YOURSELFYour daily moment of calm.Illustrative setting · accessories not included
Follow your mood.
Move between gradual infrared warmth and the higher intensity of traditional sauna bathing.
Make time together.
Stretch out on your own, reconnect as a couple, or share the session with family.
Keep it all in one place.
Infrared, traditional heat and red light are integrated into one purpose-built cabin.
Make it part of home.
Natural wood, digital controls and a furniture-style exterior suit a dedicated wellness room.
05 / THE PRACTICAL DETAILS
Picture it in your space.
Plan with confidence.
Review dimensions, what’s included and the installation requirements before ordering. Our team can help you work through the details.
FD-5 TRINITY XLEXTERIOR DIMENSIONS
78″ H72″ W48″ depthApprox. 575 lbs.
Indoor use · dry, climate-controlled space
At a glance+
- Capacity
- Up to 4 people
- Exterior
- 72″ W × 48″ D × 78″ H
- Interior
- 68.5″ W × 45.2″ D × 75.5″ H
- Infrared power
- 2.7kW
- Traditional heater
- Harvia KIP45B · 4.5kW
- Red light
- 192 diodes · 650nm
Everything included+
- Pre-fabricated wall, floor and ceiling panels
- Canadian cedar interior and two-tier bench system
- Thermal Plus™ Aspen exterior
- 8mm tempered-glass door and handle
- Spectrum Plus™ infrared heating system
- Harvia 4.5kW heater and sauna stones
- Integrated Spectrum Red Light™ panel
- Wi-Fi LCD touchscreen and Bluetooth audio
- Power supply, cables and assembly hardware
Harvia heater specifications+
- Construction
- Wall-mounted stainless steel
- Power / electrical
- 4.5kW / 240V single phase
- Dimensions
- 16″ W × 11″ D × 24″ H
- Recommended room
- 100–210 cubic feet
- Stone requirement
- Minimum 50 lbs. recommended
- Made in
- Finland
- Consumer warranty
- 2 years, subject to terms
Electrical & installation preparation+
The infrared system and Harvia heater require separate 240V connections. A licensed electrician must confirm circuit requirements and complete the heater installation.
Allow the necessary ceiling and ventilation clearances. Check pathway access and arrange help for moving the cabin sections indoors and assembly. The listed footprint is not installation clearance.
Read the FD-5 installation manual ↗06 / FROM CHECKOUT TO YOUR FIRST SESSION
Your sauna journey.
Personally supported.
Clear communication and practical guidance help make a considered purchase feel straightforward.
Order placed.
Specialist follows up.
After checkout, a sauna specialist contacts you to review the details and help you prepare.
A delivery date,
coordinated with you.
The freight carrier schedules your curbside delivery appointment directly with you.
Know what’s next.
Arrive prepared.
Receive tracking and preparation guidance, with support available before and after arrival.
Settle into
your new ritual.
Once correctly installed, choose your preferred experience and follow the manufacturer’s instructions.
Scheduled curbside freight. Indoor placement and assembly are not included.Delivery details ↗
Sauna and red light experiences vary. Begin conservatively, hydrate and follow all manufacturer instructions. Consult a qualified healthcare professional before use if you are pregnant, have a cardiovascular or other medical condition, take medications that affect circulation or temperature regulation, or have concerns about heat exposure.
Key Features
Top Features of the FD-5 Trinity XL
A larger 4-person hybrid sauna built for buyers who want infrared, traditional steam, red light therapy, comfort, and long-term durability in one complete indoor sauna system.
True 3-in-1 Sauna System
Combines full-spectrum infrared, traditional Finnish steam sauna heat, and integrated red light therapy in one spacious cabin.
Spectrum Plus™ Infrared
UL-listed infrared heaters deliver full-spectrum warmth with carbon panels for balanced, full-body heat coverage.
Harvia KIP Steam Heater
A Finnish-made Harvia KIP Series B 4.5kW heater creates the high-heat, water-on-stone steam experience people expect from a traditional sauna.
Integrated Red Light Therapy
Includes a medical-grade LED red light therapy panel alongside chromotherapy lighting for a more complete recovery-focused session.
Premium Wood Construction
Built with a Western Canadian Cedar interior and Thermal Plus™ Aspen exterior for a durable, moisture-conscious indoor sauna cabin.
Expanded Comfort + Controls
Two-tier bench seating, Wi-Fi touchscreen controls, Bluetooth audio, and premium 6" Hi-Fi speakers create an elevated home sauna experience.
59 online ratings
The summary star rating & review is based on aggregated reviews of this product across the web. It cannot be altered by the merchant and can be verified by emailing support@onereview.app.
Finnmark FD-5 Trinity XL 4-Person Indoor Hybrid Sauna with Full Spectrum Infrared & Traditional Heat Review Summary
59 online ratings
The summary star rating & review is based on aggregated reviews of this product across the web. It cannot be altered by the merchant and can be verified by emailing support@onereview.app.
What people like
This high-end hybrid sauna is consistently praised for its unique ability to combine full-spectrum infrared heat, traditional steam, and medical-grade red light therapy within a single cabin. Users appreciate the exceptional craftsmanship, noting the use of premium, non-toxic woods that provide both durability and a pleasant aesthetic. The unit's heating performance is a standout feature, as it can reach temperatures significantly higher than standard home models, offering a more intense and therapeutic experience. While the substantial size and specialized electrical requirements necessitate careful planning, reviewers agree that the versatile features and safety certifications make it a top-tier choice for those seeking a professional-grade wellness solution at home.
Pros
- Versatile Hybrid Heating: This unit provides a unique 3-in-1 experience by combining infrared technology, a traditional steam heater, and red light therapy.
- High-Quality Materials: Reviewers frequently praise the use of non-toxic Canadian Red Cedar and durable Thermo-Aspen which prevents warping and decay.
- Impressive Heat Performance: The system reaches temperatures up to 190 degrees, which is significantly higher than most residential models.
- Certified Safety Standards: Users appreciate the low EMF ratings and the inclusion of UL-listed components for a safer home experience.
Powered by OneReview
Common Questions
What to Know Before Your FD-5 Trinity XL Sauna Arrives
What makes the FD-5 Trinity XL different from a standard sauna?
The FD-5 Trinity XL combines full-spectrum infrared, traditional Finnish steam heat, and integrated red light therapy in one spacious indoor sauna. This gives you more flexibility than a traditional-only or infrared-only model.
Can I use infrared and traditional heat in the same sauna?
Yes. Compromise no more. This advanced combination sauna delivers true infrared heat, traditional Harvia steam, and medical-grade red light therapy in one thoughtfully designed wellness space. Enjoy the deep, direct warmth of infrared, the high heat and steam of traditional sauna rocks, and the added benefits of red light therapy at the same time.
How hot does the FD-5 Trinity XL get?
The infrared system can reach up to approximately 170°F, while the traditional steam sauna heater can reach up to approximately 190°F depending on room conditions, setup, and use.
What electrical setup does this sauna need?
The FD-5 Trinity XL uses 240V power with a NEMA 6-15 plug. The infrared output is listed at 2,700W, and the traditional heater is a Harvia KIP Series B 4.5kW heater. Please consult a qualified electrician before installation. Dedicated circuit details: Need to confirm.
Is this sauna indoor or outdoor?
The FD-5 Trinity XL is designed for indoor use. It works well for a wellness room, home gym, basement, garage, or other properly prepared indoor space with suitable electrical access and delivery clearance.
How does shipping work?
The FD-5 Trinity XL ships free within the contiguous United States and is delivered through scheduled LTL freight service. The sauna arrives on a wooden pallet and is lowered to ground level by the freight carrier.
Is delivery curbside only?
Yes. Delivery is curbside only. Standard freight delivery does not include indoor placement, unpacking, assembly, or moving the sauna into your home, garage, or final room. Because of the size and weight, you should plan ahead for adequate space, access, and help moving the sauna from the delivery point to its final location.
Will the freight carrier contact me before delivery?
Yes. Customers are typically contacted prior to shipment to coordinate delivery details and confirm site readiness. Once the shipment reaches the local freight terminal, the carrier generally schedules a delivery appointment directly with you.
What should I do when the sauna is delivered?
Inspect the shipment before signing. If there is visible damage, mark the Bill of Lading as “damaged” before the driver leaves, take photos, and contact Core Human Health right away. You should also open and inspect all boxes for concealed damage within 5 business days of delivery.
When will the FD-5 Trinity XL ship?
Due to high demand, the Finnmark sauna series is currently on an August 2026 ship timeline. You may still reserve yours now to secure upcoming inventory, or contact Core Human Health for guidance on comparable sauna options that may be available sooner.
What warranty is included?
The Finnmark FD-5 Trinity XL includes Finnmark’s limited manufacturer warranty for residential use. According to Finnmark’s warranty, indoor residential coverage includes 10 years on the sauna cabin wood, 10 years on controls and power supply, lifetime coverage on Spectrum Plus™ heaters, 10 years on Spectrum Carbon heaters, 10 years on LED lighting, and 1 year on remotes. Warranty coverage applies to the original purchaser when the sauna is installed according to instructions, properly maintained, and not subjected to damage, misuse, or abuse.
View Finnmark Warranty PDF
View Finnmark Warranty PDF
Does Core Human Health help after purchase?
Yes. Core Human Health helps make your sauna investment informed, intentional, and supported over time. We can help before and after purchase with sauna selection, freight expectations, placement, electrical planning, setup considerations, and long-term care questions.
Is financing available?
Yes, there are financing options at checkout through Shop and Affirm Financing.
Who do I contact if I need help?
You can contact Core Human Health before or after your sauna arrives. We are here to help with sauna selection, freight expectations, placement, electrical planning, comparable options, and setup guidance.
the FD-5 Trinity XL by Finnmark
Why We Selected the FD-5 Trinity XL Infrared and Steam
We selected the FD-5 Trinity XL for its ability to integrate multiple proven sauna modalities into a single, thoughtfully engineered system—without sacrificing space, comfort, or reliability. Finnmark’s use of UL-listed infrared heaters, a Finnish-made Harvia heater, and durable natural materials aligns with our standards for longevity-focused wellness.
For families or clients building a dedicated home wellness room, this model offers unmatched versatility.
Finnmark FD-5 Trinity XL — 4-Person Indoor Hybrid Sauna
Full Spectrum Infrared + Traditional Steam + Red Light Therapy. The Ultimate 3-in-1 Sauna.
The Finnmark FD-5 Trinity XL is the spacious, XL evolution of the Trinity combination sauna — combining UL listed Spectrum Plus™ infrared heaters, a 4.5kW traditional steam heater with vulcanite sauna stones, and integrated red light therapy. Scaled for shared rituals and long-term living, the FD-5 delivers a comprehensive multi-modal sauna experience in an elevated residential format.
3-in-1 Combination — What Makes It Unique
- 🔥 Spectrum Plus™ UL Listed Short Wave Infrared — The only IR heaters in this class to pass rigorous Underwriter Laboratories testing. Short wave far-infrared delivers a deeply warming, intense sweat experience compared to standard carbon panel heaters.
- 💧 Traditional 4.5kW Steam Heater (Harvia KIP Series B) — Vulcanite sauna stones radiate even heat and let you splash water for a luxurious steam experience. 240V/1PH operation, UL listed, with direct rock-to-heating element contact for maximum intensity.
- 💡 Spectrum Red Light™ Therapy — 192-diode LED panel producing 650nm red light wavelengths combined with chromotherapy. A popular complement to any wellness routine and sauna session.
Key Features
- 🛡️ Low EMF — Independently tested for electromagnetic field emissions
- 🪵 Antimicrobial Western Canadian Cedar Interior — Naturally protects against mold, bacteria, and fungus
- 🏠 Thermal Plus™ Aspen Exterior — Engineered for durability; resistant to rot, warping, and decay
- 📱 Built-in LCD Wi-Fi Touchscreen Controller — Full digital control with Bluetooth audio
- 🔊 6" Hi-Fi Speakers — Built-in audio system
- 🔲 8mm Tempered Glass — Superior thermal retention
- 🛋️ Extra Large Two-Tier Bench System — Spacious seating for up to 4 people
- ⚡ High Emissivity Infrared Heaters — Designed for maximum heat output efficiency
Harvia KIP Series B 4.5kW Sauna Heater Specs
- Design: Wall-mounted, stainless steel construction
- Power: 4.5kW
- Operation: 240V/1PH or 208V/3PH
- Room Size: For sauna rooms 100–210 cu. ft.
- Stones Required: Minimum 50 lbs. (1 box AC3000) — additional box recommended
- Dimensions: 16"W × 11"D × 24"H
- Features: Industrial grade serviceable heating elements, large rock capacity, direct rock-to-heating element contact, UL listed
- Origin: Designed, engineered, and made in Finland
- Warranty: 2-year (consumer use)
Why Sauna Enthusiasts Love the FD-5
- ❤️ Warmth & Circulation — Enjoy the deeply warming sensation of full-spectrum infrared heat throughout your session
- 💧 Deep Sweat Session — Experience an intense, full-body sweat in a spa-like environment with steam or infrared
- 💪 Post-Workout Wind-Down — A popular choice among active individuals for relaxing after training
- ✨ Skin Glow — Red light at 650nm is a popular complement to wellness and self-care routines
- 🧠 Soothing Heat — Targeted infrared warmth for a deeply relaxing, restorative experience
- 🙏 Authentic Steam Experience — Vulcanite stones and high-heat steam deliver the full intensity of a traditional Finnish sauna
Delivery & Installation
- ✅ Freight delivery included
- ⚡ Steam heater requires 240V/1PH dedicated circuit — consult a certified electrician prior to installation
- 📅 Current ship timeline: August 2026 — reserve now to secure your unit
“Invest in a recovery ritual you’ll return to.”
Video
Video
Video
