Finnmark FD-4 Trinity 2-Person Combination Sauna | Infrared + Traditional Steam
- Authorized Retailer of Finnmark Designs
- Manufacturer Warranty Included
- Free Freight Shipping — Curbside Delivery by Appointment
- Secure Checkout & U.S.-Based Customer Support
- ETL Safety Certified
Due to increased demand, Finnmark FD Series saunas are currently on backorder with an estimated restock date of August 28.
Orders are still being accepted and will be fulfilled in the order they are received once inventory becomes available.
Your card will be charged at the time of order to reserve your unit from the incoming shipment. Orders are fulfilled in sequence once inventory becomes available.
✔ Reserve your unit from the incoming shipment
✔ Orders ship in sequence upon restock
✔ Tracking information will be provided once your order ships
Questions? Contact our team anytime — we’re happy to assist with product selection, planning, and availability.
Finnmark FD-4 Trinity 3-in-1 Combination Sauna | 2-Person Infrared, Traditional & Red Light Sauna
Full-Spectrum Infrared Heat, Traditional Finnish Sauna Heat & Spectrum Red Light Therapy in One Indoor Cabin
The Finnmark FD-4 Trinity Combination Sauna is a premium 2-person indoor sauna designed for customers who want a complete home wellness experience without choosing between infrared, traditional sauna heat, or red light therapy. This advanced 3-in-1 sauna combines Finnmark Spectrum Plus™ infrared heaters, a Harvia Vega Compact 1900 traditional electric sauna heater, and Spectrum Red Light™ Therapy in one beautifully crafted cabin.
Built with a Western Canadian cedar interior, a durable Thermal Plus™ Aspen exterior, 8mm tempered glass, built-in Wi-Fi touchscreen controls, Bluetooth audio, and low-EMF tested infrared heating, the FD-4 Trinity is designed for serious home sauna users who want flexibility, performance, and a luxury indoor sauna experience.
Enjoy lower-temperature infrared sauna sessions up to approximately 170°F, or use the traditional electric heater for a hotter Finnish-style sauna experience up to approximately 190°F. The included Harvia Vega Compact 1900 heater allows water to be poured over sauna stones for an authentic steam sauna feel.
Intended for indoor residential installation only. Not a medical device. Wellness-related statements are for general informational purposes only and are not intended to diagnose, treat, cure, or prevent any disease or medical condition.
Browse all infrared saunas, explore the full Finnmark Designs collection, or shop all saunas.
Why Choose the Finnmark FD-4 Trinity?
The FD-4 Trinity is designed for customers who want the flexibility of three wellness experiences in one compact indoor sauna cabin.
| Feature | Infrared-Only Sauna | FD-4 Trinity |
|---|---|---|
| Full-spectrum infrared heat | Varies | Yes |
| Traditional electric sauna heater | No | Included |
| Red light therapy panel | Usually No | Included |
| Wi-Fi touchscreen controller | Varies | Included |
| Bluetooth audio | Varies | Included |
| ETL safety certification | Varies | Yes |
Best For
- Indoor residential sauna installation
- Couples or 2-person households
- Customers who want infrared, traditional sauna heat, and red light therapy in one cabin
- Home gyms, wellness rooms, primary suites, and relaxation spaces
- Buyers who want a compact luxury sauna with flexible heating options
- Customers who prefer a standard 120V sauna setup instead of a larger hardwired traditional sauna
Key Features
- 3-in-1 combination sauna experience
- Full-spectrum Spectrum Plus™ infrared heaters
- Traditional Harvia Vega Compact 1900 electric sauna heater included
- Spectrum Red Light™ Therapy panel included
- Designed for 2-person indoor residential use
- Maximum temperature: infrared up to approximately 170°F; traditional sauna heat up to approximately 190°F
- Western Canadian cedar interior
- Thermal Plus™ Aspen exterior
- Built-in LCD Wi-Fi touchscreen controller
- Bluetooth audio with 6" Hi-Fi speakers
- 8mm tempered glass for thermal retention
- Extra-large two-tier bench system
- Low EMF tested by an independent testing facility
- ETL safety certified
Heating System
Full-Spectrum Infrared Heat
- Spectrum Plus™ infrared heaters provide full-spectrum infrared coverage
- Short-wave infrared heaters are UL listed
- High-emissivity infrared heating system
- Designed to create a deep, comfortable sauna sweat at lower ambient temperatures than many traditional sauna sessions
Traditional Sauna Heater
- Includes Harvia Vega Compact 1900 sauna heater
- 1.9kW traditional electric sauna heater
- 120V operation
- Designed for sauna rooms from 70 to 106 cu. ft.
- Allows water to be poured over sauna stones for a traditional Finnish-style steam experience
- Requires a minimum of 29 lbs of sauna stones
Spectrum Red Light™ Therapy
- Medical-grade Spectrum Red Light™ Therapy panel included
- 192-diode LED panel
- 650nm red light therapy combined with chromotherapy
- Designed as a relaxing enhancement to your sauna wellness routine
Red light therapy information is provided for general wellness purposes only. This product is not intended to diagnose, treat, cure, or prevent any medical condition.
Materials & Construction
- Interior: Western Canadian cedar
- Exterior: Thermal Plus™ Aspen
- Glass: 8mm tempered glass with gasket
- Bench: Extra-large two-tier bench system
- Door: Tempered glass door with handle
- Design: Compact 2-person indoor sauna cabin
Natural variations in wood grain, tone, and texture are normal characteristics of real wood products.
Sauna Specifications
- Brand: Finnmark Designs
- Model: FD-4 Trinity
- Sauna Type: 3-in-1 combination infrared, traditional, and red light sauna
- Capacity: 2 persons
- Exterior Dimensions: 48"W x 48"D x 83"H
- Interior Dimensions: 44.25"W x 45.5"D x 75.5"H
- Room Volume: 86 cu. ft.
- Door Dimensions: 23.625"W x 68.875"H
- Door Handle Dimensions: 1.5"W x 13.25"H
- Glass Thickness: 8mm with gasket
- Product Weight: 437 lbs
- Shipping Dimensions: 80"W x 40"D x 58"H
- Shipping Weight: 618 lbs
- Volts: 120V
- IR Watts: 1750W
- Amperage: 15/20A
- Plug Type: NEMA 5-15P
- Outlet: Standard 120V 15A outlet
- Maximum Temperature: Infrared up to approximately 170°F; traditional up to approximately 190°F
- Installation: Indoor residential use only
Harvia Vega Compact 1900 Heater Specifications
- Heater Model: Harvia Vega Compact 1900
- Kilowatt Rating: 1.9kW
- Primary Fuel: Electric
- Voltage: 120V
- Phase: 1PH
- Nominal Amps: 15.9A
- Minimum Adjusted Cubic Feet: 70 cu. ft.
- Maximum Adjusted Cubic Feet: 106 cu. ft.
- Heater Dimensions: 11"W x 11"D x 21"H
- Heater Weight: 15.4 lbs
- Shipping Weight with Sauna Stones: 59.4 lbs
- Construction: Stainless steel
- Controls: Built-in controls with ergonomic switches
- Country of Design/Manufacture: Designed, engineered, and made in Finland
- Warranty: 2-year consumer-use heater warranty
Sauna heater stones are important to heater safety and performance. Proper stone placement and maintenance are required for safe operation and warranty validity.
What's Included
- Bottom panel
- Top panel
- Back panel
- Front panel
- Left panel
- Right panel
- Glass door
- Bench support
- Bench top
- Heater cable
- Floor cable
- Screws and installation hardware
- Power supply unit
- Power cable
- Interior heater connections with wood cover
- Door handle with screws
- Infrared sauna heater panels
- Harvia Vega Compact 1900 sauna heater
- 1 box of Harvia AC3000 sauna stones, 29 lbs
- Spectrum LED near-infrared ceiling lights combined with medical-grade Spectrum Red Light Therapy
- Controller 2.0 built-in LCD Wi-Fi touchscreen control panel with Bluetooth audio
- Manufacturer documentation
- ETL certification documentation
Each natural sauna stone is unique in shape and size. An additional box of sauna stones may be helpful for selecting the best fit, form, and function. Additional freight charges may apply if ordered separately.
Installation Notes
- Indoor residential installation only
- Install in a dry, climate-controlled indoor environment
- Requires standard 120V 15A outlet
- Review manufacturer installation instructions before assembly
- Confirm local building and electrical requirements before installation
- Professional electrical consultation is recommended where required by local code
- Allow appropriate clearance around the sauna according to manufacturer instructions
Shipping
- Free freight shipping within the contiguous United States
- Ships on a wooden pallet
- Curbside delivery by appointment
- Freight carrier will contact you to schedule delivery
- Driver is responsible for curbside delivery only and will lower the shipment to ground level when standard delivery conditions allow
- Customer must be present to receive and inspect the shipment
- Tracking information will be provided once the order ships
- Shipping dimensions: 80"W x 40"D x 58"H
- Shipping weight: 618 lbs
Prior to shipping, Prime Regeneration may contact customers to review shipment details and discuss any delivery circumstances that could complicate delivery or create additional delivery expenses. This product is currently on backorder with an estimated restock date of August 28. Orders will ship in sequence once inventory becomes available.
Enhance your FD-4 Trinity sauna experience with these recommended recovery tools.
-
Cold Plunge
Icetubs IceBath Cold Plunge with Heating & Cooling — a premium hot/cold contrast therapy pairing -
Massage Chair
KoziSense L66 4D + 3D Dual Mechanism Luxury Massage Chair — full-body massage for post-sauna relaxation
Need Help Comparing Sauna Options?
The Finnmark FD-4 Trinity is a unique 3-in-1 sauna because it combines full-spectrum infrared heat, a traditional electric sauna heater, and Spectrum Red Light™ Therapy in one 2-person indoor cabin. Because of that, another sauna may not be an exact substitute.
If you need a sauna sooner, you can browse our available sauna collection or contact Prime Regeneration for help comparing in-stock options based on your space, preferred heat type, electrical setup, and seating capacity.
Warranty
- Manufacturer limited warranty applies
- Warranty coverage is provided by Finnmark Designs according to the terms of the manufacturer warranty
- Harvia Vega Compact 1900 heater includes a 2-year consumer-use warranty
- Proper installation, use, and maintenance are required for warranty eligibility
Additional Resources
- 2-person indoor 3-in-1 combination sauna
- Full-spectrum infrared heat, traditional sauna heat, and Spectrum Red Light™ Therapy
- Includes Harvia Vega Compact 1900 traditional electric sauna heater
- Western Canadian cedar interior with Thermal Plus™ Aspen exterior
- Built-in Wi-Fi touchscreen controller and Bluetooth audio
- 8mm tempered glass and extra-large two-tier bench system
- Low EMF tested
- ETL safety certified
- Free freight shipping with curbside delivery by appointment
- Manufacturer warranty included
- Currently backordered until August 28
Important: This sauna is intended for indoor residential use only. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Product specifications, availability, warranty terms, delivery timing, and restock dates may change. Please review manufacturer documentation and confirm all installation requirements before purchase.
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