Experience three distinct wellness technologies in one premium home sauna with the Finnmark FD 4 Trinity InfraSteam Sauna. The FD 4 combines full spectrum infrared heat, traditional Finnish sauna heat with steam capability, and integrated 650nm red light LEDs in one thoughtfully engineered two person sauna.
The Trinity pairs Finnmark's UL Listed Spectrum Plus™ short wave infrared heaters and Spectrum Carbon 360° long wave panels with a Harvia Vega Compact 1.9 kW traditional sauna heater. This gives you the flexibility to choose enveloping infrared warmth or the higher temperature experience of a traditional sauna, with the ability to add water to the sauna stones for bursts of steam and humidity.
An integrated 192 diode Spectrum Red Light™ LED panel adds 650nm red light alongside selectable chromotherapy, bringing another dimension to the sauna environment without requiring separate equipment.
The infrared system reaches temperatures up to 170°F, while the traditional sauna system reaches temperatures up to 190°F. The infrared system operates on 120 V, while the traditional Harvia heater provides the classic combination of heated sauna stones, higher temperatures and steam capability.
Inside, antimicrobial Western Canadian cedar provides a naturally aromatic environment with resistance to mold, bacteria and fungus. The Thermal Plus™ Aspen exterior is heat and steam treated for enhanced durability and resistance to rot, warping, decay and chipping.
For those who value versatility without compromise, the FD 4 Trinity brings infrared warmth, traditional sauna heat, steam and integrated red light together in one beautifully designed home wellness retreat.
Features
Three In One Sauna Experience: Combines full spectrum infrared heat, traditional Finnish sauna heat with steam capability, and integrated 650nm red light LEDs within one premium two person sauna.
Full Spectrum Infrared Heat: Combines UL Listed short wave Spectrum Plus™ infrared heaters with long wave Spectrum Carbon 360° panels for high temperature performance and broad, full body heat coverage.
UL Listed Spectrum Plus™ Heaters: Finnmark's short wave infrared heaters have undergone UL testing and are strategically positioned throughout the cabin for consistent infrared coverage.
Spectrum Carbon 360° Technology: Long wave carbon infrared panels are engineered to provide surrounding infrared warmth throughout the cabin.
Traditional Finnish Sauna Heat: The included Harvia Vega Compact 1900 traditional sauna heater provides higher temperature sauna capability with heated stones and steam.
Steam Capability: Add water to the heated sauna stones according to manufacturer instructions to create bursts of humidity for a classic Finnish sauna experience.
Spectrum Red Light™ LED Panel: Integrated 192 diode LED panel provides 650nm red light alongside selectable chromotherapy within the sauna cabin.
Two Temperature Experiences: Infrared operation reaches temperatures up to 170°F, while traditional sauna operation reaches temperatures up to 190°F.
Low EMF Performance: Low EMF infrared sauna system independently tested by a NASA award winning testing facility, providing an additional level of testing and performance transparency.
High Emissivity Infrared Heaters: Engineered for efficient infrared heat output and consistent performance throughout the cabin.
Antimicrobial Western Canadian Cedar Interior: Naturally aromatic cedar resists mold, bacteria and fungus, helping maintain a clean, fresh sauna environment.
Thermal Plus™ Aspen Exterior: Organically treated with heat and steam for enhanced durability and resistance to rot, warping, decay and chipping.
Built In LCD Touchscreen Controller: Integrated 5 inch V2 LCD touchscreen provides convenient access to sauna controls with Bluetooth connectivity.
Bluetooth Audio: Integrated Bluetooth connectivity allows you to enjoy music, podcasts or other audio during sauna sessions.
Premium HiFi Sound: Built in 6 inch marine grade HiFi speakers provide clear, immersive sound inside the cabin.
8mm Tempered Glass: Premium tempered glass provides durability while supporting excellent thermal retention.
Extra Large Two Tier Bench System: Two levels provide additional seating flexibility and allow users to experience different heat levels within the cabin.
Harvia Vega Compact 1900: Stainless steel, wall mounted 1.9 kW traditional sauna heater, designed, engineered and made in Finland.
Built In Harvia Controls: Ergonomic operating switches can be configured on the right or left side of the heater for installation flexibility.
Sauna Stones Included: Includes the required 29 lb box of Harvia AC3000 sauna stones for the traditional heater.
Harvia Heater Warranty: 2 year manufacturer warranty for consumer use, subject to Harvia's warranty terms and required maintenance.
On Site Assembly Required: Ships as a sauna kit with prebuilt components for on site assembly.
The Trinity Experience
Full Spectrum Infrared: Choose enveloping infrared warmth from Finnmark's combination of Spectrum Plus™ short wave heaters and Spectrum Carbon 360° long wave panels.
Traditional Sauna Heat: Switch to the Harvia Vega traditional heater when you want the higher temperatures and character of a classic Finnish sauna experience.
Steam and Humidity: Water can be added to the properly heated sauna stones according to manufacturer instructions, creating bursts of steam and allowing you to personalize the humidity of your session.
Integrated Red Light: A built in 192 diode LED panel provides 650nm red light within the cabin without requiring separate freestanding equipment.
Chromotherapy: Selectable color lighting adds another customizable element to the sauna environment.
Choose the Experience That Fits the Moment: The Trinity's combination of infrared, traditional heat, steam and integrated lighting lets the sauna experience change from session to session within one cabin.
That, to me, really sells FD 4 without making a single claim about lowering blood pressure, removing toxins, treating pain, collagen production or healing.
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
- Power Supply Unit
- Power Cable
- Interior Heater Connections with Wood Cover
- Door Handle with 2 Screws
- Infrared Sauna Heater Panels
- Harvia Vega Compact 1900 Sauna Heater
- 1 Box Harvia AC3000 Sauna Stones, 29 lbs
- Spectrum Red Light™ 192 Diode LED Panel with 650nm Red Light and Chromotherapy
- V2 5 Inch LCD Touchscreen Controller with Bluetooth
- 6 Inch Marine Grade HiFi Speakers
- 8mm Tempered Glass
- ETL Certification
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Limited Warranty
Specifications
Dimensions & Construction
Model FD-4 Trinity
Capacity 2 Person
Exterior Material Thermal Plus™ Aspen
Interior Material Western Canadian Cedar
Exterior Dimensions 48.8"W × 48.8"D × 83.1"H
Interior Dimensions 44.5"W × 45.1"D × 75.2"H
Door Dimensions 23.63"W × 68.88"H
Upper Bench 44.5"W × 18.9"D
Lower Bench 44.5"W × 15.7"D
Glass 8mm Tempered
Product Weight 437 lbs
Room Volume 86 ft³
Infrared & Traditional Heat
Infrared Maximum Temperature 170°F
Traditional Maximum Temperature 190°F
Traditional Heater Harvia Vega Compact 1900
Traditional Heater Power 1.9 kW
Sauna Stones 29 lbs Included
Red Light 192 Diodes, 650nm
Chromotherapy Included
Infrared Electrical
Voltage 120 V
Power 1750 W
Amperage 15 A
Phase Single
Plug Type NEMA 5-15P
Outlet 120 V, 15 A
Installation & Electrical Requirements
Assembly
Ships as a kit and requires on site assembly
Electrical Sources
Two separate electrical sources required
Infrared System
Requires its own electrical source
Traditional Heater
Requires a separate electrical source
Electrical Installation
Licensed electrician required
Shipping Specifications
Shipping Dimensions 80"W × 40"D × 58"H
Shipping Weight 618 lbs
Shipping
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Free curbside delivery is included with your purchase. Note: On rare occasions, remote or complex delivery areas may not qualify for these rates.
- Due to the size and weight of this sauna, this item ships on a wooden pallet via freight carrier. The driver is responsible for “curbside delivery only” and will lower the items to ground level.
- White glove delivery and in-home placement options may be available upon request.
- Orders typically ship within 3–5 business days. Estimated transit time is 5–10 business days depending on your location.
- A freight carrier will contact you to schedule a delivery appointment before your sauna arrives.
- Please inspect your shipment for any visible damage before signing the delivery receipt. Note any damage on the delivery paperwork prior to accepting.
- Currently shipping to the contiguous United States only.
Installation & Warranty
The Finnmark FD4 Trinity ships as a kit and requires on site assembly. The infrared system and traditional sauna heater require two separate electrical sources. Professional electrical installation is required. Review the installation manual and confirm your space and electrical requirements with a licensed electrician before installation.
