Finnmark FD-4 Trinity Infrared & Steam Sauna Combo

Finnmark FD-4 Trinity Infrared & Steam Sauna Combo


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SKU FD-KN004 Category

The Finnmark FD-4 Trinity Infrared & Steam Sauna Combo brings an unparalleled sauna experience right to your home. Designed for two, this sophisticated model combines the therapeutic benefits of Finnmark’s UL listed Spectrum Plus infrared heaters with the traditional heat of a 120V sauna heater, enveloped within a cabin that also offers medical-grade Spectrum Red Light™ Therapy. The FD-4 Trinity represents the epitome of sauna technology, allowing users to enjoy the penetrating warmth of infrared, the moist heat of a steam sauna, and the rejuvenating effects of red light therapy all in one. Tailored for those who seek a comprehensive wellness solution, this sauna is a marvel of design and functionality, crafted from the finest materials for durability and health safety.



  • Hybrid Heating Technology: Combines the deep penetration of Spectrum Plus™ short-wave infrared heaters with a traditional sauna heater for a full spectrum of heat experiences.
  • Red Light Therapy: Features a 192 diode medical-grade LED panel producing 650nm red light, enhancing skin health, and muscle recovery with chromotherapy options.
  • Superior Materials: Interior crafted from antimicrobial Western Canadian cedar and an exterior of Thermal Plus™ Aspen, which resists rotting and decay.
  • Optimized Control and Comfort: Equipped with a V2 LCD 5″ touchscreen controller with Bluetooth, ergonomic two-tier benches, and 6″ HiFi marine-grade speakers.
  • Safety and Quality: Includes 8mm tempered glass with gasket for retention, low EMF emissions tested by NASA accredited facility, ensuring a safe and enjoyable sauna experience.
  • Dual Heating Capacity: Reaches a maximum temperature of 170°F with infrared and 190°F with the traditional heater, quickly and efficiently.



  • Model: FD-4
  • Exterior Materials: Thermo-Aspen
  • Interior Materials: Western Red Cedar
  • Dimensions: 48″W x 48″D x 83″H (exterior); 44.25″W x 45.5″D x 75.5″H (interior)
  • Electrical Specs: 120 Volts, IR 1750 Watts, traditional 1.9kW, Amperage 15/20, NEMA 5-15P plug
  • Maximum Temperature: IR 170°F, Traditional 190°F
  • Room Volume: 86 cu. ft.
  • Certifications: ETL Certified
  • Weight: Product weight 437 lbs; Shipping weight 485 lbs including pallet
  • Sauna Heater: Harvia Vega Compact 1900, 1.9kW, for rooms from 70 to 106 cu. ft., requires a minimum of 29 lbs of sauna stones
  • Additional Features: Built-in controls, adjustable ergonomic switches, can be installed on either side of the heater.


Resources:               Installation Manual           Finnmark ETL           Finnmark Certification            Warranty Test Log Designs          Harvia Sauna Stones Update           Heater Installation Manual

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