FinnMark Designs

Finnmark FD-4 Trinity Infra-Steam 2 Person Sauna


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Price: $7,795.00
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Enjoy the Benefits of Infrared Sauna Bathing at 170-degrees Fahrenheit!


The Trinity Combination Sauna is the only sauna available that combines Finnmark’s UL listed Spectrum Plus infrared heaters combined with a traditional 120V sauna heater, plus true medical grade Spectrum Red Light™ Therapy.No need to compromise.

Finnmark’s FD-4 Trinity is the only combination sauna with true UL listed infrared heaters together with a traditional sauna heater. Furthermore, the IR panels, red light therapy, and the traditional sauna heater are all powered by a standard 120V and can be plugged into a common outlet, so no electrician is needed. Get all the benefits of infrared combined with traditional rocks with steam.Get hot fast! The only IR heaters that have passed the rigorous tests from Underwriter Laboratories used in tandem with a traditional steam sauna stove. Short wave far-infrared penetrates muscles, joints, and makes you sweat 25 times more than carbon panel heaters.

The traditional 1.9kW sauna heater lets you splash some water onto the rocks for a luxurious steam sauna experience. Reap the benefits and the intensity only offered by a steam sauna.Red light therapy is a type of phototherapy that uses low-level light wavelengths to penetrate the skin and stimulate the production of collagen and other proteins, which can lead to numerous potential health benefits. It’s a perfect enhancement to your sauna wellness ritual.

Traditional Sauna Heater Included


 Spectrum Plus™ UL Listed short wave infrared heaters for deep penetrating heat, up to 25x more than standard carbon panel heaters.

 Spectrum Red Light™ Therapy. 192 Diode medical grade LED panel capable of producing highly beneficial 650nm of red light therapy combined with chromotherapy for those days you need a little love.

 Antimicrobial Western Canadian cedar interior that protects against mold, bacteria and fungus.

 Thermal Plus™ Aspen exterior that will never rot, warp, decay or chip. Making FinnMark Design's full spectrum infrared saunas one of the healthiest and longest lasting saunas on the market.

 3-IN-ONE Combination. Compromise no more. Introducing the only combination sauna with true UL listed infrared heaters combined with a traditional heater that produces high heat steam. Get all the benefits of infrared combined with traditional rocks with steam all while soaking in the benefits of a medical grade Red light therapy LED panel.

 Built-in LCD touchscreen controller with Bluetooth audio.

 Audio with 6" HiFi marine grade speakers, 8mm tempered glass for the ultimate thermal retention.

 Extra large two-tier bench system

 Low EMF sauna tested by a NASA award winning testing facility.

 High Emissivity infrared heaters

Health Benefits

 The technology of the Spectrum Plus incology heaters warms your core body temperature, producing a cleaner, healthier sweat while lowering blood pressure, and maintaining heart health.

 The natural heat produced by the Spectrum Plus heaters is designed to achieve a more controlled hot climate much like a traditional sauna without the unbearable heat temperatures. This deeper penetration through sweating goes beyond the muscle and fat rather than a traditional or hot air sauna.  As a result, you're able to work up the best possible sweat in the least amount of time.

 Spectrum Plus heaters remove 17% more toxins such as cholesterol, fat-soluble toxins, toxic heavy metals, sulfuric acid, sodium, ammonia and uric acid.

 Full Spectrum Sauna combination of long-wave Spectrum Carbon 360 infrared panels with UL-listed short-wave Spectrum Plus™ infrared panels. This combination provides higher temperatures, full body coverage, deeper penetration, and better experience than any other sauna.

 Reap the benefits of a more natural pain relief remedy with every infrared sauna session.

 Athletes can appreciate a faster muscle recovery with increased blood flow to the muscles, delivering more concentrated oxygen and creating more energy to heal.

  • 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 (2 Screws)
  • Infrared Sauna Heater Panels
  • Harvia Vega Compact 1900 Sauna Heater
  • 1 Box of the Harvia AC3000 0-10cm sauna stones (29 lbs)
    • Please note that each natural stone is unique in shape and size. We recommend purchasing an additional box of sauna stones to allow you to choose the highest quality of stone for fit, form, and function (Additional freight charges will apply).
  • Medical Grade LED Red light therapy with 650nm plus color chromotherapy  
  • V2 LCD Controller 5" Touchscreen with Bluetooth 
  • ETL Certification
  • Limited Warranty

External Materials


Interior Materials

Western Canadian Cedar









Plug Type

NEMA 5-15P


Standard 120v 15a

Maximum Temperature

IR 170F - Traditional 190F

Interior Dimensions

44"W x 45'D x 75"H

Exterior Dimensions

48"W x 48"D x 83"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 w/ Gasket

Product Weight

437 lbs

Shipping Dimensions

36"W x 80"D

Shipping Weight

485 lbs W/48 lb Pallet


Shipping of this IR sauna room is FREE to the contiguous 48 states!The weight or packaging of this product requires delivery by special appointment and on a wooden pallet.The driver is responsible for curbside delivery “only” and will lower the items to ground level.Prior to shipping this product, we contact customers to share shipment details and discuss any extenuating delivery circumstances that may complicate or cause additional delivery expenses.Our goal is to ensure your project's success


Installation and Operation Manual

EMF Test


Finmark Certification

ETL Certification

Harvia Vega Installation and Operation Manual

Harvia Sauna Stones Update


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