PRE-ORDER FOR AUGUST 2026

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2-Person Home Sauna with Infrared & Traditional Heat 48"W x 48"D x 78"H 

The Trinity Combination Sauna is the only sauna available that combines Finnmark’s UL listed Spectrum Plus infrared heaters combined with a Harvia Vega 120V traditional heater, plus true medical grade 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 Harvia Vega heater are all powered by 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 Harvia Vega 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.

FEATURES

• 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 
  
• Harvia Vega Compact 1900
  
• Wall-mounted design
  
• Stainless Steel construction
  
• 1.9kW
  
• For sauna rooms from 70 to 106 cu. ft. 
  
• Requires a minimum of 29 lbs of sauna stones (1 Box-AC3000)
  
  • 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). 
    
• Built-in controls
  
• Ergonomic operating switches
  
• Switches can be installed on the right or left side of the heater
  
• Designed, engineered, and made in Finland
  
• Dimensions: 11""W (279mm) x 11""D (279mm) x 21"" (533mm)
  
• 2-Year Warranty (Consumer use)
  
  • Manufacturer's Note: Sauna heater stones are significant to the unit's safety. In order for the warranty to remain valid, the user is responsible for proper maintenance.
    

WELLNESS BENEFITS

• The technology of the Spectrum Plus incoloy 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.