Finnmark FD-4 Trinity Infrared & Steam Sauna Combo | 2 Person Home Sauna with Harvia Heater

 

Description

The Finnmark FD-4 Trinity is a premium 2-person 3-in-1 home sauna that combines full-spectrum infrared heat, traditional Finnish steam, and medical-grade red light therapy in one compact indoor system.

This advanced sauna features UL-Listed Spectrum Plus™ infrared heaters, a Harvia Vega Compact 1.9kW traditional sauna heater, and Spectrum Red Light™ therapy — allowing you to experience infrared heat up to 170°F or authentic steam heat up to 190°F.

Designed for serious home wellness in a compact 4x4 footprint, the Trinity FD-4 delivers versatility, performance, and luxury craftsmanship.

3-In-1 Heating Technology

The FD-4 is the only combination sauna in its class integrating certified infrared panels with a true traditional heater.

• UL Listed Spectrum Plus™ short-wave infrared heaters
• Spectrum Carbon long-wave infrared panels
• Harvia Vega Compact 1.9kW traditional heater
• Medical-grade Spectrum Red Light™ therapy panel (192 diode, 650nm)
• Infrared up to 170°F
• Traditional steam up to 190°F
• Splash water onto rocks for authentic steam

Choose infrared, steam, red light therapy, or combine all three for a fully customizable sauna experience.

Traditional Harvia Sauna Heater Included

The Trinity FD-4 includes the Harvia Vega Compact 1900 sauna heater, engineered and manufactured in Finland.

• Wall-mounted stainless steel construction
• 1.9kW electric heater
• Built-in ergonomic controls
• 120V / 1PH operation
• Designed for sauna rooms 70–106 cu. ft.
• Requires minimum 29 lbs of stones
• 2-Year Consumer Warranty

Add water to the stones for a true Finnish steam experience.

Red Light Therapy Integration

Enhance recovery with medical-grade red light therapy.

• 192 diode LED panel
• 650nm red light wavelength
• Combined with chromotherapy
• Supports skin wellness and circulation

Red light therapy complements both infrared and steam sessions for a complete wellness ritual.

Health & Recovery Benefits

Full-spectrum infrared and traditional steam support optimal recovery.

• Deep tissue heat penetration
• Enhanced blood flow
• Promotes detoxification
• Supports muscle recovery
• Encourages relaxation
• Traditional steam intensity for deeper sweating

Short-wave infrared penetrates significantly deeper than carbon-only heaters, delivering a more powerful sweat session.

Premium Materials & Construction

Built for durability and hygiene.

• Antimicrobial Western Red Cedar interior
• Thermal Plus™ Thermo-Aspen exterior
• Double-walled insulated construction
• 8mm tempered glass door with gasket
• Two-tier bench seating
• Low EMF tested

The cedar interior resists mold and odor while the thermo-treated exterior resists warping and decay.

Illumination & Smart Controls

Modern control technology enhances convenience.

• Built-in LCD Wi-Fi touchscreen controller
• Bluetooth audio system
• 6” Hi-Fi speakers
• Spectrum LED near infrared ceiling lights
• ETL Certified components

Control temperature, lighting, and audio from the integrated control panel.