Why choose between infrared and traditional steam when you can have both?

The FD-4 Trinity Sauna brings together three powerful wellness technologies in one space: advanced infrared heating, authentic steam sauna performance, and medical-grade red light therapy. It is designed for those who want flexibility in how they relax, recover, and recharge.

This is not just a sauna. It is a full-spectrum wellness system built for real results.

What Makes It Different

Most saunas force you to choose one method. This one does not.

• Infrared Heat for deep muscle penetration and efficient sweating
• Traditional Steam Heater for high heat and classic sauna intensity
• Red Light Therapy for skin support and recovery

All three work together or independently, depending on how you want to use them.

Deep, Effective Infrared Heating

Equipped with Spectrum Plus™ UL Listed short-wave infrared heaters, this sauna delivers a level of heat that goes beyond surface warmth.

• Penetrates muscles and joints more effectively
• Supports circulation and recovery
• Produces up to 25x more sweat compared to standard carbon panels

This means you feel the results faster, without needing extreme air temperatures.

Authentic Steam Sauna Experience

The included Harvia Vega Compact 1.9kW heater brings the traditional sauna ritual to life.

• Splash water on sauna stones for real steam
• Enjoy higher heat levels and humidity
• Experience the intensity only a true steam sauna can provide

It is the kind of heat that feels immersive, not just warm.

Integrated Red Light Therapy

Built-in Spectrum Red Light™ Therapy adds another layer to your routine.

• 192 diode medical-grade LED panel
• 650nm wavelength for skin and tissue support
• Helps stimulate collagen production

It is a simple addition that can make your sessions feel more complete and restorative.

Premium Materials That Last

This sauna is built with durability and hygiene in mind.

• Interior: Antimicrobial Western Canadian cedar that resists mold and bacteria
• Exterior: Thermal Plus™ Aspen engineered to resist warping, decay, and moisture damage
• Glass: 8mm tempered glass for insulation and durability

Everything is designed to hold up over time while maintaining a clean, natural feel.

Comfortable, Spacious Interior

Relaxation should not feel cramped.

• Extra-large two-tier bench system
• Smooth, supportive seating
• Room to stretch, sit, or recline comfortably

Whether you are using it alone or with others, the space feels open and usable.

Smart Controls & Built-In Audio

Control your entire session with ease.

• LCD Wi-Fi touchscreen control panel
• Bluetooth connectivity
• Integrated Hi-Fi speakers

Adjust heat, lighting, and audio without stepping out.

Engineered for Safety & Performance

• Low EMF design tested by a NASA award-winning facility
• High emissivity infrared heaters for efficient heat transfer
• ETL certified for safety compliance

You get performance without unnecessary risk.

Heater Specifications

• Harvia Vega Compact 1900
• Power: 1.9kW
• Recommended room size: 70–106 cu. ft.
• Stainless steel construction
• Wall-mounted design
• Built-in ergonomic controls
• Flexible left or right-side installation
• Made in Finland

Note: Requires a minimum of 29 lbs of sauna stones. Additional stones are recommended for optimal fit and performance.

What’s Included

Everything you need to get started:

• Full sauna panel system (top, bottom, back, sides, front)
• Tempered glass door with handle
• Infrared heater panels
• Harvia Vega Compact sauna heater
• Sauna stones (29 lbs)
• Spectrum LED lighting and red light therapy system
• Wi-Fi touchscreen controller with Bluetooth audio
• Bench system and supports
• Power supply, cables, and hardware

Warranty

2-Year Limited Warranty (Consumer Use)