Finnmark FD-5 Trinity XL Infrared & Steam Sauna Combo (4-Person)

Meet the Finnmark FD-5 Trinity XL, the ultimate 3-in-1 home sauna that brings together the best of every heat therapy — infrared, traditional Finnish steam, and medical-grade red light therapy — in one stunning, spacious design.

Engineered for up to four people, the FD-5 blends Finnmark’s UL-Listed Spectrum Plus™ infrared technology with a powerful 4.5kW Harvia KIP Series B heater and Spectrum Red Light™ Therapy to deliver the most complete sauna experience available today.

The result? Deep detoxifying heat, authentic steam sessions, and rejuvenating red-light phototherapy — all in a handcrafted cabin built from antimicrobial Western Canadian cedar and long-lasting Thermal Plus™ Aspen. Whether you’re recovering from workouts or indulging in daily relaxation, the FD-5 Trinity XL delivers unmatched luxury, performance, and wellness versatility.

• 3-in-1 Full-Spectrum Sauna: Combines UL-Listed Spectrum Plus™ infrared heaters, a Harvia KIP Series B 4.5kW steam heater, and Spectrum Red Light™ Therapy for total-body rejuvenation.

• Infrared + Steam Synergy: Experience deep-tissue infrared heat while enjoying the rich humidity of a Finnish steam sauna — all in one cabin.

• True Red Light Therapy: 192-diode LED panel provides 650nm medical-grade red light for collagen stimulation, cellular recovery, and chromotherapy benefits.

• Powerful Harvia KIP Heater: Finnish-engineered, stainless-steel heater with built-in controls, direct rock-to-element contact, and exceptional rock capacity for even heat and steam.

• Premium Materials: Western Canadian cedar interior resists bacteria and odor; Thermal Plus™ Aspen exterior is eco-treated to prevent rot, warp, and decay.

• Luxury Comfort: Extra-large, two-tier bench system for multiple users.

• Smart Connectivity: Integrated Wi-Fi LCD touchscreen with Bluetooth audio and 6” Hi-Fi speakers for a premium experience.

• Low-EMF Certified: Independently tested by a NASA-award-winning lab for verified low emissions.

• Built to Last: Non-toxic wool insulation and double-walled construction ensure durability and thermal efficiency.

• Modular sauna panels: bottom, top, back, front, left, right

• 8mm tempered glass door with cedar handle

• Bench supports and two-tier bench top

• Heater and floor cables

• Power supply unit and power cable

• Interior heater connections with wood cover

• Harvia KIP Series B 4.5kW Sauna Heater

• 1 Box of Harvia AC3000 Sauna Stones (44 lbs)

• Spectrum Plus™ infrared panels

• Spectrum Red Light™ Therapy LED panel

• Controller 2.0 built-in Wi-Fi touchscreen with Bluetooth audio

• Dual 6” Hi-Fi speakers

• Spectrum LED near-infrared ceiling lights with chromotherapy

• ETL certification and limited warranty documentation

Traditional Heater Details (Harvia KIP45B)

Manual Links:

• Finnmark Warranty (PDF)
• Finnmark FD-5 Spec Sheet (PDF)
• Finnmark FD Trinity IOM Owners Manual (PDF)
• Finnmark V2 WIFI Control IOM Owners Manual (PDF)
• Finnmark FD-5 Dimensions Diagram (PDF)