Finnmark FD-5 Trinity XL 4-Person Home Infrared & Steam Sauna Combo [FD-KN005] (SAK37258)

Finnmark FD-5 Trinity XL 4-Person Indoor Infrared & Steam Sauna Combo — FD-KN005

This is a 4-person indoor sauna combining full spectrum infrared heat, traditional steam, and red light therapy in a single cabin. The FD-5 Trinity XL is built with antimicrobial Western Red Cedar interior and a Thermal Plus Aspen exterior, manufactured in Finland. It includes UL-listed Spectrum Plus infrared heaters, a 4.5kW steam heater, Spectrum Red Light Therapy panels, an LCD touchscreen controller, Bluetooth audio with two 6" marine-grade speakers, and a two-tier bench configuration.

Why This Infrared & Steam Sauna Combo

• Three modalities in one cabin — full spectrum infrared (Carbon 360 long-wave + Spectrum Plus short-wave), traditional 4.5kW steam, and Spectrum Red Light Therapy panels; switch between modes or combine them.
• Built for four people — 71"W × 57.5"D × 75"H interior with a two-tier bench: top bench 71" × 22", lower bench 71" × 16".
• Built from premium wood — antimicrobial Western Red Cedar interior paired with rot- and warp-resistant Thermal Plus Aspen exterior.
• Built for indoor installation — insulated walls, tongue-and-groove construction, and adjustable leveling feet accommodate standard home interiors including uneven floors.
• Built with high thermal retention — 8mm tempered glass maximizes heat retention efficiency.

Key Features

• Infrared heaters — Carbon 360 long-wave panels + Spectrum Plus short-wave panels; UL listed; low EMF/ELF
• Steam heater — 4.5kW traditional steam heater
• Red light — Spectrum Red Light Therapy panels
• Interior wood — Western Red Cedar (antimicrobial)
• Exterior wood — Thermal Plus Aspen (rot and warp resistant)
• Construction — tongue and groove; insulated walls
• Glass — 8mm tempered
• Bench — two-tier; top bench 71" × 22", lower bench 71" × 16"
• Controls — built-in LCD touchscreen
• Audio — Bluetooth connectivity; two 6" HiFi marine-grade speakers
• Feet — adjustable leveling feet
• Power — 240V / 3,150W / 15A dedicated circuit required (infrared heaters); additional circuit may be required for steam heater — refer to User Manual

Specifications

Installation and Setup

• Use: indoor installation
• Electrical: infrared heaters require a dedicated 240V / 15A circuit at 3,150W; steam heater electrical requirements are separate — refer to the User Manual for complete wiring specifications before installation
• Flooring: adjustable leveling feet accommodate uneven surfaces; verify floor load capacity before installation
• Assembly: refer to the User Manual linked below for full assembly instructions

Shipping and Returns

• Shipping: free standard shipping within the United States. See our Shipping Policy for delivery windows and full details.
• Returns: 30-day return window; item must be unused and in original packaging. Damage must be reported within 48 hours of delivery. A 25% restocking fee applies to approved returns. See our Return Policy for full details.

Common Questions

What modalities does the Finnmark FD-5 Trinity XL include?
The FD-5 Trinity XL combines three modalities: full spectrum infrared (Carbon 360 long-wave and UL-listed Spectrum Plus short-wave heaters), traditional steam via a 4.5kW steam heater, and Spectrum Red Light Therapy panels. Each can be used independently or in combination.

What electrical connection does the FD-5 require?
The infrared heaters require a dedicated 240V / 15A circuit at 3,150W. The steam heater has separate electrical requirements. Refer to the User Manual for complete wiring specifications and consult a licensed electrician before installation.

What are the interior dimensions of the FD-5 Trinity XL?
The interior measures 71"W × 57.5"D × 75"H with a two-tier bench: top bench 71" × 22", lower bench 71" × 16", accommodating up to 4 persons.

What is the return policy?
Serene Lifestyle Co accepts returns within 30 days of delivery. The item must be unused and in its original packaging. Damage must be reported within 48 hours of delivery. A 25% restocking fee applies to approved returns. See our Return Policy for full details.

Where is the Finnmark FD-5 Trinity XL manufactured?
The FD-5 Trinity XL is manufactured in Finland.

Manuals

Brochure (PDF) — Spec Sheet (PDF) — User Manual (PDF)

Safety and Electrical Notice

Installation must comply with local electrical and building codes. This unit requires multiple electrical circuits; consult a licensed electrician before installation. Serene Lifestyle Co recommends professional installation where indicated in the product documentation. Specifications are provided by the manufacturer; verify site requirements before purchase.

The information presented on this page is for general wellness and educational purposes only. Statements regarding products sold by Serene Lifestyle Co have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare provider before beginning any new wellness routine, especially if you are pregnant, nursing, or have a pre-existing medical condition.