FD-4 Trinity Infra-Steam Combination Sauna | Finnmark Designs

The Finnmark Designs FD-4 Trinity Infra-Steam Sauna is the only sauna in the world that combines three wellness modalities in a single unit: UL Listed Spectrum Plus™ infrared heaters, a Harvia Vega 1.9kW traditional steam heater with sauna stones, and medical-grade red light therapy. All three systems run on 120V and plug into a standard home outlet — no electrician needed.

Key Features

• 3-in-1 Combination System — The only sauna with UL listed infrared heaters, a traditional steam stone heater, and medical-grade red light therapy in one unit.
• UL Listed Spectrum Plus™ Infrared — Short-wave infrared penetrates up to 25× deeper than carbon panels for maximum therapeutic benefit.
• Harvia Vega 1.9kW Steam Heater — Wall-mounted Finnish-made heater for traditional steam on 120V — no electrician required.
• Spectrum Red Light™ Therapy — 192-diode medical-grade LED panel at 650nm with full-color chromotherapy.
• Plug-In Ready — All three systems run on standard 120V.
• Antimicrobial Cedar Interior — Western Canadian cedar resists mold, bacteria, and fungus.
• Thermal Plus™ Aspen Exterior — Heat-treated to never rot, warp, decay, or chip.
• V2 LCD Controller — 5" touchscreen with Bluetooth audio and 6" marine-grade HiFi speakers.
• Low EMF — Tested by a NASA award-winning testing facility.
• Built for a Lifetime — 10-Year Warranty — One of the strongest warranties in the infrared sauna industry, covering structure, heaters, and electrical.
• 4-Inch Thick Walls — The thickest insulation in the industry delivers the highest infrared temperatures and maximum heat retention.
• Mechanical Ventilation — Built-in ventilation system ensures consistent air circulation for enhanced heat quality and a more comfortable session.

Specifications

• Capacity: 2 Person
• Exterior Dimensions: 48"W × 48"D × 83"H
• Interior Dimensions: 45.2"W × 44.5"D × 75.5"H
• Exterior Material: Thermal Plus™ Canadian Aspen
• Interior Material: Antimicrobial Western Red Cedar
• Infrared Output: 1.7kW (1,750W)
• Traditional Heater: Harvia Vega Compact 1.9kW (120V, wall-mounted)
• Electrical: 120V / 15.9A (standard outlet)
• Glass: 8mm Tempered with Gasket
• Room Volume: 86 cu. ft.
• SKU: FD-KN004
• Brand: Finnmark Designs
• Wall Thickness: 4 inches

Warranty

Every Finnmark sauna is backed by a 10-Year Warranty — one of the most comprehensive in the industry. This covers the structure, heaters, and electrical components. Purchase from an authorized dealer (like Wellness Matrix USA) to ensure full warranty coverage.

Shipping

Free shipping in lower 48.