FD-5 Trinity XL Infra-Steam Combination Sauna | Finnmark Designs

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The Finnmark Designs FD-5 Trinity XL is the large-format version of the award-winning Trinity combination sauna — combining UL Listed Spectrum Plus™ infrared heaters, a Harvia KIP 4.5kW traditional steam heater, and medical-grade red light therapy in one spacious 4-person unit. It delivers every wellness benefit available — deep infrared penetration, authentic steam from real sauna stones, and 650nm red light therapy — all in a single session.

Key Features

• 3-in-1 Combination System — Infrared, traditional steam, and medical-grade red light therapy in one XL sauna.
• UL Listed Spectrum Plus™ Infrared — 2.7kW of short-wave infrared with up to 25× deeper penetration than carbon panel heaters.
• Harvia KIP 4.5kW Steam Heater — Finnish-engineered UL listed heater with exceptional rock capacity for powerful steam sessions.
• Spectrum Red Light™ Therapy — 192-diode medical-grade LED panel at 650nm plus full-color chromotherapy.
• Spacious 4-Person Layout — Extra-large two-tier bench system with 72" of bench width.
• 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: 4 Person
• Exterior Dimensions: 72"W × 48"D × 83"H
• Interior Dimensions: 68.5"W × 45.2"D × 75.5"H
• Exterior Material: Thermal Plus™ Canadian Aspen
• Interior Material: Antimicrobial Western Red Cedar
• Infrared Output: 2.7kW (2,700W)
• Traditional Heater: Harvia KIP 4.5kW (240V, UL listed)
• Electrical: 240V / 18.8A
• Glass: 8mm Tempered with Gasket
• Room Volume: 130 cu. ft.
• SKU: FD-KN005
• 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.