ThermaSol Fortis Outdoor Sauna Cabin - 4-person Architectural Sauna

ThermaSol Fortis Outdoor Sauna Cabin — 4-Person Architectural Sauna

A fully built outdoor sauna cabin combining modern architectural design, traditional heat performance, and all-season durability—designed as a permanent wellness structure for your outdoor space.

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A True Outdoor Sauna Structure

The ThermaSol Fortis is built as a dedicated outdoor wellness cabin, not a modular or compact unit. With its clean architectural lines, premium materials, and insulated construction, it creates a permanent, design-forward sauna environment in your backyard or patio.

Designed for year-round use, it balances performance, durability, and visual impact.

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Why This Sauna Stands Out

• Architectural Glass Facade
  Dark grey tinted glass with aluminum framing for privacy and modern design
• All-Season Insulated Construction
  Multi-layer wood fiber insulation retains heat efficiently
• Traditional Steam Sauna Experience
  Powered by a Harvia Virta heater with sauna stones
• Fully Assembled, Pre-Wired Design
  Simplifies installation compared to traditional builds

Result: a permanent, high-performance outdoor sauna with strong architectural presence

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Built for Durability & Comfort

• Exterior: Thermo-spruce and pinewood construction
• Interior: Thermo spruce walls with thermo aspen benches
• Roofing: Firestone EPDM system for weather protection
• Glass: 8mm Parsol tinted glass for privacy and solar control

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Heating & Control

• Harvia Virta Sauna Heater
  Delivers consistent, traditional high-heat sauna performance
• Harvia Xenio Control System
  Allows precise control of temperature and session timing
• RGB LED Lighting System
  Adjustable ambient lighting for a customized environment

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What This System Enables

• A permanent outdoor sauna installation
• Consistent, high-temperature sauna sessions
• A design-driven backyard wellness centerpiece
• A shared experience for up to four users

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Core Features

• 4-Person Capacity
• Harvia Virta Heater with Sauna Stones
• Architectural Glass Front (8mm tinted)
• Multi-Layer Insulated Construction
• RGB LED Lighting System
• Pre-Wired, Fully Assembled Cabin

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Installation

• Outdoor use only
• Delivered fully assembled and pre-wired
• Electrical connection required
• Professional installation recommended

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Shipping

• Made-to-order lead time: 12–13 weeks
• Freight delivery (USA)

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Important Note

This product is intended for general wellness and relaxation use.