ThermaSol Fortis 4-Person Outdoor Sauna Cabin, Fully Assembled

The ThermaSol Fortis is an outdoor sauna cabin for 3 to 4 people that arrives fully assembled and pre-wired. A dark grey tinted glass front sits inside a brushed thermo spruce and pinewood shell, with an eave-style roofline that overhangs the entrance slightly.

Build

The front and door are 8 mm Parsol dark grey tinted glass with hidden aluminum framing, which gives privacy and solar protection. The roof is Firestone EPDM, and the walls use multi-layer wood fiber insulation for use through the seasons. Inside, the walls are brushed thermo spruce and the benches are thermo aspen, a heat-treated wood chosen because it resists moisture and stays stable.

Heat and controls

A Harvia Virta 8 kW electric heater with Wi-Fi warms the cabin. It runs from a Harvia Xenio CX45 digital control with Wi-Fi and the MyHarvia app. RGB LED lighting is built in for color light, and two dual-outlet socket boxes provide power access.

What's included

• Pre-assembled sauna cabin
• Harvia Virta 8 kW sauna heater with Wi-Fi
• Harvia Xenio CX45 digital control with Wi-Fi
• Harvia AC3020 sauna stones (3)
• Temperature sensor
• Headrests (2)
• Wood platform
• MyHarvia app
• User manual

Specifications

• Model: 14-FORTIS
• Capacity: 3 to 4 people
• Dimensions: 87.0 x 90.0 x 89.0 in (W x D x H)
• Net weight: 2,161 lb
• Heater: Harvia Virta 8 kW electric, Wi-Fi
• Electrical: 240V single phase, 33.4A heater load, minimum AWG 8 copper supply wire rated 90°C (Harvia Virta 8 kW, per Harvia). Hardwired by a licensed electrician.
• Control: Harvia Xenio CX45, Wi-Fi, MyHarvia app
• Exterior: brushed thermo spruce and pinewood
• Interior: brushed thermo spruce walls, thermo aspen benches
• Front and door: 8 mm Parsol dark grey tinted glass, hidden aluminum framing
• Roof: Firestone EPDM
• Insulation: multi-layer wood fiber
• Bench depth: 24 in
• Lighting: RGB LED color light
• Power access: two dual-outlet socket boxes
• Delivery: fully assembled and pre-wired
• Origin: designed and crafted in the USA
• Order type: made to order

Electrical and site prep

The heater is a Harvia Virta 8 kW electric model. Have a licensed electrician confirm the supply and circuit before the sauna arrives, and plan a level base that can carry the 2,161 lb cabin. Our sauna electrical requirements guide covers what to ask.

Made to order. Made-to-order items are not returnable once ordered.

Related

Browse outdoor saunas and traditional saunas, or read our outdoor sauna buying guide.

Sauna use is intended for general relaxation and wellness. It is not a treatment for any medical condition or a substitute for medical care. If you are pregnant, have a heart condition, low blood pressure, or another health concern, talk with your doctor before use.

We ship to the 48 contiguous U.S. states and Washington, DC. Your shipping cost is calculated at checkout and shown before you pay.

You will get an order confirmation right away and tracking by email when your order ships. Questions about timing for a specific item? Call (945) 280-3243 or email support@restoresuite.com before you order.

Full shipping policy

Large items such as saunas, hot tubs and cold plunge tubs usually ship by freight. The carrier contacts you to schedule delivery. Please check the packaging and note any damage on the delivery receipt before you sign, then tell us within 48 hours so we can resolve it for you.

Before delivery day, measure doorways and hallways along the path to the install spot, and confirm the electrical requirement on the Specifications tab.

30-day limited warranty against manufacturing defects

If this item has a manufacturing defect within 30 days of purchase, contact us with your order number and a photo or video of the issue and we will make it right.

How warranty support works · Returns policy