Name: Thermasol Lumaria Traditional Indoor Sauna
Brand: Thermasol
SKU: 14-LUMARIALDL
Price: 23648.0 USD
Availability: InStock

Thermasol Lumaria Traditional Indoor Sauna

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Manufacturer's Warranty Included

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SKU 14-LUMARIALDL

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The Thermasol Lumaria is a traditional indoor sauna cabin with a floor-to-ceiling panoramic glass facade that extends across two outer walls — bringing natural light and a sense of openness to any home wellness space. Its corner-friendly layout fits neatly into a room corner with left or right entrance configurations available at time of order.

Inside, brushed Tyrol wood walls and thermo-aspen benches create a warm, tactile interior. Multi-layer wood fiber insulation maintains heat efficiently, and integrated LED lighting under the benches and behind the backrests is fully adjustable via remote control. The Harvia Virta 9kW Wi-Fi heater and Harvia Xenio digital control are included in both sizes. Available in Medium (2–3 people) and Large (4–5 people).

Mirrored Assembly Options:

Right Assembly: Glass corner & heater on left side
Left Assembly: Glass corner & heater on right side
Choice needs to be determined when placing your order

Features

Traditional indoor sauna cabin — flat-packed for home assembly
Floor-to-ceiling panoramic glass facade across two outer walls
Corner-friendly layout — fits room corners with left or right entrance options
Brushed Tyrol wood panel walls
Thermo-aspen benches and backrests
Multi-layer wood fiber insulation for energy-efficient heat retention
RGB LED color therapy lighting with remote control — recessed under benches and behind backrests
Available in Medium (2–3 people) and Large (4–5 people)

Specifications

Construction Material

Brushed Tyrol wood panels

Interior Material

Thermo-Aspen

Sauna Heater

Harvia Virta 9kW with Wi-Fi

Sauna Control

Harvia Xenio CX45 with Wi-Fi

Lighting

RGB LED color therapy lighting with remote

Assembly Options

Right assembly: glass corner & heater on left side
Left assembly: glass corner & heater on right side

Large Cabin

Capacity

4–5 people

Dimensions

86.6"W × 86.6"D × 83"H (Bench depth: 24")

Weight

1,543 lb

Shipping Weight

1,764 lb

Medium Cabin

Capacity

2–3 people

Dimensions

86.6"W × 66.9"D × 83"H (Bench depth: 24")

Weight

1,323 lb

Shipping Weight

1,543 lb

What's Included

Flat-packed indoor sauna cabin
Harvia Virta 9kW sauna heater with Wi-Fi
Harvia Xenio CX45 digital control
Harvia AC3020 sauna stones (3 boxes)
Temperature sensor
Headrest (2)
Wood platform
Installation instructions

Manuals & Resources

Lumaria (Large) Installation Manual

Lumaria (Medium) Installation Manual

Lumaria (Large) Spec Sheet

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Trusted by customers for comfort, quality, and lasting peace of mind.

Full Warranty Included

Authorized dealer pricing with manufacturer-backed coverage.

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Reach our team by live chat, phone, or email — M–F, 9am–5pm EST.

Thermasol has been the pioneer of residential steam shower technology since 1947, hand-building steam generators, controls, and outdoor saunas in the United States. Trusted by architects, luxury homebuilders, and hospitality groups for over 75 years, Thermasol equipment is engineered for daily use and backed by industry-leading warranties.

From the PROIII-C and PROIII-D steam generators to the ThermaTouch smart control, Spectra, Solaris, and Fortis outdoor saunas, every Thermasol product is built around a single principle: spa-grade performance that integrates seamlessly into the modern home.

Explore Thermasol

American-Made

Designed and assembled in the USA

Heritage

Wellness pioneer since 1947

Materials

Thermally modified wood, premium hardware

Heating

Harvia electric heater, pre-wired

Placement

Indoor and outdoor models available

Pre-Wired

Factory wiring, electrician required for hookup

Architect-Specified

Trusted by luxury builders worldwide

Warranty

Manufacturer-backed coverage

Frequently Asked Questions

Installation & Placement

How difficult is sauna assembly?

Thermasol saunas arrive with pre-assembled panels and easy-to-follow instructions. Two people and basic tools can complete installation in a few hours. It’s a straightforward, DIY-friendly process.

For the fully assembled and pre-assembled saunas, you need to have a licensed electrician involved for the installation. In most cases, the sauna structure itself arrives pre-built or largely pre-assembled, but the heater will still need to be professionally wired and connected according to local electrical codes.

Depending on the model, installation generally includes:

Placement of the sauna on a proper level surface or foundation
Electrical hookup for the sauna heater and controls
Final connection and testing of the heater
Verifying proper ventilation and safe operating clearances
Ensuring the unit is connected to the correct voltage and breaker size

Some larger or fully assembled units may also require equipment or additional labor to place the sauna in the final installation location due to their size and weight.

Once installed and powered correctly, the sauna is ready for normal operation.

What electrical setup do I need?

Heaters must be hardwired by a licensed electrician, typically requiring 220V power. Exact specifications depend on the heater model. Lighting generally runs on a 110V, 15-amp circuit.

Where should I place an outdoor sauna?

Thermasol outdoor saunas are delivered fully assembled. A forklift or crane is required for placement, and a licensed electrician must install the heater.

The path from delivery point to placement site must be clear and accessible for equipment. Saunas should be installed on a firm, level surface with slight runoff for drainage—such as concrete, decking, pavers, or compacted gravel.

Performance & Sauna Experience

How long does it take for the sauna to heat up?

On average, it takes 40–50 minutes to reach 170°F, depending on heater power and outdoor temperature. ThermaSol saunas are designed for consistent, reliable heat. Warm-up time may vary slightly based on size and location.

How should I use a sauna safely?

Start with shorter sessions and lower heat, gradually increasing as you find your comfort level. Alternate heat with cool-down breaks to avoid overheating. Always listen to your body—if it stops feeling comfortable, it’s time to step out.

How much does it cost to run a sauna?

Thermasol saunas use efficient 240V heaters that draw power only when in use. The cost is comparable to running a clothes dryer or electric oven—typically just cents per session. Turning off the sauna when not in use helps conserve energy.

Delivery & Maintenance

How is the sauna delivered?

All indoor and outdoor saunas are delivered via flatbed trailer and require a forklift or crane for unloading and placement due to their size and weight. Manual offloading may not be applicable—please refer to individual sauna product pages for specific handling requirements. Customers will receive a delivery notice in advance to allow time for proper site preparation.

What's the warranty on Thermasol saunas?

Please refer to the Warranty page for full coverage details.

How do I maintain my sauna?

Wipe down benches regularly, vacuum the interior, and clean glass surfaces. Sit on a towel during use and leave the door open afterward to ventilate. Once a year, remove sauna stones, clean the heater cavity, and replace any cracked stones.

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