Modern Indoor Sauna Design with Semi-Panoramic Glass

The ThermaSol Astra combines a refined contemporary design with traditional electric sauna heating in a spacious indoor cabin for 3–4 people.

Its clean-lined corner configuration pairs Brushed Tyrol wood wall panels with Thermo-Aspen benches and backrests and transparent semi-panoramic glass panels. Integrated RGB LED color lighting provides adjustable ambiance, while the 9kW Harvia Virta heater with Wi-Fi-enabled digital controls delivers the heat for traditional sauna sessions.

The Astra is supplied as a flat-packed, unassembled cabin and measures approximately 85.4" L × 85.4" W × 83" H when assembled. Its listed assembled weight is approximately 1,323 lbs, so the installation area and delivery route should be planned carefully.

Why You'll Love It

3–4 Person Capacity

The Astra is designed to accommodate 3–4 people, making it suitable for shared home sauna sessions or for customers who want additional space when using the cabin alone.

Semi-Panoramic Glass Design

Transparent glass panels create a more open visual profile while maintaining the enclosed sauna environment. The corner-oriented layout is designed to integrate naturally into modern interiors.

Brushed Tyrol Wood Interior

The sauna uses Brushed Tyrol wood panels for its wall construction, providing a modern wood finish with visible natural texture.

Thermo-Aspen Benches & Backrests

The benches and backrests are made from thermally modified Aspen, selected for use in the sauna environment and designed to resist moisture and warping.

9kW Harvia Virta Heater

The Astra is specified with a 9kW Harvia Virta electric sauna heater operating at 240V, single phase. The Virta uses a freestanding design and is intended for traditional sauna operation.

Wi-Fi-Enabled Digital Controls

The current Astra specification identifies Wi-Fi-enabled digital controls, providing convenient temperature and sauna-management functionality.

RGB LED Color Therapy Lighting

Integrated RGB LED lighting allows users to customize the visual ambiance of the sauna with a dedicated remote-controlled lighting system.

Multi-Layer Wood-Fiber Insulation

The Astra uses multi-layer insulation made with wood fibers, designed to support heat retention within the cabin.

Corner-Friendly Layout

The Astra's corner configuration is designed to make efficient use of room geometry while creating a wide front-facing glass presence.

Spacious 85.4" Square Footprint

The assembled Astra measures approximately 85.4" × 85.4" × 83", creating a substantial but clearly defined footprint for a dedicated home sauna room.

Approximately 24" Bench Depth

The manufacturer's specification sheet lists an approximate 24" bench depth, providing practical seating space for a multi-person sauna.

Traditional Finnish Sauna Operation

The Harvia Virta heater supports the traditional Finnish löyly experience, allowing water to be added to heated sauna stones to create humidity according to the heater manufacturer's instructions.

Made in the USA

ThermaSol's Astra specification sheet identifies the sauna as a Made-in-USA product.

Designed for Elevated Home Wellness Spaces

The Astra is designed for customers who want a larger indoor sauna with a contemporary architectural appearance.

Its semi-panoramic glass, corner configuration, Brushed Tyrol wood walls, and Thermo-Aspen seating give it a polished appearance suited to primary suites, home gyms, spa-style bathrooms, fitness rooms, and dedicated wellness environments. ThermaSol's specification sheet specifically identifies these types of applications.

Because the cabin weighs approximately 1,323 lbs assembled and ships flat-packed, customers should plan both the delivery route and installation site before ordering.

Product Specifications

Product Information

• Brand: ThermaSol
• Model: Astra Sauna Cabin
• Manufacturer SKU: 14-ASTRADL / 14-ASTRADR
• Product Type: Indoor traditional electric sauna cabin
• Capacity: 3–4 people
• Configuration: Left or right assembly
• Installation: Indoor
• Construction: Brushed Tyrol wood panels
• Benches/Backrests: Thermo-Aspen
• Glass: Transparent semi-panoramic glass
• Lighting: RGB LED color therapy
• Assembly: Flat-packed / unassembled

Dimensions

• Exterior: 85.4" L × 85.4" W × 83" H
• Approximate Bench Depth: 24"
• Assembled Weight: 1,323 lbs
• Shipping Weight: 1,543 lbs

Heating System

• Heater: Harvia Virta
• Power: 9kW
• Voltage: 240V
• Phase: Single phase
• Heater Type: Traditional electric sauna heater
• Stone Capacity: Approximately 120–160 lbs depending on stone selection/quantity

Controls & Lighting

• Wi-Fi-enabled digital heater controls
• RGB LED color-therapy lighting
• Remote-controlled lighting
• Traditional sauna temperature control

Construction & Insulation

• Brushed Tyrol wood panel interior walls
• Thermo-Aspen benches and backrests
• Transparent semi-panoramic glass panels
• Multi-layer wood-fiber insulation
• Corner-style floor plan

What's Included

The ThermaSol Astra specification identifies the following primary components:

• Astra sauna cabin
• Brushed Tyrol wood wall panels
• Thermo-Aspen benches and backrests
• Transparent semi-panoramic glass panels
• RGB LED color-lighting system with remote
• 9kW Harvia Virta heater
• Wi-Fi-enabled digital control system
• Multi-layer wood-fiber insulation
• Flat-packed cabin structure

Important

The Harvia Virta heater's current ThermaSol listing indicates that sauna stones are not included with the heater. The quantity listed in the specifications refers to the heater's stone capacity, not necessarily stones supplied with the Astra cabin.

Optional Add-Ons

Sauna Stones

The Harvia Virta heater requires sauna stones for traditional stone-heating operation. ThermaSol's current Harvia Virta page states that stones are not included with the heater, so they should be treated as a separate purchase unless the Wellness Edge Frontier package specifically includes them.

Control System

The Astra specification sheet identifies Wi-Fi-enabled digital controls as part of the heater configuration. The current ThermaSol heater page notes that the Xenio control kit is required for operation and sold separately when the Virta heater is purchased as an individual component. For a complete Astra cabin package, the exact included control hardware should be confirmed against the WEF SKU.

Shipping & Installation

The Astra is supplied unassembled and flat-packed, rather than fully assembled. ThermaSol's specification sheet states that the sauna ships via flatbed and that customers are notified approximately two weeks in advance to prepare the site. A forklift or capable crew is required for off-loading, and the customer is responsible for coordinating the necessary equipment and unloading.

The assembled dimensions are approximately 85.4" × 85.4" × 83", with a listed assembled weight of approximately 1,323 lbs and shipping weight of approximately 1,543 lbs.

The 9kW Harvia Virta heater requires 240V single-phase power. ThermaSol's heater information indicates that wiring and control requirements must follow the heater installation documentation. Electrical installation should be completed by a qualified electrician in accordance with local codes.

The manufacturer identifies the Astra for indoor applications such as primary suites, fitness rooms, spa bathrooms, and boutique wellness environments.

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Frequently Asked Questions

What is the ThermaSol Astra?

The Astra is a 3–4 person indoor traditional electric sauna cabin combining Brushed Tyrol wood walls, Thermo-Aspen benches, transparent semi-panoramic glass, RGB LED lighting, and a 9kW Harvia Virta heater.

How many people can use it?

The Astra is designed for 3–4 people.

Is the Astra an infrared sauna?

No. The Astra is a traditional electric sauna using a Harvia Virta heater and sauna stones.

What type of heater does it use?

The Astra uses a 9kW Harvia Virta electric sauna heater.

What are the electrical requirements?

The heater is specified for 240V, single-phase power. A qualified electrician should handle installation in accordance with local electrical requirements.

Does the heater support steam or humidity?

Yes. The Harvia Virta supports the traditional Finnish sauna practice of adding water to heated stones to introduce humidity, following the heater manufacturer's instructions.

Are sauna stones included?

The current Harvia Virta heater page states that sauna stones are not included with the heater. Confirm whether the exact WEF Astra package includes stones before listing them as included.

What type of wood is used?

The walls use Brushed Tyrol wood panels, while the benches and backrests use Thermo-Aspen.

Does the Astra have glass panels?

Yes. It has transparent semi-panoramic glass panels in its front/corner configuration.

Does it have color lighting?

Yes. The Astra includes integrated RGB LED color therapy lighting with a remote control.

Does it have Wi-Fi controls?

Yes. The current Astra specification identifies Wi-Fi-enabled digital controls for the heater.

What are the dimensions?

The assembled sauna measures approximately 85.4" L × 85.4" W × 83" H.

How much does it weigh?

The listed assembled weight is approximately 1,323 lbs, with a shipping weight of approximately 1,543 lbs.

Is the sauna delivered assembled?

No. The Astra is supplied flat-packed and unassembled for on-site installation.

How is it delivered?

ThermaSol's specification sheet states that the Astra ships via flatbed, with advance notice provided to prepare the site. A forklift or capable unloading crew is required.

Can I choose the door orientation?

Yes. The Astra is offered in left or right assembly configurations, corresponding to the two manufacturer SKUs.

Where is the Astra made?

The ThermaSol specification sheet identifies the Astra as Made in the USA.

What types of rooms is it suited for?

ThermaSol identifies applications including primary suites, fitness rooms, spa bathrooms, and boutique wellness environments.

What is the bench depth?

The manufacturer's specification sheet lists an approximate 24" bench depth.

What is the heater's stone capacity?

The Harvia Virta 9kW configuration supports approximately 120–160 lbs of sauna stones, depending on the specific stone selection and quantity. Stones are not included with the standalone Virta heater.

Does it require a dedicated circuit?

Because the heater is 9kW at 240V, electrical installation must follow the applicable Harvia/ThermaSol installation requirements and local electrical code. A qualified electrician should verify the required circuit and wiring before installation.

What is the maximum temperature?

The current ThermaSol Astra specification sheet does not publish a specific maximum cabin temperature. I would not add an unsupported temperature figure to the WEF listing.

What is the warranty?

The current ThermaSol Astra product information available for this listing does not clearly state a complete warranty term. I recommend confirming the warranty attached to the exact WEF SKU before publication.