Carbon Smart™ Indoor Sauna Room Kit – 5' x 5' x 8'

Overview

The Carbon Smart™ Indoor Sauna Room Kit – 5' x 5' x 8' is a compact, complete interior sauna package designed for residential or commercial indoor installations. The kit includes pre-cut Thermo Poplar interior components, bench materials, an all-glass sauna door, ventilation components, lighting, and essential sauna accessories.

The surrounding room is prepared separately, with the customer providing the framing, insulation, electrical wiring, and exterior wall covering. Carbon Smart™ supplies the specified interior components for the sauna room, helping simplify the installation process.

With an 8-foot recommended ceiling height, customizable bench configurations, and a selection of 6 kW Harvia heater options, this kit is suited to projects where a compact indoor sauna footprint is preferred.

Key Features

• 5' x 5' x 8' Sauna Room Kit – Designed for a compact indoor sauna room installation.
• Thermo Poplar Interior – Features thermally modified Thermo Poplar throughout key interior components.
• Pre-Cut Interior Components – Components are prepared according to the specified room dimensions.
• Customizable Bench Configurations – Choose from available bench layouts shown with the product options.
• All-Glass Sauna Door – Includes an all-glass door with wood handles and trim.
• Foil Vapor Barrier – Included as part of the sauna room interior package.
• Ventilation Components – Includes upper and lower vent grills.
• Thermo Poplar Duckboard Flooring – Includes flooring for the walk area.
• Sauna Accessories Included – Includes a bucket with liner and ladle, thermometer, headrest, and vapor-proof sauna light.
• Installation Instructions – Detailed instructions are included to assist with assembly.
• Multiple 6 kW Heater Options – Choose from six Harvia heater configurations with different control, connectivity, and design features.

Thermo Poplar Construction

The Carbon Smart™ sauna kit uses thermally modified Thermo Poplar for its interior components. The wood is thermally modified at approximately 374°F using a chemical-free modification process.

Thermal modification changes the wood's dimensional characteristics when exposed to variations in temperature and humidity while providing a warm, natural appearance for the sauna interior.

Thermo Poplar is used for:

• 1×4 tongue-and-groove wall boards
• 1×4 tongue-and-groove ceiling boards
• Clear 1×4 bench boards
• Bench supports
• Corner moldings
• Wall, ceiling, and baseboard trim
• Duckboard flooring
• Backrests

What's Included

The Carbon Smart™ Indoor Sauna Room Kit includes:

• Foil vapor barrier
• Thermo Poplar backrests
• 1×4 tongue-and-groove wall boards
• 1×4 tongue-and-groove ceiling boards
• Clear 1×4 Thermo Poplar bench boards
• Bench supports
• 20-inch-deep benches, custom-built according to the selected configuration
• Thermo Poplar corner moldings
• All-glass sauna door
• Wood door handles and trim
• Thermo Poplar duckboard flooring
• Upper and lower vent grills
• Traditional sauna bucket with liner and ladle
• Sauna thermometer
• Headrest
• Marine-grade wall-mount vapor-proof sauna light
• Detailed installation instructions

Sauna Door Specifications

The included all-glass sauna door has the following specifications:

• Frame: 27.2" × 78.7" (690 × 2000 mm)
• Glass: 24.4" × 77.3" (620 × 1963 mm)
• Frame Thickness: 1.65" × 3.6" (42 × 92 mm)
• Required Rough Opening: 28" × 80"

Important: The standard shipment includes an all-glass sauna door. Some product images may show a glass wall for illustration, but the included product is the all-glass door specified above.

Bench Configurations

The kit is available with multiple bench configurations. Available layouts are shown in the product images and use 20-inch-deep clear Thermo Poplar bench boards with supports.

Backrests are shipped flat. If an angled backrest is preferred, spacers can be created during installation to achieve the desired pitch.

Installation Requirements

The Carbon Smart™ kit provides the specified interior sauna components. The surrounding room and supporting construction must be prepared separately.

The customer is responsible for providing:

• Structural framing
• Insulation
• Electrical wiring
• Exterior wall covering

The recommended ceiling height is 8 feet. Contact the manufacturer or seller before ordering if a custom ceiling height is required.

Wall boards are installed in the standard horizontal direction. If the room width exceeds 8 feet, an interior seam will be incorporated where two boards meet to span the additional width.

Sauna Heater Options

The kit offers six 6 kW Harvia heater configurations. Each model provides different control, connectivity, and design features.

Harvia KIP60W 6KW WiFi

• Power Output: 6 kW
• Control Type: WiFi Control
• WiFi Connectivity: Yes
• Heater Stones Included: Yes
• Railing Included: No
• Brand: Harvia
• Model Series: KIP Series
• Model: KIP60W
• Remote Control: App-based via WiFi

Harvia KIP60B 6KW Built-in Control

• Power Output: 6 kW
• Control Type: Built-in Control
• WiFi Connectivity: No
• Heater Stones Included: Yes
• Railing Included: No
• Brand: Harvia
• Model Series: KIP Series
• Model: KIP60B
• Remote Control: Manual only

Harvia Cilindro PC60 6KW Built-in Control

• Power Output: 6 kW
• Control Type: Built-in Control
• WiFi Connectivity: No
• Heater Stones Included: Yes
• Railing Included: No
• Brand: Harvia
• Model Series: Cilindro Series
• Model: PC60
• Remote Control: Manual only

Harvia Cilindro PC60E 6KW WiFi

• Power Output: 6 kW
• Control Type: WiFi Control
• WiFi Connectivity: Yes
• Heater Stones Included: Yes
• Railing Included: No
• Brand: Harvia
• Model Series: Cilindro Series
• Model: PC60E
• Remote Control: App-based via WiFi

Harvia Spirit 6KW WiFi

• Power Output: 6 kW
• Control Type: WiFi Control
• WiFi Connectivity: Yes
• Heater Stones Included: Yes
• Railing Included: No
• Brand: Harvia
• Model Series: Spirit Series
• Model: Spirit
• Remote Control: App-based via WiFi

Harvia Virta 6KW WiFi with Railing

• Power Output: 6 kW
• Control Type: WiFi Control
• WiFi Connectivity: Yes
• Heater Stones Included: Yes
• Railing Included: Yes
• Brand: Harvia
• Model Series: Virta Series
• Model: Virta
• Remote Control: App-based via WiFi

Heater Comparison

Feature	KIP60W 6KW	KIP60B 6KW	Cilindro PC60 6KW	Cilindro PC60E 6KW	Spirit 6KW	Virta 6KW
Power Output	6 kW	6 kW	6 kW	6 kW	6 kW	6 kW
Control	WiFi	Built-in	Built-in	WiFi	WiFi	WiFi
WiFi Connectivity	Yes	No	No	Yes	Yes	Yes
Heater Stones	Yes	Yes	Yes	Yes	Yes	Yes
Safety Railing	No	No	No	No	No	Yes
Remote Control	App-based	Manual	Manual	App-based	App-based	App-based
Brand	Harvia	Harvia	Harvia	Harvia	Harvia	Harvia
Model Series	KIP	KIP	Cilindro	Cilindro	Spirit	Virta
Model	KIP60W	KIP60B	PC60	PC60E	Spirit	Virta

Key Heater Differences

Power Output

All six available heater models have a 6 kW power output.

Control & Connectivity

• KIP60B and Cilindro PC60: Built-in controls with no WiFi connectivity.
• KIP60W, Cilindro PC60E, Spirit, and Virta: WiFi-enabled models with app-based remote control.

Design & Model Series

• KIP Series: Available in WiFi and built-in-control configurations.
• Cilindro Series: Available in standard PC60 and WiFi-enabled PC60E configurations.
• Spirit Series: WiFi-enabled heater option.
• Virta Series: WiFi-enabled option with a protective railing.

Included Accessories

• All six models include heater stones.
• The Harvia Virta 6KW is the only listed model that includes a protective safety railing.

Who It's For

The Carbon Smart™ 5' x 5' x 8' sauna room kit is suitable for homeowners, contractors, spas, gyms, hospitality spaces, and commercial facilities planning a compact indoor sauna installation. It is designed for projects requiring a pre-cut Thermo Poplar interior, configurable benches, glass door, ventilation components, lighting, sauna accessories, and a choice of 6 kW Harvia heater options.

Important Product Notes

• Designed for a 5' × 5' × 8' indoor sauna room.
• An 8-foot ceiling height is recommended.
• Framing, insulation, electrical wiring, and exterior wall covering are not included.
• The standard shipment includes an all-glass sauna door.
• Product images showing glass walls may be for illustration only.
• Bench configurations vary according to the selected option.
• Backrests are shipped flat and may be angled during installation using appropriate spacers.
• Custom ceiling heights should be confirmed before ordering.
• Wall boards are normally installed horizontally.
• An interior seam may be required when the room width exceeds 8 feet.