




Carbon Smart Saunas - 8' x 9' x 8' - by Finnish Sauna Builders
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Carbon Smart™ Indoor Sauna Room Kit – 8' x 9' x 8'
The Carbon Smart™ Indoor Sauna Room Kit is a premium custom sauna solution designed to bring authentic relaxation, warmth, and wellness into your home or commercial space. Thoughtfully developed for both DIY enthusiasts and professional contractors, this complete indoor sauna package includes the essential interior components needed to create a refined and high-performing sauna environment.
Precision-cut to fit your room dimensions, this sauna kit is designed to simplify the building process while delivering a clean, built-in appearance. You provide the framing, insulation, electrical wiring, and exterior wall covering, and Carbon Smart™ supplies the premium interior package. From wall and ceiling boards to benching, vapor protection, ventilation, and accessories, each element is selected to support a beautiful and functional sauna experience.
Crafted exclusively from Thermo Poplar, this sauna kit offers a warm, sophisticated look with enhanced dimensional stability and improved resistance to humidity and temperature variation. With customizable bench configurations, an all-glass sauna door, duckboard flooring, ergonomic backrests, and essential sauna accessories included, this Carbon Smart™ kit creates a modern wellness retreat tailored to your space and lifestyle.
Key Features
- Custom Indoor Sauna Kit: Interior components are precisely cut and prepared for your room dimensions to support a streamlined installation process.
- Premium Thermo Poplar Construction: Built exclusively with thermally modified Thermo Poplar for a rich appearance, improved stability, and excellent indoor sauna performance.
- Carbon Smart™ Wood Sourcing: Responsibly sourced materials support carbon-smart forestry practices while delivering a beautiful, durable sauna interior.
- Authentic Sauna Experience: Designed to create a comfortable and immersive indoor sauna environment for relaxation and everyday wellness routines.
- Custom Bench Configurations: Bench layout options allow you to choose the arrangement that best fits your room and seating preferences.
- Complete Interior Package: Includes wall and ceiling boards, bench boards with supports, corner moldings, duckboard flooring, ventilation grills, and essential accessories.
- All-Glass Sauna Door: Features a modern all-glass door with wood handles and trim for a bright, open, and elegant finish.
- Built-In Moisture Protection: Foil vapor barrier helps support proper moisture management within the sauna enclosure.
- Comfort-Focused Details: Includes ergonomic backrests, headrest, thermometer, bucket with liner and ladle, and vapor-proof lighting.
- DIY or Contractor Friendly: Ideal for homeowners, builders, and installers seeking a premium sauna kit with detailed assembly guidance.
- Home or Commercial Use: Suitable for personal wellness rooms, spas, gyms, and other indoor sauna applications.
Ideal For
- Custom home wellness and relaxation spaces.
- Indoor sauna room builds for residential properties.
- DIY customers and professional contractors.
- Spa, gym, and commercial wellness installations.
- Customers seeking a premium Thermo Poplar sauna kit with customizable bench layouts.
Specifications
- Product Type: Custom Indoor Sauna Room Kit.
- Dimensions: 8' x 9' x 8'.
- Usage: Indoor.
- Installation Type: Custom sauna kit for on-site assembly.
- Wood Type: Thermo Poplar.
- Wood Treatment: Thermally modified at approximately 374°F.
- Wall & Ceiling Boards: 1 x 4 tongue and groove boards in Thermo Poplar.
- Bench Boards: Clear 1 x 4 bench boards with supports, 20" deep, custom-built to selected configuration.
- Door Type: All-glass sauna door with wood handles and trim.
- Door Frame Size: 27.2" x 78.7" (690 x 2000 mm).
- Glass Size: 24.4" x 77.3" (620 x 1963 mm).
- Frame Thickness: 1.65" x 3.6" (42 x 92 mm).
- Rough Opening Required: 28" x 80".
- Flooring: Matching duckboard flooring for walk area.
- Ventilation: Upper and lower vent grills included.
- Moisture Barrier: Foil vapor barrier included.
- Lighting: Marine-grade, wall-mount, vapor-proof sauna light.
- Accessories Included: Ergonomic backrests, headrest, thermometer, sauna bucket with liner and ladle, and installation instructions.
- Recommended Ceiling Height: 8 feet.
- Wall Board Direction: Standard horizontal orientation unless room width exceeds 8 feet.
Health & Safety Notice
This product is designed for relaxation, recovery, and general wellness use. It is not intended to diagnose, treat, cure, or prevent any medical condition. Consult your healthcare provider before use if you have medical concerns.
Returns are subject to a 25% restocking fee. See our Return Policy for full details.
Shipping Information
Please contact us for current production, customization, and delivery estimates for your Carbon Smart™ Indoor Sauna Room Kit – 8' x 9' x 8'.
Sauna Heater Comparison Chart
| Feature | Harvia Cilindro 11KW | Harvia Club 10KW | Harvia Virta 10.5KW | Harvia Virta Combi 10.5KW |
|---|---|---|---|---|
| Product Image | ![]() |
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| Power Output | 11 KW | 10 KW | 10.5 KW | 10.5 KW |
| Brand | Harvia | Harvia | Harvia | Harvia |
| Control Type | WiFi Control | WiFi Control | WiFi Control | WiFi Control |
| WiFi Connectivity | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Heater Stones Included | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Railing Included | ❌ No | ❌ No | ✅ Yes | ✅ Yes |
| Combi Steam Function | ❌ No | ❌ No | ❌ No | ✅ Yes |
| Model Series | Cilindro Series | Club Series | Virta Series | Virta Combi Series |
| Model | Cilindro | Club | Virta | Virta Combi |
| Remote Control | App-based via WiFi | App-based via WiFi | App-based via WiFi | App-based via WiFi |
Harvia Cilindro 11KW WiFi

Harvia Club 10KW WiFi

Harvia Virta 10.5KW WiFi with Railing

Harvia Virta Combi 10.5KW WiFi with Railing

Key Differences
Power Output:
- Harvia Cilindro: Highest output at 11 KW — ideal for the largest sauna rooms
- Harvia Virta & Virta Combi: 10.5 KW — powerful performance with premium features
- Harvia Club: 10 KW — strong output in a commercial-grade floor-standing design
Control & Connectivity:
- All four models feature full WiFi connectivity with app-based remote control and scheduling
Design & Model Series:
- Cilindro Series: Iconic tall cylindrical design with massive stone capacity — the highest output in this lineup at 11 KW
- Club Series: Floor-standing commercial-grade design built for high-capacity and heavy-duty use at 10 KW
- Virta Series: Premium wall-mounted heater with WiFi, safety railing, and 10.5 KW output
- Virta Combi Series: Everything the Virta offers, plus an integrated steam generator for a combined sauna and steam bath experience
Included Accessories:
- All models come with heater stones included
- Harvia Virta and Virta Combi both include a protective safety railing
- Harvia Virta Combi is the only model with a built-in Combi steam function — delivering both traditional dry sauna heat and steam in one unit
