
Carbon Smart Saunas Kit - 4' x 4' x 8'
Carbon Smart Saunas Kit - 4' x 4' x 8' is a complete indoor sauna room kit with interior components precisely cut to the specified room dimensions. Framing, insulation, electrical wiring, and exterior wall covering are provided separately. The kit is constructed from Thermo Poplar wood, a thermally modified wood treated at approximately 374°F for dimensional stability and moisture resistance.
Specifications
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Room Size: 4' x 4' x 8'
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Wood Type: Thermo Poplar
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Modification Temperature: Approximately 374°F
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Door Frame Dimensions: 27.2" x 78.7" (690 x 2000 mm)
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Glass Dimensions: 24.4" x 77.3" (620 x 1963 mm)
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Frame Thickness: 1.65" x 3.6" (42 x 92 mm)
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Rough Opening Required: 28" x 80"
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Recommended Ceiling Height: 8 feet
What's Included
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Foil Vapor Barrier for moisture protection
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Ergonomic Backrests
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1×4 Tongue & Groove Boards (walls & ceiling, Thermo Poplar)
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Clear 1×4 Bench Boards with supports (20" deep, Thermo Poplar), custom-built to chosen configuration
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Corner Moldings for walls, ceiling, and baseboards (Thermo Poplar)
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All-Glass Sauna Door with wood handles and trim
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Duckboard Flooring for walk area (Thermo Poplar)
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Upper and Lower Vent Grills for air circulation
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Traditional Sauna Bucket with liner and ladle
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Sauna Thermometer
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Headrest
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Marine-Grade, Wall-Mount, Vapor-Proof Sauna Light
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Installation Instructions
Features
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Precision-Cut Kit: Interior components are cut to the specified room dimensions.
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Thermo Poplar Construction: Thermally modified wood offering dimensional stability, moisture resistance, and temperature fluctuation resistance through a chemical-free process.
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Customizable Bench Configurations: Multiple bench layout options available.
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Carbon-Smart Sourcing: Wood sourced through carbon-smart forestry practices.
Installation Notes
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Recommended ceiling height is 8 feet per manufacturer safety and clearance guidelines. For custom ceiling heights, contact support.
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Shipment includes an all-glass door; some reference photos may display a glass wall.
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Backrests are shipped flat; angled spacers can be added on-site for a custom pitch.
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Wall boards run horizontally unless room width exceeds 8 ft, in which case an interior seam is added where two boards meet.
Compatible Sauna Heaters
| Feature | Harvia KIP45B 4.5KW | Harvia KIP45W 4.5KW | HUUM Cliff Mini 3.5KW |
|---|---|---|---|
| Power Output | 4.5 KW | 4.5 KW | 3.5 KW |
| Cubic Feet Coverage | 176–353 cu ft | 176–353 cu ft | 106–247 cu ft |
| Control Type | Built-in Control | WiFi Control | WiFi Control |
| WiFi Connectivity | No | Yes | Yes |
| Heater Stones Included | Yes | Yes | Yes |
| Railing Included | No | No | Yes |
| Remote Control | Manual only | App-based via WiFi | App-based via WiFi |
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.



















