Indoor Cube Sauna (2 Person) in Black
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- £5,773.99
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£6,023.99 - Sale price
- £5,773.99
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Finnmark Thermo Wood Cube Indoor Sauna Black - Mini (2 Person)
Transform any room into a personal wellness retreat with our compact Thermo Wood Cube Sauna. Expertly crafted in Estonia with authentic Baltic sauna heritage, this premium indoor sauna combines modern design with centuries of traditional craftsmanship.
Why Choose Finnmark?
- Premium Black Thermally Modified Wood: Exceptional resistance to decay and warping. Darker, richer colour that ages beautifully, creating a stunning focal point in your home.
- Space-Efficient Design: Modern square barrel shape maximises interior space whilst maintaining a compact footprint (145cm × 133cm) – perfect for spare rooms, basements, or converted garages.
- Indoor Installation Ready: Designed primarily for indoor use with integrated ventilation system. Roof kit included should you wish to relocate outdoors in future.
- Sauna from Finland Member: We're the UK's first member of this prestigious certification, guaranteeing authentic sauna construction standards.
Technical Specifications
| Capacity | 1-2 people |
| Dimensions | L: 145cm | W: 133cm | H: 221cm |
| Weight | 450kg |
| Bench Length | 121cm |
| Frame Construction | 40mm thermally modified spruce |
| Interior Benches | Two-tier thermally modified aspen |
| Glass | 8mm tempered glass door and front walls |
What's Included
Base Unit Includes:
- 40mm thermally modified spruce frame and staves
- Two foundation beams
- Two-tier thermally modified aspen benches
- 8mm tempered glass door and front walls
- Thermally modified aspen flooring duckboards
- Integrated ventilation valve
- Bitumen roof shingles (for outdoor use if required)
- Two stainless steel frame bands
- Complete assembly hardware and detailed instructions
Complete Package Options:
- Option 1: Cube Sauna + Narvi NM 6kW Electric Heater – Authentic Finnish craftsmanship with premium stones for optimal heat distribution.
- Option 2: Cube Sauna + HUUM CORE 6kW Wall Heater (Black) – Includes HUUM Glass Black WiFi Controller, safety railing, and premium sauna stones.
Installation & Requirements
Room Preparation: Requires a level, solid floor capable of supporting 450kg (concrete, reinforced timber joists, or solid flooring). Allow minimum 150mm clearance from walls on all sides for proper air circulation and heat dissipation. Minimum room dimensions: 175cm × 165cm including clearance allowances.
Ventilation: Adequate ventilation is essential for safe operation. The room must have either natural ventilation (window or air vent) or mechanical extraction. Fresh air intake and exhaust are critical for maintaining proper oxygen levels and removing moisture during use.
Ceiling Height: Minimum 230cm ceiling height required to accommodate the 221cm sauna height plus clearance.
Electrical: The 6kW heater requires a dedicated 32A circuit installed by a qualified electrician (installation not included). Heater must be hardwired – no plug connection.
Assembly: Designed for straightforward DIY assembly. Most customers complete installation in a weekend with basic tools. Comprehensive instructions included.
Delivery: Specialist delivery required. Ships in a single DIY box (H:78cm, L:209cm, W:111cm). Ensure delivery access to your installation room.
Why Thermally Modified Wood?
Thermal modification isn't just a treatment—it's a complete transformation. The wood is heated to 200°C, permanently altering its cellular structure for exceptional durability. The naturally darker, richer colour creates a sophisticated aesthetic that complements contemporary interiors beautifully, whilst the enhanced stability ensures your sauna maintains its shape and performance for decades.
Perfect For
- Couples seeking a private wellness retreat at home
- Homeowners with spare rooms or basement spaces
- First-time sauna buyers
- Year-round wellness enthusiasts
- Property developers adding luxury amenities to residential or commercial spaces
About Finnmark Sauna
Finnmark Sauna is the UK's first member of "Sauna from Finland". Operating from Durham with a team of 40 specialists, we're dedicated to bringing authentic sauna experiences to British homes. We stock only premium brands including HUUM, Narvi, Tulikivi, IKI, Helo, and Kastor—never compromising on quality.
Building Regulations
Indoor sauna installations should comply with Building Regulations, particularly concerning ventilation, electrical safety, and structural loading. We recommend consulting with a qualified professional to ensure your installation meets all requirements. Most installations are straightforward, but specific requirements may vary depending on your property type and location.
Trusted by athletes in:
What do previous customers think about our sauna?*
*The survey was conducted in July 2026, a total of 89 customers out of 403 surveyed answered
Think the quality of the kit is positive or very positive
Our customers gave an average of 5 stars out of 6 when asked, "How would you rate the design of the sauna cabin?"
Consider the cabin is good value or very good value for money
Experienced that the delivery was good or very good
Frequently Asked Questions
Our saunas are delivered direct to your home via secure UK mainland flat-pack delivery. You can easily assemble it yourself with standard tools, or select our professional UK white-glove installation service at checkout.
Most electric heaters (6kW–9kW) require a dedicated 230V single-phase hardwired connection installed by a qualified UK electrician. Wood-burning stoves require no electrical supply.
Yes, absolutely. Built from premium high-grade weather-resistant wood, our sauna cabins are specifically engineered to withstand harsh UK rain, frost, and UV exposure year-round.
Yes, all our saunas come with a comprehensive 5-year UK manufacturer warranty covering the wood structure and heater components.
Maintenance is minimal. We recommend applying a protective exterior wood oil once a year and wiping down the interior benches with a clean, damp cloth after use.
