# Thermo Black 150 Steam Indoor Sauna The **Thermo Black 150 Steam Indoor Sauna** brings a premium Finnish sauna experience into a compact indoor footprint. With its dark thermo aspen interior, black benches and clean architectural finish, it is ideal for homeowners looking for a modern indoor sauna that feels both refined and practical. Designed to comfortably fit **2 people**, this sauna measures **1500 × 1500 × 2150 mm** externally, making it suitable for bathrooms, wellness rooms, basements and other dry interior spaces with enough access and ventilation. The supplier states that the sauna heats up to around **80 to 100°C in approximately 20 to 30 minutes**, depending on the selected heater and installation conditions. The Thermo Black 150 uses **thermo aspen** for the interior and benches, paired with **8 mm tempered glass**, **80 mm walls** and **50 mm mineral wool insulation**. This gives the cabin a strong, stable build while helping retain heat efficiently during regular use. The sauna is delivered in a modular flatpack format for indoor installation. Self-assembly is possible, although professional installation may be arranged depending on the customer’s space, access route and electrical requirements. Final electrical connection should be handled by a certified electrician. ### Key Features - Compact indoor sauna for **2 people** - Dark thermo aspen interior and black bench finish - Modern architectural black thermowood design - External size: **1500 × 1500 × 2150 mm** - Internal size: **1324 × 1370 × 2022 mm** - Approximate weight: **380 kg** - Interior volume: **3.67 m³** - Usable area: **1.81 m²** - Typical heat-up time: **20 to 30 minutes** - Designed to reach approximately **80 to 100°C** - **8 mm tempered glass** - **80 mm walls** - **50 mm mineral wool insulation** - Modular flatpack structure - Suitable for indoor wellness rooms, bathrooms, basements and dry interior spaces - Supplier states a **3-year warranty** applies to covered structure and components ### Specification Specification Value Product name Thermo Black 150 Steam Indoor Sauna Capacity 2 people Exterior dimensions 1500 × 1500 × 2150 mm Interior dimensions 1324 × 1370 × 2022 mm Interior volume 3.67 m³ Usable area 1.81 m² Weight Approx. 380 kg Interior wood Thermo Aspen Bench wood Thermo Aspen Glass Tempered glass, 8 mm Wall thickness 80 mm Insulation Mineral wool, 50 mm Heater 6.6 kW Kajo Heat-up time Approx. 20 to 30 minutes Assembly time 3 to 4 hours with 2 people Installation Professional installation available Delivery format Flatpack for indoor mounting ### Delivery Your sauna is delivered securely packaged to help ensure safe transport and straightforward handling on arrival. Most saunas are delivered in multiple flat-packed boxes or a wooden crate, depending on the model. Delivery is kerbside only, meaning the driver will deliver to the nearest accessible point at your property but is not responsible for moving the goods inside. This product is delivered on a 7.5 or 18 tonne vehicle. If access for a vehicle of this size may be restricted, please contact us in advance. Additional charges may apply if re-delivery is required using a smaller vehicle. If you are unsure whether your postcode qualifies for free delivery, please use the delivery fee calculator in the shopping cart. Sauna Type Weight No. of Boxes Dimensions Infrared Light Sauna 300kg + 3-5 Flat packed Traditional Steam Saunas 270kg + 4-7 Flat packed Outdoor Saunas 300kg + 3-6 Flat packed Wood Barrel Saunas 616kg + 1 Wood Crate Corner Saunas 350kg + 3-7 Flat packed Deluxe Relax Saunas 300kg + 3-7 Flat packed Combination Saunas 300kg + 4-7 Flat packed ### ### Instructions Thermo Black 150 Technical Drawing [View/Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/260306_Thermo_Black_150_Drawing.png?v=1777646022) Kajo Heater Instruction Manual [View/Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/EN_Saunamo-Kajo_A4_2026.pdf?v=1777644954) LED Waterproof Power Supply [View/Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/2.5m-A-30W_1.pdf?v=1777645282) ## Details - **Price:** 11639.98 GBP - **Vendor:** Centuraheat - **Type:** Saunas - **Tags:** HS-SAUNAS-1, Indoor Saunas, Traditional Steam Sauna ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 11639.98 GBP | In stock | ## Images - Thermo Black 150 Steam Indoor Sauna front view - Thermo Black 150 Steam Indoor Sauna in a modern home setting - Thermo Black 150 Steam Indoor Sauna side view - Thermo Black 150 Steam Indoor Sauna close up --- > Source: [Gym Fitness Store](https://gymfitnessstore.co.uk/products/thermo-black-150-steam-indoor-sauna) > Updated: 2026-09-12