# 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.

-   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

### Key Features

Specification

Value

Product name

Indoor Sauna Thermo Black 150

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

### 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

## 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 side view
- Thermo Black 150 Steam Indoor Sauna close up

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> Source: [Pro-Line Direct](https://prolinedirect.co.uk/products/thermo-black-150-steam-indoor-sauna)
> Updated: 2026-05-21