Centuraheat
Thermo Black 150 Steam Indoor Sauna
Thermo Black 150 Steam Indoor Sauna
SKU:HEAT-SM1016
🚚 Estimated Delivery: Wednesday, June 24 - Thursday, July 9
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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.
Features
| 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 |
- 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
Delivery Information
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 |
Assembly Service (Optional)
Our sauna assembly service is available as an optional extra when ordering a sauna.
This service is ideal if you’d like professional setup on the day of delivery, without the hassle of self-assembly.
Coverage
We currently cover most of England and Wales.
Please refer to coverage map below:
Green: Available for Assembly Service.
Red: Please contact us before including the Assembly Service.
Yellow (Striped) : We do not cover this area currently.
Delivery vs assembly date
The assembly date may differ from the delivery date shown on the product page.
Once your order has been placed, our team will contact you to confirm and arrange a suitable assembly date.
What happens on the day
- Arrival with the sauna
- Offloading of all components
- Assembly and positioning at the location specified by the customer
Important to note
- We do not carry out any electrical connections
- We do not remove packaging or waste from the site
FAQ
Frequently Asked Questions
How much does it cost to run a sauna?
The cost of running a sauna depends on its wattage and how long you use it. Our saunas typically range from 2kW to 10kW. On average, running a sauna for an hour can cost between £0.50 and £2.50. Please refer to this Electricity cost calculator for more information.
What warranties do you carry on the saunas?
Our warranty term is: 1 Year for electric parts, 2 Years for wooden parts.
Are the Saunas easy to assembly/Install?
All our saunas come with Assembly Instructions which are easy and detailed. Saunas are assembled together using buckles/clamps with some screwing involved.
For Infrared Light saunas, the sauna can be plugged into any standard outlet in the house. For traditional steam saunas, the power needs to be connected to the mains of the house by an electrician.
How hot does the sauna get and how hot does the steam get?
For traditional steam saunas, the heat time and temperature can set by control panel is: 0-90mins and 18-99 degrees Celsius. For Infrared Saunas, the maximum temperature is 65 degrees Celsius.
When is the right time to add water to the sauna stones?
To ensure optimal performance and to avoid potential damage, only add water once the sauna stones have reached the appropriate temperature. This heat level is necessary to properly vaporize the water, creating the ideal steam environment.
Why shouldn’t I add water before the stones are hot?
Adding water to cold or warm stones can cause inefficient steam production, leading to a less satisfying sauna experience. In some cases, this may even damage the heating elements or stones, reducing the lifespan of your sauna heater.
How can I tell if the stones are hot enough?
The stones should feel intensely hot when you bring your hand near them (without touching!). Many sauna heaters also feature a temperature gauge to help you monitor the heat levels. Wait until the gauge reads at least 300°F before adding water.
What type of water should I use?
Use clean, distilled water when possible. Tap water with high mineral content may cause buildup on the stones and heater over time, affecting performance.
Are there any precautions I need to take like anti-mould?
If the sauna is placed in a very humid area, try to keep it dry. otherwise, no need do any precaution.
What size cable does this need for its supply?
For 3000W saunas, you would need at least 2.5mm size power input wire. For 4500W saunas, you would need at least 4mm power input wire.
Would an RCD be needed for the steam sauna?
Yes, a REC protection from the board would be needed. Please talk to your local electrician for details.
Is it delivered assembled?
No, the sauna is delivered dissembled and flat packed. Assembly is simple and easy with assemble videos or PDF manual available.
How long does it take to heat up once you turn it on?
When the external environment temperature is 10 degrees Celsius, it takes about 15 minutes to heat up to 50 degrees Celsius, and about 30 minutes to heat up to 70 degrees Celsius.
Does the timber from the outside get hot? Is it safe for children to touch this?
The timber outside is not hot, just little warmer and safety for touch.
Can the outside be painted or will this affect it in anyway?
Yes, outside of sauna with wood nature colour paint.
What type of wood is it made of?
The wood is Canadian hemlock.
Oxygen lonizer. What is this and what is the cost?
This is negative ion generator, please email us for a price.
Does the heater not come with stones?
Yes, the sauna stones are included. Please thoroughly rinse sauna stones before use.
Mobile App system, how much would this cost?
The control panel already includes this function. Please check description for confirmation.
How much do the heater elements cost if they stop working?
Please email for a price for the replacement.
Instructions/Manual
| Thermo Black 150 Technical Drawing | View/Download |
| Kajo Heater Instruction Manual | View/Download |
| LED Waterproof Power Supply | View/Download |
