• Thermo Black 220 Indoor Steam Sauna front view close up
  • Thermo Black 220 Indoor Steam Sauna side view
  • Thermo Black 220 Indoor Steam Sauna close up
  • Thermo Black 220 Indoor Steam Sauna in a modern home setting
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Thermo Black 220 Indoor Steam Sauna

HEAT-SM1017

The Indoor Sauna Thermo Black 220 is a premium 3-person indoor sauna made from heat-treated aspen with black waxed aspen benches. Designed with clean Finnish lines, strong insulation and a refined architectural look, it is suitable for homes, gyms and private wellness spaces.

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🚚 Estimated Delivery: Tuesday, July 7 - Thursday, July 9

⚡ High demand: Only 1 remaining for this delivery window.
£10,158.22
£10,158.22
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We ensure your sauna arrives safely via a specialized palletised delivery service. To help us provide a smooth experience, please review the following logistics:

  • Arrival & Access: Deliveries are made kerbside using a 7.5 or 18-tonne truck. If your property has restricted access for vehicles of this size, please notify us immediately. Note: Failure to advise on access may result in additional charges if a re-delivery on a smaller vehicle is required.
  • Handling: The driver will deliver to the kerbside only and is not responsible for moving the pallet further onto the property.
  • Delivery Charges: Free delivery is available to most areas. Please use the delivery fee calculator on the shopping cart page to verify your specific postcode.
  • Arrival Inspection: Please inspect your order upon delivery. If you notice any significant damage to the packaging, please reject the delivery and instruct the driver to return it to us immediately.

We want you to be completely satisfied with your wellness investment. If you change your mind, we offer a 30-day returns window.

  • Items must be returned in their original, unassembled packaging.
  • Please contact our support team to initiate the return process and receive further instructions.

Invest with confidence. This sauna is protected by a comprehensive manufacturer’s warranty to ensure long-term peace of mind:

  • Includes 3 years warranty on the structure and components covered by the respective conditions.

For more details on maintaining your sauna to keep it within warranty guidelines, please refer to the provided instruction manual.

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The Thermo Black 220 Indoor Steam Sauna brings elegant Finnish sauna design into the home, gym or wellness space. Made from heat-treated aspen, it offers a warm natural finish, excellent thermal performance and a mild wood aroma that helps create a relaxing sauna environment.

Designed for up to 3 people, this indoor sauna combines a spacious layout with black waxed aspen benches for a bold, modern contrast. Its modular structure allows the sauna to be assembled and disassembled more easily by two people, while the insulated cabin helps improve heating performance and long-term reliability.

The Thermo Black 220 is suitable for customers who want a design-led indoor sauna with a premium finish, without moving into a much larger commercial-style cabin. It is ideal for homes, gyms, wellness studios, spa rooms and dedicated relaxation spaces.

  • Premium 3-person indoor sauna
  • Made from heat-treated aspen
  • Black waxed aspen benches
  • Clean Finnish design
  • Suitable for homes, gyms and wellness spaces
  • Modular construction for easier assembly and disassembly
  • Designed for assembly by two people
  • Strong insulated structure for efficient heat retention
  • Heater power: 6.6 kW
  • Optional sauna assembly service available
  • Optional electrical installation available
  • Optional sauna interior treatment available
  • Product installation available

Key Features

Specification Value
Product name Thermo Black 220 Indoor Steam Sauna 
External dimensions 220 × 150 × 227 cm
External dimensions in mm 2200 × 1500 × 2270 mm
Internal dimensions 202 × 136 × 210 cm
Internal dimensions in mm 2020 × 1360 × 2100 mm
Internal volume 5.8 m³
Capacity 3 persons
Material Heat-treated aspen
Benches Black waxed aspen
Insulation PIR 30 mm
Heater power 6.6 kW
Assembly Easy assembly and disassembly by two people
Suitable spaces Homes, gyms and wellness spaces

 

Instructions

Thermo Black 220 Technical Drawing View/Download
Kajo Heater Instruction Manual View/Download
LED Waterproof Power Supply View/Download

FAQ

What is a steam sauna and how does it work?
What is a steam sauna and how does it work?

A steam sauna uses an electric heater filled with sauna stones. Pouring water over the hot stones creates steam and increases humidity, giving you the traditional Finnish-style sauna experience with hot, humid air and a stronger, more intense heat.

How hot does a steam sauna get?

Steam saunas usually run at higher air temperatures than infrared models. The final temperature depends on the heater output, cabin size, and insulation. Some people prefer short, intense sessions, while others enjoy a slightly milder heat with added steam.

Do steam saunas need plumbing?

No. Steam is produced by pouring water onto the heated stones by hand. There is no built-in water supply or drain inside the sauna. The room around it simply needs normal ventilation so any moisture can clear when the door is opened.

What power supply does a steam sauna need?

Steam sauna heaters vary by model, with many home units ranging from 3 kW to 9 kW.
Important: Any heater above 2.5 kW must be hard-wired on a dedicated circuit by a qualified electrician. Always check the heater rating before installation.

How long does a steam sauna take to heat up?

Most steam saunas take around 30 to 45 minutes to reach temperature, depending on the heater size, cabin volume, insulation, and room conditions. Allowing enough preheat time helps the stones get hot enough to produce steady steam.

Do steam saunas create a lot of moisture?

Inside the cabin, yes, and that is part of the experience. Outside the sauna, moisture is usually limited and mainly escapes when the door is opened. Standard room ventilation, such as a window or extractor fan, is normally enough to manage it.

Where can a steam sauna be installed?

Steam saunas can be fitted in indoor areas such as home gyms, utility rooms, larger bathrooms, or dedicated wellness spaces. Outdoor-rated models can also be installed in gardens, on patios, or in sheltered outdoor areas. Always check whether the model is intended for indoor or outdoor use.

Are steam saunas safe to use?

Steam saunas are commonly used at home and in commercial settings. It is important to stay hydrated, avoid alcohol before use, and leave the sauna if you start to feel unwell. Anyone who is pregnant or has a medical condition, particularly heart-related issues, should speak to a healthcare professional first.

How often should I use a steam sauna?

Many people use a steam sauna three to five times each week. Beginners often start with shorter sessions of around 8 to 12 minutes, then gradually increase the time as they become more comfortable with the heat.

Do steam saunas need much maintenance?

Maintenance is generally simple. Wipe the benches after use, leave the door open so the cabin can dry, and occasionally check, clean, or reposition the stones in line with the manufacturer’s guidance. If the sauna is installed outside, exterior wood treatment may also be needed.

What is the difference between a steam sauna and an infrared sauna?

A steam sauna heats the air and adds humidity to create a traditional high-heat environment. An infrared sauna warms the body more directly while keeping the air temperature lower. The right choice depends on whether you prefer a hotter, classic sauna feel or a gentler style of heat.