CenturaHeat 4 Person Combination Bio Indoor Sauna - 6100W

4 Person Combination Bio Indoor Sauna

Enjoy the flexibility of both traditional and modern sauna therapy in the 4 Person Combination Bio Indoor Sauna. Designed with Canadian Hemlock and precision-engineered to accommodate four users comfortably, this dual-function unit allows you to switch between, or combine, the dry heat of a traditional stove and the muscle-penetrating warmth of infrared carbon fibre panels. Whether you’re looking for a quick wellness boost or a long, indulgent detox session, this 4 person hybrid sauna provides a complete solution right in the comfort of your own space.

Dual Heating for a Custom Experience:
The combination sauna heater delivers up to 6100W of combined infrared and stove power, letting users choose between deep radiant heat or the classic steam-room feel. Controlled through a digital computer system or mobile app, this indoor home sauna ensures total flexibility and convenience.

Built-In Comfort and Convenience:

Control Systems: Easy-to-use computer panel and mobile app

Audio Setup: FM Radio, USB MP3, Bluetooth, and 2 built-in speakers

Lighting: 1 LED reading light, coloured light belt, and optional coloured star lights

Oxygen Ionizer: Enhances air quality during sessions

Custom Settings: Temperature range from 18–99ºC and a 1–99 minute timer

Spacious and Stylish:
With symmetrical dimensions and a clean corner-friendly design, this sauna enhances any indoor wellness space. It’s an ideal solution for couples or small groups wanting the benefits of both traditional and infrared sauna therapies without compromise.

Dimensions: 1800 x 1800 x 2000mm (W x D x H)
Rated Power: 6100W
Voltage: 230V

Included Accessories:

Towel Rack

Bucket and Ladle

Sand Timer

Thermo-Hygrometer

Sauna Stones (rinse before use)

Oxygen Ionizer

Warranty: 1 year for electrical parts, 2 years for wood
Assembly: Delivered flat-packed with full instructions and video.

Please Note: The traditional stove operates independently and isn’t compatible with control panels, Wi-Fi, or Bluetooth. Both the infrared heater and the stove require separate hardwired connections, and the stove itself is controlled manually using the dials on its unit. This sauna requires an electrician to hardwire it into the property’s mains.

Explore more models in our full sauna collection

More Than Just Heat: Why Personal Matters

While public spa facilities might offer access to saunas, they lack the intimacy and control of a private unit. Owning your own sauna is like owning your own bed—you customise it, you trust its cleanliness, and it’s always available. No waiting, no sharing, no compromises. Whether it’s a daily ritual or a weekend indulgence, having your own space means better hygiene, deeper relaxation, and freedom on your terms.

Learn More Here: Home Saunas: Traditional Steam? Infrared? Or Hybrid…?

Features

Delivery

Delivery Package: Most Saunas are packaged in 3 - 5 Flat packed Boxes or 1 Wooden Crate, please refer to packaging info table below.

This product is delivered to Curb-Side only.

The driver is not required to take the package any further than this point. If you are unsure if your postcode constitutes for free delivery please revert to the delivery fee calculator on the shopping cart page.

Dimensions

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.