By CenturaHeat
4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W
🚚 Estimated Delivery: Wednesday, March 11 - Thursday, March 12
Questions before ordering?
Speak to our UK-based sauna support team on 0333 038 2800.
We’re happy to help with sizing, delivery, or installation questions.
Bring the complete spa experience home with the CenturaHeat 4 Person Combination Bio Indoor Sauna, available from Gym Fitness Store. Handcrafted from premium Canadian Hemlock, this spacious four-person sauna delivers both traditional steam and infrared therapy — giving you the flexibility to choose your preferred heat style or enjoy the benefits of both at once.
Steam and Infrared in One Cabin
This hybrid design combines a powerful 4500 W sauna stove for authentic steam sessions with 1600 W infrared carbon fibre panels for deep, muscle-penetrating warmth. Whether you prefer the gentle radiance of infrared or the enveloping humidity of a traditional sauna, this model provides a professional-grade experience tailored entirely to you.
Built for Shared Wellness
Perfect for couples or families, the spacious four-person layout offers room to relax without feeling crowded. The natural Canadian Hemlock interior enhances insulation while creating a calm, spa-like environment with a smooth finish and subtle wood aroma.
Smart Control and Immersive Comfort
Temperature, session length, and lighting can all be adjusted using the intuitive digital control panel or the included smartphone app. Bluetooth connectivity, FM radio, and USB MP3 playback let you enjoy music or guided sessions through built-in speakers, while ambient LED lighting and optional star ceiling lights help create a deeply relaxing atmosphere. A built-in oxygen ioniser keeps air fresh and comfortable throughout every session.
Hardwired installation required: This sauna must be connected to your property’s mains supply by a qualified electrician.
KEY FEATURES
Dual heating system: 4500 W stove plus 1600 W infrared carbon fibre panels
Flexible capacity: Spacious 4 person indoor layout
Premium materials: Crafted from high-quality Canadian Hemlock
Smart controls: Digital panel with mobile app connectivity
Wide temperature range: Adjustable from 18°C to 99°C
Custom session timer: Programmable from 1 to 99 minutes
Integrated audio: Bluetooth, FM radio, and USB MP3 playback
Ambient lighting: LED reading light, coloured light belt, optional star ceiling
Air purification: Built-in oxygen ioniser for fresher air
Home installation: Hardwired 230 V electrical connection
SPECIFICATION
Capacity: 4 person
Sauna Type: Indoor combination steam and infrared sauna
Heater Type: Infrared carbon fibre panels and traditional sauna stove
Temperature Range: 18°C–99°C
Timer: 1–99 minutes
Dimensions (W × D × H): 1800 mm × 1800 mm × 2000 mm
Material: Canadian Hemlock wood
Control Options: Digital control panel and mobile app
Audio: Bluetooth, USB MP3, FM radio
Lighting: LED reading light, coloured light belt, optional star ceiling
Air Quality: Built-in oxygen ioniser
Rated Power: 6100 W (4500 W stove + 1600 W infrared)
Voltage: 230 V
Current: 25 A (stove) + 13 A (infrared)
Connection: Hardwired installation required
Assembly: Flat-packed
Included Accessories: Bucket, ladle, sand timer, thermo-hygrometer, towel rack, sauna stones, oxygen ioniser
Warranty: 1 year (electrical components), 2 years (wooden structure)
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
This sauna is supplied flat-packed and is designed for home self-assembly. Full written instructions and a step-by-step video guide are included to help make installation straightforward.
Position the sauna on a level, solid indoor surface with adequate surrounding clearance for ventilation and access. Ensure the room is dry and well ventilated.
This model must be hardwired by a qualified electrician to a suitable 230 V supply. Ensure all electrical work complies with current regulations.
Please note: any device above 3000W requires an electrician to connect it to the mains.
Before first use, wipe down interior surfaces and run the sauna briefly to allow the heaters to settle. Always follow the safety guidance provided in the manual regarding session length, hydration, and safe operation.

Frequently Asked Questions
Infrared Sauna FAQ
Steam Sauna FAQ
Hybrid Sauna FAQ











