# 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W 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. ![](https://wp.prolinedirect.co.uk/wp-content/uploads/2024/06/SAUNA-MARKS.png) ### 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. 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. 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 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. ![](https://cdn.shopify.com/s/files/1/0931/0919/1003/files/sauna_map.webp?v=1783348915) **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 ### ### INSTRUCTIONS **Controller App Guide - Type A** For Bluetooth and Wi-Fi app setup, pairing and control instructions: [View Sauna Controller App Guide (PDF)](https://cdn.shopify.com/s/files/1/0931/0919/1003/files/Sauna_Controller_App_Guide_Type_A_HQ.pdf?v=1787909641) This model must be hardwired by a qualified electrician to a suitable 230 V supply. Ensure all electrical work complies with current regulations. Control Panel/Mobile App [Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/Control-Panel-Manual_1.pdf?v=1781536431) Instructions/Assembly Manual [Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/HEAT-HS3004-Manual.pdf?v=1781618559) Sauna Use Guide [Download](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/READ-FIRST-Sauna-Use-Guide.pdf?v=1781537642) **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. ## Details - **Price:** 3687.0 GBP - **Vendor:** CenturaHeat - **Type:** Saunas ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 3687.00 GBP | In stock | ## Images - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W - 4 Person Combination Bio Indoor Sauna by Centuraheat - 6100W --- > Source: [Gym Fitness Store](https://gymfitnessstore.co.uk/products/4-person-combination-bio-indoor-sauna-2) > Updated: 2026-08-28