CenturaHeat
CenturaHeat 4-5 Person Diamond Corner Indoor Sauna
CenturaHeat 4-5 Person Diamond Corner Indoor Sauna
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Estimated Delivery: 6th January 2026 to 12th February 2026
Add style and efficiency to your wellness routine with the 4–5 Person Diamond Corner Infrared Sauna – a beautifully engineered unit that combines advanced infrared technology with elegant design. Crafted from Canadian Hemlock, this compact corner model is perfect for those who want to save space without compromising on comfort or performance. Ideal for individuals, couples, or small groups, it brings spa-quality relaxation into the heart of your home.
Inside, powerful carbon fibre heaters deliver consistent, gentle warmth that penetrates deeply into muscles – soothing tension, aiding circulation, and offering a more comfortable alternative to traditional steam heat. The smart control system allows you to customise each session with ease, using either the built-in digital panel or the mobile app. With integrated Bluetooth, USB/MP3, FM radio, and dual speakers, you can create the perfect soundtrack for your downtime.
Key Features
- Space-Saving Design: Diamond layout seats 4–5 while optimising floor space.
- Carbon Fibre Heating: Even, muscle-relaxing warmth.
- Dual Control System: Operate via onboard panel or mobile app.
- Entertainment System: FM radio, Bluetooth, USB/MP3, and 2 speakers.
- Lighting Options: 3 LED reading lights plus optional colour star lights.
- Air Purification: Optional oxygen ioniser for fresher air.
- Custom Settings: Adjustable 18–65ºC, with 1–99 minute timer.
- Voltage & Power: 230V, 2700W.
- Size: 650 mm (W) × 1200 mm (W2) × 1500 mm (D) × 1200 mm (H).
- Included: Oxygen ioniser (optional), sand timer, thermo-hygrometer, installation guide.
*Electrical Information: Plug-and-play design. Connects directly to a standard UK socket once assembled.
Shared Warmth, Personal Comfort
Owning a sauna is like having your own bed – always clean, always familiar, and always ready when you are. Unlike a public spa, there’s no waiting, no strangers, and no limits. Just peace, privacy, and the freedom to relax on your own terms. Whether you’re easing into the day or winding down at night, this sauna makes wellness a daily ritual.
Features
- Weight: 196 kg
- Dimensions: 150 × 65 × 190 cm
- Capacity: 4–5 people
- Heater Type: Infrared carbon fibre
- Width 1: 650 mm
- Width 2: 1200 mm
- Depth: 1500 mm
- Height: 1900 mm
-
Power Output: 2700W
FAQ
How much does it cost to run a sauna?
Running costs depend on wattage and usage time. Our saunas range from 2kW to 10kW. On average, an hour’s use costs between £0.50 and £2.50. For more details, use an electricity cost calculator.
What warranties do you offer?
- Electrical components: 1 year
- Wooden parts: 2 years
Are the saunas easy to assemble/install?
Yes. All saunas include clear assembly instructions. Most panels are secured with buckles or clamps, with minimal screwing required. Infrared saunas plug into a standard household socket, while traditional steam saunas must be hardwired to the mains by a qualified electrician.
How hot do the saunas get?
- Traditional steam saunas: 18–99°C, set via the control panel (0–90 mins).
- Infrared saunas: up to 65°C.
When should I add water to the stones?
Only add water once the stones are fully heated. Adding water too soon reduces steam quality and may damage the heater.
How do I know when the stones are hot enough?
The stones should feel intensely hot when you bring your hand close (without touching). Many heaters also have gauges – wait until it reads at least 300°F (approx. 150°C).
What type of water should I use?
Use clean, distilled water where possible. Tap water with high mineral content may cause limescale build-up over time.
Do I need to take anti-mould precautions?
Generally no, but if your sauna is in a very humid space, keep the area as dry as possible.
What cable size is required?
- 3000W saunas: 2.5 mm supply cable
- 4500W saunas: 4 mm supply cable
Do I need an RCD for a steam sauna?
Yes, RCD protection is required. Please consult a qualified electrician.
Is the sauna delivered assembled?
No, saunas are delivered flat-packed. Assembly is simple, with video and PDF guides included.
How long does it take to heat up?
At an ambient temperature of 10°C:
- ~15 minutes to reach 50°C
- ~30 minutes to reach 70°C
Does the exterior timber get hot?
The outside becomes warm but remains safe to touch, even for children.
Can the exterior be painted?
Yes, it can be painted with suitable wood-coloured paint.
What type of wood is used?
All our saunas are crafted from Canadian Hemlock.
What is an oxygen ioniser?
An optional negative ion generator that freshens the air. Please contact us for pricing.
Are stones included with the heater?
Yes, sauna stones are supplied – rinse thoroughly before use.
Does the control system include a mobile app?
Yes, the control panel includes app connectivity. Please check the product description for confirmation.
How much do replacement heater elements cost?
Please contact us for current pricing on replacement parts.
Delivery
Most saunas are delivered in 3–5 flat-packed boxes or in a single wooden crate (please see the table below for details).
This product is delivered to kerbside only. The driver is not required to carry the package beyond this point.
Packaging Information
- Sauna Type: Corner Saunas
- Weight: 350 kg+
- Number of Boxes: 3–7
- Format: Flat-packed
- Description
- Features
- FAQ
- Delivery
- Delivery & Returns
Estimated Delivery: 6th January 2026 to 12th February 2026
Add style and efficiency to your wellness routine with the 4–5 Person Diamond Corner Infrared Sauna – a beautifully engineered unit that combines advanced infrared technology with elegant design. Crafted from Canadian Hemlock, this compact corner model is perfect for those who want to save space without compromising on comfort or performance. Ideal for individuals, couples, or small groups, it brings spa-quality relaxation into the heart of your home.
Inside, powerful carbon fibre heaters deliver consistent, gentle warmth that penetrates deeply into muscles – soothing tension, aiding circulation, and offering a more comfortable alternative to traditional steam heat. The smart control system allows you to customise each session with ease, using either the built-in digital panel or the mobile app. With integrated Bluetooth, USB/MP3, FM radio, and dual speakers, you can create the perfect soundtrack for your downtime.
Key Features
- Space-Saving Design: Diamond layout seats 4–5 while optimising floor space.
- Carbon Fibre Heating: Even, muscle-relaxing warmth.
- Dual Control System: Operate via onboard panel or mobile app.
- Entertainment System: FM radio, Bluetooth, USB/MP3, and 2 speakers.
- Lighting Options: 3 LED reading lights plus optional colour star lights.
- Air Purification: Optional oxygen ioniser for fresher air.
- Custom Settings: Adjustable 18–65ºC, with 1–99 minute timer.
- Voltage & Power: 230V, 2700W.
- Size: 650 mm (W) × 1200 mm (W2) × 1500 mm (D) × 1200 mm (H).
- Included: Oxygen ioniser (optional), sand timer, thermo-hygrometer, installation guide.
*Electrical Information: Plug-and-play design. Connects directly to a standard UK socket once assembled.
Shared Warmth, Personal Comfort
Owning a sauna is like having your own bed – always clean, always familiar, and always ready when you are. Unlike a public spa, there’s no waiting, no strangers, and no limits. Just peace, privacy, and the freedom to relax on your own terms. Whether you’re easing into the day or winding down at night, this sauna makes wellness a daily ritual.
- Weight: 196 kg
- Dimensions: 150 × 65 × 190 cm
- Capacity: 4–5 people
- Heater Type: Infrared carbon fibre
- Width 1: 650 mm
- Width 2: 1200 mm
- Depth: 1500 mm
- Height: 1900 mm
-
Power Output: 2700W
How much does it cost to run a sauna?
Running costs depend on wattage and usage time. Our saunas range from 2kW to 10kW. On average, an hour’s use costs between £0.50 and £2.50. For more details, use an electricity cost calculator.
What warranties do you offer?
- Electrical components: 1 year
- Wooden parts: 2 years
Are the saunas easy to assemble/install?
Yes. All saunas include clear assembly instructions. Most panels are secured with buckles or clamps, with minimal screwing required. Infrared saunas plug into a standard household socket, while traditional steam saunas must be hardwired to the mains by a qualified electrician.
How hot do the saunas get?
- Traditional steam saunas: 18–99°C, set via the control panel (0–90 mins).
- Infrared saunas: up to 65°C.
When should I add water to the stones?
Only add water once the stones are fully heated. Adding water too soon reduces steam quality and may damage the heater.
How do I know when the stones are hot enough?
The stones should feel intensely hot when you bring your hand close (without touching). Many heaters also have gauges – wait until it reads at least 300°F (approx. 150°C).
What type of water should I use?
Use clean, distilled water where possible. Tap water with high mineral content may cause limescale build-up over time.
Do I need to take anti-mould precautions?
Generally no, but if your sauna is in a very humid space, keep the area as dry as possible.
What cable size is required?
- 3000W saunas: 2.5 mm supply cable
- 4500W saunas: 4 mm supply cable
Do I need an RCD for a steam sauna?
Yes, RCD protection is required. Please consult a qualified electrician.
Is the sauna delivered assembled?
No, saunas are delivered flat-packed. Assembly is simple, with video and PDF guides included.
How long does it take to heat up?
At an ambient temperature of 10°C:
- ~15 minutes to reach 50°C
- ~30 minutes to reach 70°C
Does the exterior timber get hot?
The outside becomes warm but remains safe to touch, even for children.
Can the exterior be painted?
Yes, it can be painted with suitable wood-coloured paint.
What type of wood is used?
All our saunas are crafted from Canadian Hemlock.
What is an oxygen ioniser?
An optional negative ion generator that freshens the air. Please contact us for pricing.
Are stones included with the heater?
Yes, sauna stones are supplied – rinse thoroughly before use.
Does the control system include a mobile app?
Yes, the control panel includes app connectivity. Please check the product description for confirmation.
How much do replacement heater elements cost?
Please contact us for current pricing on replacement parts.
Most saunas are delivered in 3–5 flat-packed boxes or in a single wooden crate (please see the table below for details).
This product is delivered to kerbside only. The driver is not required to carry the package beyond this point.
Packaging Information
- Sauna Type: Corner Saunas
- Weight: 350 kg+
- Number of Boxes: 3–7
- Format: Flat-packed
Order Confirmation: As soon as you place your order, we will pre-authorise your card however your card will not be charged. We will then contact our supplier to confirm that the product you have purchased is available for immediate shipment. Once confirmed we will process the payment and your order will be dispatched straight away. If there is any delay such as an item which is on backorder, we will void the pre-authorisation and contact you to let you know.
Order Delivery: Once your order has been placed, assuming it is in stock and available for dispatch, we will charge your card and your order will be dispatched within 5 working days. We’ll send you tracking details by email within 24 hours of your order being dispatched. If you have not received tracking details within 6 working days, please reach out to us via email at contact@gymsphere.co.uk so that we can help.
Damages: We ask that you thoroughly inspect all items at the point of delivery. We advise you not to accept delivery of any damaged items. If you discover that an item has been damaged, please send clear photos of the damaged items
to contact@gymsphere.co.uk so that we can open an insurance claim on your behalf.
Cancellations & Refunds: Any orders cancelled after 48 hours of placing the order may be subject to additional fees. If your order has been dispatched, you (the buyer) will be responsible for any costs associated with returning the item. Any refunds can only be issued to the same payment method which was used to place the order.