- Free Delivery*
- 1 - 5 Years Warranty
- After Sales Support
- Made in Thailand*
The Black Prism is our premium sauna heater, featuring a sleek tower design with clean geometric lines. This sophisticated heater combines modern aesthetics with exceptional heating performance, making it the centrepiece of any high-end sauna installation.
Standing 80.5cm tall with a compact 31 x 31cm footprint, the Prism heater fits elegantly into corner installations whilst its vertical profile creates visual impact. The enclosed design provides a clean, minimalist appearance, whilst the internal stone chamber delivers high-quality steam production.
Built with heavier-gauge construction (20.5kg without stones), the Prism is engineered for demanding use and long service life. The matte black finish complements contemporary sauna interiors, particularly those featuring dark timber, stone accents, or modern minimalist design.
This heater includes Wi-Fi connectivity for smartphone control, plus an external wall-mounted controller with a digital LCD display. Control your sauna from anywhere using the free app, or adjust settings at the controller outside your sauna door.
The Wi-Fi system includes a compact wireless adapter that connects to your home network. Setup takes just minutes, and the app works with both iOS and Android devices.
Choose from four power options to match your sauna room size. All of our sauna heaters are TÃœV Safety Certified.
| External Dimensions | 310 x 310 x 805 mm |
| Temperature Range | 60-105c |
| Power | 3 - 9kW |
| Heating Time | 30-45 mins |
| Expected Delivery | Currently 3-6 Weeks |
| Power | 3 - 9kW |
| Voltage | 220-240v or 3 Phase Power |
Please ensure electrical work is completed by a licensed electrician.
Q: What size heater do I need for my sauna?
A: Calculate the interior volume of your sauna room in cubic metres (length × width × height). As a general guide, allow approximately 1KW per 1.5–2 cubic metres. For outdoor saunas or rooms with large windows or glass doors, add 20% to account for heat loss. Use our Heater Size Guide above to match the right heater to your space.
Q: What makes the Prism heater premium?
A: The Prism is our top-tier heater line, featuring several distinguishing features. The sleek geometric tower design creates a striking visual element. Heavier-gauge construction (20.5kg vs 10–13kg for standard models) ensures durability and long service life. The enclosed stone chamber and clean lines deliver a minimalist aesthetic suited to high-end installations. Premium materials and finish quality throughout.
Q: Why choose the Prism over other heaters?
A: Choose the Prism if design aesthetics are a priority, if you're building a premium sauna for a luxury home or boutique commercial facility, or if you prefer the clean look of an enclosed heater to open-basket designs. The robust construction also makes it suitable for demanding use environments.
Q: Why is the Prism more expensive than other heaters?
A: The higher price reflects premium construction quality, heavier-gauge materials, sophisticated design engineering, and superior finish quality. The Prism is built for discerning customers who value both performance and aesthetics in their sauna equipment.
Q: How does the Wi-Fi control work?
A: The system includes a compact wireless adapter that plugs into the controller. Once connected to your Wi-Fi network, you download the free app to your smartphone. The app lets you turn the sauna on/off, set the temperature, adjust the timer, and monitor current conditions from anywhere with internet access.
Q: Is the Wi-Fi system difficult to set up?
A: Not at all. The adapter plugs directly into the controller and connects to your Wi-Fi network like any smart home device. The app guides you through pairing in a few minutes. No technical expertise or professional setup required.
Q: Can I still use the wall controller if the Wi-Fi is down?
A: Yes. The external wall controller works independently. Wi-Fi adds remote convenience, but the physical controller provides full functionality at all times, even without an internet connection.
Q: Can I install this heater myself?
A: The heater requires professional electrical installation by a licensed electrician. While mounting the heater and setting up Wi-Fi is straightforward, connecting to your electrical supply must be done by a qualified professional to ensure safety and compliance with Thai electrical regulations.
Q: How long does the heater take to warm up the sauna?
A: Expect 30–45 minutes to reach typical sauna temperatures of 80–90°C, depending on room size, insulation quality, and ambient temperature. The enclosed design efficiently dissipates heat through the stone chamber.
Q: Are the sauna stones included?
A: Yes. Each heater includes 18–22kg of premium sauna stones (shipped in 2 boxes). These volcanic stones are specifically selected for sauna use and can withstand thermal shock from water contact without cracking.
Q: What electrical supply do I need?
A: The heater operates on standard Thai 220–240V single-phase power. You will need a dedicated circuit with appropriate amperage (typically 30–40A, depending on heater size) and a correctly rated MCB. Your electrician will assess the capacity of your electrical panel.
Q: Can I pour water over the stones to generate steam?
A: Yes. The enclosed design has openings that allow you to pour water onto the heated stones. The resulting steam (löyly) vents through the chamber. Use moderate amounts of water for best results.
Q: Can I use this heater for an outdoor sauna?
A: Yes, but the heater itself must be installed inside the sauna room, protected from direct weather exposure. For outdoor saunas, select a heater size 20% larger than the calculated room volume to compensate for heat loss.
Q: Is this heater suitable for commercial use?
A: The Prism is designed for premium residential and boutique commercial applications, including luxury spas, wellness studios, private clubs, and high-end hotel suites. For high-traffic commercial facilities requiring heaters over 9 kW, consider our Nest heater range, which offers up to 15 kW of capacity.
Q: What is the warranty?
A: Heaters include a 1-year manufacturer's warranty covering defects in materials and workmanship. Warranty does not cover damage from improper installation, misuse, or normal wear of heating elements.
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