Description
The Harvia Fenix FX45-U1-U3-XC is Harvia's most capable Fenix control unit — a premium sauna controller with Wi-Fi capabilities, high-quality glass screen, and AI learning technology that adapts to your heater's performance over time. Compatible with the full range of Harvia's premium electric heater lineup including the Club, Spirit, Cilindro, Virta, and Virta Pro Series, the FX45 supports the highest output range of any Fenix control — up to 10.8kW at 240V 1PH and 15kW at 208V 3PH. Sauna heater sold separately.
Whether you are managing a powerful Club K15G in a large commercial sauna or a Virta Pro in a high-end home installation, the FX45 delivers the intelligent control and remote accessibility to match the performance of Harvia's top-tier heaters.
Smart Control Performance
The Fenix FX45 elevates sauna control with AI learning technology that adapts to your heater's performance characteristics over time — optimizing how and when it heats for greater efficiency and comfort. From anywhere via Wi-Fi and the MyHarvia app, you can control temperature, lighting, and ventilation with precision. The high-quality glass screen provides a premium look and feel that complements Harvia's top-tier heater designs.
With support for both 240V 1PH (up to 10.8kW) and 208V 3PH (up to 15kW) in a single model, the FX45 covers the complete electrical range of compatible heaters — making it the definitive control solution for Harvia's most powerful electric heater series.
Key Features
- Wi-Fi connectivity for remote control and monitoring via smartphone or tablet
- AI learning — intelligently adapts to the performance of your sauna heater over time
- High-quality glass screen control panel for a premium look and feel
- Compatible with Club, Spirit, Cilindro, Virta, and Virta Pro Series sauna heaters
- Controls sauna heater, lighting, and ventilation
- Intelligent user interface — precise and easy to use
- Operating temperature range of 104–194°F
- Pre-setting time adjustment range of 0–12 hours
- Surface or flush-mount installation — installs inside or outside the sauna room
- Supports up to 10.8kW (240V 1PH) and 15kW (208V 3PH)
- Designed, engineered, and made in Finland
- 1-year limited warranty
What's Included
- Fenix FX45 Control Panel
- Temperature Sensor (Note: install the sensor included with your heater per the instructions in the heater manual)
- Power Unit
- Data Cable
- Installation Materials
- Installation and Operation Manual
- 1-Year Limited Warranty (Consumer Use) and 1-Year Limited Warranty (Commercial Use)
Product Specifications
Fenix FX45-U1-U3-XC Control Unit
| Model | FX45-U1-U3-XC |
| Maximum Output | 10.8kW (240V 1PH) / 15kW (208V 3PH) |
| Voltage | 240V / 208V |
| Phase | 1PH / 3PH |
| Temperature Adjustment Range | 104–194°F |
| Pre-Setting Time Adjustment Range | 0–12 Hours |
| Dimensions (W × D × H) | 3.4" × 1" × 4.4"H (8.6 × 2.5 × 11.2 cm) |
| Installation Type | Surface or Flush-Mount — inside or outside sauna |
| Connectivity | Wi-Fi — remote control and monitoring via app |
| Controls | Sauna heater, lighting, and ventilation |
| AI Learning | Yes — adapts to the performance of your sauna heater |
| Screen Type | High-quality glass screen |
| Compatible Heater Series | Club, Spirit, Cilindro, Virta, Virta Pro |
Technical Documents
| Installation & Operation Manual | Download Manual (PDF) |
| Warranty | Download Warranty (PDF) |
Why Choose the Harvia Fenix FX45-U1-U3-XC?
- Harvia's most powerful Fenix control — supports up to 10.8kW (1PH) and 15kW (3PH)
- The only Fenix control compatible with the Virta Pro Series
- AI learning adapts to your heater for a smarter, more efficient sauna experience
- Premium high-quality glass screen — a noticeable step up from standard touch panels
- Full Wi-Fi remote control — manage your sauna from anywhere via app
- Controls heater, lighting, and ventilation from one elegant panel
- Designed, engineered, and made in Finland
- 1-year limited warranty included