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Experience full climate control for larger saunas with the Harvia Fenix FX45 Digital WiFi Control. This smart touch screen panel manages compatible Harvia Club, Spirit, Cilindro, Virta, and Virta Pro heaters, giving you precise command over temperature, lighting, and ventilation from one clean interface or the MyHarvia app. Designed for both residential and commercial spaces, the FX45 learns how your heater warms up and adapts over time for faster heat up and more efficient operation.
| Model | Harvia Fenix FX45 U1 U3 XC |
| Control type | Digital touch screen sauna control with WiFi |
| Compatible heaters | Harvia Club, Spirit, Cilindro, Virta, and Virta Pro Series electric heaters |
| Maximum heater output | Up to 10.8 to 15 kW total load depending on voltage and phase |
| Voltage | 240 V or 208 V |
| Phase | Single phase or three phase |
| Operating temperature range | 104 to 194 °F at the control panel |
| Maximum on time | Up to 60 minutes per heating cycle |
| Mounting options | Surface mounted or flush mounted on wall |
| Installation location | Inside the sauna room or in an adjacent space |
| Control panel dimensions | 3.4 in W x 1.0 in D x 4.4 in H |
| Weight | Approximately 0.4 lb |
| Safety approvals | ETL listed |
| Warranty | Limited 1 year consumer and 1 year commercial warranty |
The Fenix FX45 is designed for use with Harvia Club, Spirit, Cilindro, Virta, and Virta Pro Series electric heaters within its rated output range. For larger installations where total heater load exceeds the controller rating, pair the FX45 with the Harvia Xenio or Fenix compatible power extension unit to increase capacity as required. Mount the glass control panel near the sauna door or in a nearby room for easy access, then locate the power unit in a dry service space according to the installation manual.
All wiring and startup must be completed by a licensed electrician following local electrical codes and Harvia installation instructions.










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Discover premium Harvia sauna heaters, controls, and accessories, backed by personalized product guidance, reliable delivery communication, and dedicated support from Sauna Luxuries.
Harvia heaters and accessories ship using the appropriate delivery method. Receive tracking information once available, with our team ready to assist.
With over 75 years of Finnish sauna expertise, Harvia combines trusted craftsmanship, innovative technology, and timeless design for an authentic sauna experience.
Get personalized assistance with Harvia heater sizing, controller compatibility, and installation requirements to confidently choose the right setup for your sauna.
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