Harvia Fenix FX30C-U3-XC Control Unit

The Harvia Fenix FX30C-U3-XC Control Unit delivers advanced combi-sauna control engineered for high-capacity 3-phase installations. Designed for use with 3-phase electric combi sauna heaters (heater + steamer + ventilation) up to approx. 12.7 kW at 240 V, this WiFi-enabled system combines a premium 4.3″ glass-touch control panel with full mobile app integration via the MyHarvia platform. Whether you are upgrading a large-format sauna or specifying a premium home wellness space, the FX30C-U3-XC offers smart scheduling, remote monitoring, and refined control—bringing the ultimate sauna experience to your luxury home spa.

Signature Features

• High-Capacity Combi Sauna Control — Supports heater + steam + fan/vent control for up to 12.7 kW (240 V single-phase equivalent) in 3-phase configuration.
• WiFi + MyHarvia App Integration — Connect your sauna control to home WiFi network; monitor and operate remotely via the MyHarvia mobile/web app.
• Glass-Touch Panel Interface — Contemporary 4.3″ Fenix glass screen, moisture- and temperature-resistant, for surface or flush mounting inside or outside the sauna room.
• Independent Heater & Steamer Control — Manage both sauna heating and steam generation along with lighting and ventilation for full climate control.
• Built-in Learning Algorithm — The unit adapts to your sauna’s performance for optimized warm-up, energy efficiency and consistent comfort.
• Flexible Installation Options — Compatible with 3-phase power setups; suitable for flush or surface mounting near sauna door, bathroom or living space. 

Specifications

Model

FX30C-U3-XC

Maximum Output

Up to approx. 12.7 kW (240 V) for combi sauna heater + steamer. 

Supported Heater Type

3-phase combi sauna heaters (heater + steam) and climate/vent control.

Connectivity

WiFi (2.4 GHz) & MyHarvia app/web portal. 

Control Panel Dimensions

Approx. 3.4″ W × 1″ D × 4.4″ H (8.6 cm × 2.5 cm × 11.2 cm) 

Temperature Range

Approx. 104 °F-194 °F (40 °C-90 °C) typical sauna range. 

Installation Options

Power unit wall-mounted outside sauna; panel inside or outside per manufacturer guidelines.

Warranty

1-Year Limited Warranty (consumer use). 

What’s Included

• Harvia Fenix FX30C-U3-XC Control Unit (panel + power module)
• Control Panel Cable (typically 5 m RJ10) & Power Unit
• Temperature Sensor & Cable, Humidity Sensor & Cable (combi version)
• Wall Mounting Plate & Fasteners
• Installation & Operation Manual
• Manufacturer’s Limited Warranty Certificate

Warranty Coverage

• 1-Year Limited Warranty — Covers defects in materials or workmanship for original purchaser when installed properly.

Warranty may be voided by improper wiring, unauthorized modifications, or use outside compatible heater ranges.

Why Choose the Harvia Fenix FX30C-U3-XC?

• Designed for large-format or premium home wellness saunas—supports high-output combi heaters and full climate control.
• Seamless WiFi integration and mobile control mean your sauna is ready when you are—no guesswork.
• Independent control of heater and steam allows you to tailor sessions from dry-heat to steam-rich environments.
• Stylish glass-touch panel and compact power module suit luxury interior aesthetics found on MyLuxuryHomeSpa.com.
• Backed by Harvia—a trusted leader in sauna solutions worldwide, ensuring longevity and performance.

Pro Tip

Mount the control panel in a location accessible yet away from direct heat or steam. Use the MyHarvia scheduling function to start your sauna warm-up during off-peak hours and allow the steam module to reach target humidity just as the heater reaches set temperature for optimal comfort.

Installation & Operation Manual (PDF)

Warranty Information