Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Specs
ModelFX30-U1-U3-XC, FX45-U1-U3-XC, FX30C-U1-XC, FX30C-U3-XC, Remote Only
Includes

What Is Included

FX30-U1-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. power unit data cable installation materials installation and operation manual.

FX45-U1-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. power unit data cable installation materials installation and operation manual.

FX30C-U1-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. humidity sensor power unit installation materials installation and operation manual.

FX30C-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. humidity sensor power unit installation materials installation and operation manual.

Remote Only

Included with purchase

Control panel installation materials installation and operation manual.

Contents vary by configuration. Check the row for the option selected above.

How It Fits

How This Product Fits the System

What it is used for

An external sauna-heater control component. Use it only with the heater family, voltage, phase, load, sensors, power unit, and cable arrangement named for the exact model.

What to plan

  • Match heater family, voltage, phase, maximum load, power unit, sensors, and control generation as one system.
  • Confirm whether the selected package includes the display, main module, sensors, cables, and any required extension box.
  • Sensor placement, door interlock, remote-start rules, and cable routing must follow the current control manual.

Designed to work with

Model-specific replacements and compatible system components.

Products that use this item

This item is used by the following products.

Attachments
Gallery

Harvia Fenix Upgraded Sauna Controller

Harvia Fenix Control series offers Wi‑Fi enabled 4.3″ touchscreen controls for Harvia sauna heaters and Virta Combi units. Models FX30‑U1‑U3‑XC (7 kW at 240 V/10.5 kW at 208 V), FX45‑U1‑U3‑XC (11 kW at 240 V/15 kW at 208 V), FX30C‑U1‑XC (10.8 kW combi) and FX30C‑U3‑XC (12.7 kW combi) provide remote control via the MyHarvia app; combi versions also manage the integrated steamer.4 variations

 

Build Your Quote:

Price range: $595.80 through $1,551.00

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Zero Interest Payments:

Buy Now, Pay Later with premium financing packages only available on Sauna Marketplace.

Pay with HSA/FSA:

We teamed up with FLEX to make HSA/FSA payments easier than ever.

Harvia Fenix Control units combine a sleek 4.3 inch color touchscreen with built‑in Wi‑Fi to give you complete control over your sauna. The intuitive Fenix interface lets you adjust temperature, lighting and ventilation, set heating duration and schedules and monitor your sauna remotely from your phone or tablet via the MyHarvia app. An AI‑based control algorithm learns your preferences to provide a personalised sauna experience. The wall‑mounted control panel and power unit are compact (panel approx. 3.66 in wide × 0.79 in deep; power unit approx. 14.29 in high × 10.51 in wide × 2.76 in deep) and designed for easy installation. A child‑lock and over‑temperature protection add safety and peace of mind.

Screenshot 2025 11 09 At 9.25.56 Pm Screenshot 2025 11 09 At 9.26.04 Pm

Variants included

  • Fenix FX30‑U1‑U3‑XC – designed for Harvia Club, Spirit, Cilindro and Virta series heaters. This unit controls single‑phase or three‑phase heaters and supports outputs up to 7 kW (240 V) or 10.5 kW (208 V). For larger heaters the FX30 can be expanded with the Harvia LTY45 power unit.
  • Fenix FX45‑U1‑U3‑XC – a higher‑capacity control for Harvia Club, Spirit, Cilindro, Virta and Virta Pro heaters. It can handle heaters up to 11 kW on 240 V or 15 kW on 208 V. Like all Fenix controls it provides remote start/stop, temperature and lighting control and scheduling via MyHarvia.
  • Fenix FX30C‑U1‑XC – a combi‑version control for single‑phase Virta Combi heaters. In addition to heater control it manages the integrated steamer so you can adjust humidity as well as temperature. Its maximum output is around 10.8 kW.
  • Fenix FX30C‑U3‑XC – combi‑version control for three‑phase Virta Combi heaters. It offers the same steamer control and Wi‑Fi functionality as the FX30C‑U1 but supports up to 12.7 kW of output.

These controls give you the flexibility to manage your sauna from anywhere and to tailor every session to your preferences, on a standard electric heater or a Virta Combi model with integrated steamer.

Expert help that stays with you

Whether you’re choosing one component or planning the whole room, small details can become expensive problems once installation begins. We know the products we sell and the questions to ask early, helping catch mismatched components, overlooked requirements, and installation issues while they are still easy to fix.

Our job does not end when your order ships. We stay available through installation and beyond. If something needs attention, we stay involved, work the problem, and help see it through.

We want you to feel good about choosing Sauna Marketplace long after your first session, and confident recommending us to a friend. That standard guides the advice we give, the products we sell, and the way we take care of our customers.

Sauna and heater customers also receive free shipping on sauna accessories for life.

Planning a sauna, or need help with one you purchased from us? Our founders have assembled many of the saunas we sell, visited the manufacturers, and use these products every day. New customers and existing Sauna Marketplace sauna and heater owners can Book a Ben consultation.

Specs
ModelFX30-U1-U3-XC, FX45-U1-U3-XC, FX30C-U1-XC, FX30C-U3-XC, Remote Only
Includes

What Is Included

FX30-U1-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. power unit data cable installation materials installation and operation manual.

FX45-U1-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. power unit data cable installation materials installation and operation manual.

FX30C-U1-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. humidity sensor power unit installation materials installation and operation manual.

FX30C-U3-XC

Included with purchase

Control panel temperature sensor please note: if the sensor comes with the heater, you must install per the instructions in the heater manual. humidity sensor power unit installation materials installation and operation manual.

Remote Only

Included with purchase

Control panel installation materials installation and operation manual.

Contents vary by configuration. Check the row for the option selected above.

How It Fits

How This Product Fits the System

What it is used for

An external sauna-heater control component. Use it only with the heater family, voltage, phase, load, sensors, power unit, and cable arrangement named for the exact model.

What to plan

  • Match heater family, voltage, phase, maximum load, power unit, sensors, and control generation as one system.
  • Confirm whether the selected package includes the display, main module, sensors, cables, and any required extension box.
  • Sensor placement, door interlock, remote-start rules, and cable routing must follow the current control manual.

Designed to work with

Model-specific replacements and compatible system components.

Products that use this item

This item is used by the following products.

Attachments
Gallery

PLAN THE WHOLE SAUNA

The room and heater still have to work as one system.

Start with the room dimensions, then account for glass, masonry, insulation, ceiling height, required clearances, and available electrical service. That is how we move from a product that looks right to a sauna that heats evenly and comfortably.