Which heaters is the Fenix FX45 compatible with?

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What is the maximum heater size the FX45 can control?

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Why buy the Harvia Fenix FX45 from NW Immersion?

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Harvia Fenix FX45 WiFi Sauna Control Package

$1,551.00 $1,723.00 SAVE $172.00

SKU: FX45-U1-U3-XC By Harvia

Authorized Harvia Dealer • Genuine Harvia Control Package

Modern Touchscreen Control for Your Harvia Sauna Heater.

The Harvia Fenix FX45 WiFi Sauna Control Package brings modern touchscreen control, remote sauna management, and a refined digital interface to compatible Harvia electric sauna heaters.

Designed with a high-quality 4.3" Fenix glass touchscreen, the FX45 gives you clean control over your sauna heater, lighting, and ventilation from a sleek wall-mounted control panel. With WiFi connectivity and MyHarvia remote-control capability, the Fenix FX45 allows you to manage your sauna from your phone when installed and configured according to Harvia’s requirements.

The FX45 is designed for select Harvia heaters, including Club, Spirit, Cilindro, Virta, and Virta Pro Series sauna heaters, and supports heater output up to 11kW at 240V single phase or 15kW at 208V three phase.

✓ Genuine Harvia Fenix FX45 WiFi Control Package
✓ 4.3" Touchscreen Glass Control Panel
✓ Compatible with MyHarvia Remote Control
✓ Controls Sauna Heater, Lighting & Ventilation
✓ For Select Harvia Club, Spirit, Cilindro, Virta & Virta Pro Heaters
✓ Supports up to 11kW at 240V or 15kW at 208V
✓ Surface-Mount or Flush-Mount Control Panel Installation
✓ Expert Support from an Authorized Harvia Dealer

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Premium Craftsmanship & Manufacturer Warranty
Expert Guidance Before, During & After Delivery
Personalized Delivery Planning & Coordination
Real Sauna Specialists Just a Call, Text or Chat Away

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Our team helps customers nationwide with sauna selection, site preparation, delivery planning, and installation guidance.

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Product Overview

A Smarter Way to Control Your Sauna

The Harvia Fenix FX45 WiFi Sauna Control Package is designed for sauna owners who want a more modern, intuitive control experience than a basic wall controller.

The Fenix control panel features a sleek glass touchscreen interface with a high-end look that pairs beautifully with modern sauna interiors. It allows you to control your electric sauna heater, lighting, ventilation, temperature, and operating time from one clean digital interface.

For added convenience, the FX45 supports remote control through the MyHarvia app or MyHarvia WebPortal when properly configured with Harvia’s remote-use requirements. Harvia describes the Fenix interface as modern and intelligent, with a user experience designed to align with the MyHarvia 2 app.

The control panel can be surface mounted or embedded and may be installed inside the sauna room, bathroom, or another suitable location according to Harvia’s installation requirements. Harvia notes that the Fenix glass screen is temperature and moisture resistant and can be installed inside the sauna room.

Why You'll Love it!

Modern 4.3" Touchscreen Interface

The Fenix FX45 features a sleek 4.3" glass touchscreen control panel for a more refined, intuitive sauna control experience.

WiFi + MyHarvia Remote Control

With MyHarvia compatibility, the FX45 allows remote sauna control and monitoring when installed and configured according to Harvia’s remote-use requirements.

Controls Heater, Lighting & Ventilation

The FX45 is designed to control your compatible electric sauna heater as well as supported sauna lighting and ventilation functions.

Designed for Select Harvia Heater Series

Bathing Brands lists the FX45-U1-U3-XC for Club, Spirit, Cilindro, Virta, and Virta Pro Series sauna heaters, making it a versatile control package for many premium Harvia heater installations.

Surface-Mount or Flush-Mount Installation

The Fenix panel can be installed as a surface-mounted or embedded control panel, giving sauna builders and homeowners more design flexibility.

Clean, Premium Design

The black glass touchscreen gives your sauna a more elevated control experience and pairs especially well with modern sauna interiors, premium heaters, and design-forward wellness spaces.

Compatibility

Designed for Compatible Harvia Electric Sauna Heaters

The Harvia Fenix FX45-U1-U3-XC is designed for compatible Harvia electric sauna heaters requiring an external control system.

Bathing Brands lists this model as a digital WiFi control for Harvia Club, Spirit, Cilindro, Virta, and Virta Pro Series sauna heaters.

Harvia lists the FX45 with a maximum output of 11kW at 240V single phase or 15kW at 208V three phase, with expansion possible using an LTY45 power unit where required.

Before ordering, confirm your heater model, voltage, phase, kW rating, installation requirements, and whether an additional power extension unit is needed.

What’s Included

Harvia Fenix Touchscreen Control Panel

High-quality glass touchscreen control panel for digital sauna control.

Power Unit

Included power unit for controlling the compatible sauna heater system.

Temperature Sensor and Cable

Temperature sensor and cable included for proper sauna temperature monitoring.

Control Panel Cable

Harvia lists a 5 m RJ10 4P4C black control panel cable with this control package.

Installation Materials

Screws and required installation materials included.

Installation & Operation Manual

Manufacturer documentation included for planning, installation, operation, and safety requirements.

Specifications

General

Brand: Harvia

Model: Fenix FX45

SKU / Item Number: FX45-U1-U3-XC

Product Type: Digital WiFi Sauna Control Package

Control Panel Type: Fenix Touchscreen

Color: Black

Installation Location: Wall

Use Environment: Interior dry area

User Group: Residential and professional use

Remote Use: MyHarvia WiFi compatible

Control Functions

Heater Control: Yes

Lighting Control: Yes, when installed with compatible lighting

Ventilation Control: Yes, when installed with compatible ventilation

Remote Control: MyHarvia app or MyHarvia WebPortal when properly configured

Control Interface: 4.3" touchscreen glass control panel

Temperature Adjustment Range: 104°F–194°F

Pre-Set Time Adjustment Range: 0–12 hours

Heater Output Compatibility

Maximum Output at 240V Single Phase: Up to 11kW

Maximum Output at 208V Three Phase: Up to 15kW

Extension Capability: Can be extended with Harvia LTY45 power unit where required

Harvia lists the FX45 with maximum output of 11kW at 240V single phase and 15kW at 208V three phase.

Control Panel Dimensions

Width: 3.66"

Height: 5.16"

Depth: 0.79"

Control Panel Weight: Approx. 0.4 lbs

Power Unit Dimensions

Height: 14.29"

Width: 10.51"

Depth: 2.76"

Power Unit Weight: Approx. 7.1 lbs

Package Details

Net Weight: Approx. 8.2 lbs

Gross Weight: Approx. 9.2 lbs

Package Height: 20.08"

Package Width: 10.91"

Package Depth: 3.27"

EAN: 6417659044059

Resources & Guides

Access the manufacturer documentation needed to plan, install, and operate your Harvia Fenix control package.

Harvia Fenix Installation & Operation Manual
Harvia Fenix Technical Data
Compatible Harvia Heater Documentation
MyHarvia App Setup Guidance
Harvia Remote Start Requirements
Harvia Warranty Documentation

Need help confirming compatibility? Contact NW Immersion before ordering and our team can help review your heater model, voltage, phase, kW rating, and control package requirements.

Professional Installation Required

The Harvia Fenix FX45 WiFi Sauna Control Package should be installed according to Harvia’s official installation manual, compatible heater requirements, local electrical code, and all applicable safety standards.

Because this control package connects to a sauna heater, power unit, sensor, lighting, ventilation, and optional remote-start functionality, installation should be completed by a licensed electrician familiar with sauna heater systems.

Before installation, confirm:

Your Harvia heater model is compatible.
Your heater kW rating is within the FX45’s output range.
Your voltage and phase match the correct installation configuration.
Whether an LTY45 extension unit is required.
Sensor placement follows Harvia’s heater manual.
Remote-start requirements are followed exactly.
The control panel location meets Harvia’s installation requirements.

Always follow the official Harvia Fenix installation and operation manual.

Shipping & Delivery

Free Shipping

The Harvia Fenix FX45 WiFi Sauna Control Package includes free shipping within the contiguous United States when it meets NW Immersion’s current free-shipping threshold.

When in stock, Harvia controls typically ship by parcel carrier within a few business days. Once your order ships, tracking information will be provided by email.

Shipping timelines may vary based on inventory, destination, carrier timing, holidays, weather, and seasonal demand. Contact NW Immersion before ordering for the most current lead time.

Warranty

Harvia Manufacturer Warranty

The Harvia Fenix FX45 WiFi Sauna Control Package is backed by Harvia’s manufacturer warranty when installed and used according to Harvia’s official instructions.

Warranty coverage may vary by installation type, use environment, heater pairing, electrical setup, and component. Some supplier listings note a 1-year limited warranty for consumer and commercial use for this control package.

As an Authorized Harvia Dealer, NW Immersion is here to help with product selection, compatibility questions, delivery coordination, troubleshooting, warranty documentation, and long-term support.

Always review the official Harvia warranty documentation included with your control package for complete warranty terms, installation requirements, and care instructions.

Frequently Asked Questions

The Harvia Fenix FX45 is a digital WiFi sauna control package used to operate compatible Harvia electric sauna heaters. It can also control supported sauna lighting and ventilation functions.

Harvia Club, Spirit, Cilindro, Virta, and Virta Pro Series sauna heaters. Always confirm compatibility with your exact heater model, voltage, phase, and kW rating before ordering.

Yes. The FX45 includes WiFi functionality and supports remote control through the MyHarvia app or MyHarvia WebPortal when installed and configured according to Harvia’s requirements.

Yes, when the control system is properly installed and connected, the FX45 can support remote sauna control through MyHarvia. Always follow Harvia’s remote-use and safety requirements.

Harvia lists the FX45 for heater output up to 11kW at 240V single phase or 15kW at 208V three phase. Larger or different configurations may require an additional Harvia power extension unit.

Harvia notes that the Fenix glass screen control panel is temperature and moisture resistant and can be installed inside the sauna room, bathroom, or another approved location according to the manual.

The package includes the Fenix touchscreen control panel, power unit, temperature sensor and cable, control panel cable, screws, installation materials, and installation/operation instructions.

Yes, the FX45 is designed to control the electric sauna heater as well as supported lighting and ventilation functions when installed with compatible components.

Yes. Because this control package connects to a sauna heater, power unit, sensor, and electrical system, installation should be completed by a licensed electrician according to Harvia’s official installation manual and local code.

NW Immersion is an Authorized Harvia Dealer and can help confirm compatibility, heater pairing, control requirements, delivery details, and long-term support for your sauna installation.