The Harvia Spirit is a Finnish-made electric sauna heater with a distinctive curved silhouette and a large stone capacity that promotes smooth, even heat distribution. Designed for both performance and safety, the Spirit includes dual safety sensors, an integrated load-detection system, and full WiFi control via your choice of the Harvia Xenio or Fenix control unit. Available in 6kW, 8kW, and 9kW configurations with 110 lbs of sauna stones included, this package is ready to install in a wide range of home sauna rooms.
Why Customers Choose the Harvia Spirit
- Finnish-made construction with premium materials and finish quality
- Dual safety sensors monitor both the heater and sauna room temperature to prevent overheating
- Integrated load-detection prevents the heater from turning on if items are placed on top of it
- WiFi connectivity allows remote start and monitoring via smartphone
- 110 lbs of Harvia R-991 sauna stones included — no separate purchase needed
- Choice of Xenio or Fenix WiFi control unit to match your preference and budget
- Available in three wattages to suit sauna rooms up to 494 adj. cu. ft.
Product Highlights
Curved Design with Large Stone Capacity
The Spirit's organic, rounded form is designed to hold a substantial volume of sauna stones, which soften and distribute heat evenly throughout the sauna room. The aesthetic complements both traditional and contemporary sauna interiors.
Dual Safety Sensor System
Two independent sensors monitor the heater unit and the ambient sauna temperature separately. If either exceeds safe operating thresholds, the heater shuts down automatically.
Load-Detection Safety Feature
The Spirit will not activate if objects are detected resting on top of the heater, making it safe to start remotely via the WiFi app without needing to visually inspect the unit first.
Xenio WiFi Control (CX30 / CX45)
The Harvia Xenio is a wall-mounted touch-screen control unit with WiFi connectivity for remote management of temperature, operating time, lighting, and fan. It can be installed inside or outside the sauna room and mounts flush or surface-mounted.
Fenix WiFi Control (FX30 / FX45)
The Harvia Fenix features a 4.3" moisture- and temperature-resistant glass touch screen with MyHarvia app integration. Its interface adapts to your heater's performance over time and can be installed in the sauna room, bathroom, or living area.
Three Wattage Options
Select 6kW for rooms up to 294 cu. ft., 8kW for up to 431 cu. ft., or 9kW for up to 494 cu. ft. Each configuration is paired with the appropriately rated control unit.
Specifications
| Brand | Harvia |
| Model | Spirit Series |
| Available Wattages | 6kW, 8kW, 9kW |
| Room Capacity | Up to 294 adj. cu. ft. (6kW) / Up to 431 adj. cu. ft. (8kW) / Up to 494 adj. cu. ft. (9kW) |
| Stones Included | 110 lbs Harvia R-991 (4 boxes) |
| Control Options | Xenio WiFi (CX30 / CX45) or Fenix WiFi (FX30 / FX45) |
| Control Screen | Xenio: Touch panel, 3.4"W × 1.0"D × 4.4"H / Fenix: 4.3" glass touch screen |
| Control Operating Temp Range | 104–194°F (Xenio) |
| Fenix Max Output | FX30: 7kW @ 240V / 10.5kW @ 208V · FX45: 11kW @ 240V / 15kW @ 208V |
| Control Mounting | Surface or flush-mounted; inside or outside sauna room |
| Remote App | MyHarvia (Fenix); Harvia app (Xenio) |
| Origin | Finland |
| Shipping Weight | 240 lbs |
Ideal For
- Home sauna rooms requiring a premium Finnish-made electric heater
- Installations where remote start via smartphone is a priority
- Sauna rooms ranging from compact personal spaces up to larger family-sized rooms
- Customers who want a complete heater-plus-control package without sourcing components separately
Important Information
- Professional electrical installation is required. This heater must be hardwired by a licensed electrician in accordance with local building and electrical codes and Harvia's installation specifications.
- Verify your sauna room's adjusted cubic footage against the selected wattage rating before purchasing. Rooms with exterior walls, glass panels, or poor insulation may require a higher wattage.
- Do not operate the heater without sauna stones fully loaded to the specified capacity.
- The load-detection safety feature requires that the top of the heater remain clear during remote start. Do not place towels, clothing, or other items on the heater.
- The Fenix control's MyHarvia remote access requires a separate MyHarvia Control Upgrade (sold separately).
- This product is intended for indoor sauna use only. Do not install in outdoor or unenclosed environments.
Frequently Asked Questions
What is the difference between the Xenio and Fenix control options?
Both controls offer WiFi connectivity and touch-screen operation. The Xenio is a compact wall-mounted panel with straightforward temperature, time, lighting, and fan controls. The Fenix features a larger 4.3" glass touch screen with a more advanced interface, MyHarvia app integration, and AI-assisted performance adaptation. The Fenix can also be installed inside the sauna room due to its moisture-resistant screen.
Are sauna stones included with this package?
Yes. Every configuration includes 110 lbs of Harvia R-991 sauna stones (4 boxes), which is the minimum recommended stone load for the Spirit heater.
Which wattage is right for my sauna room?
Choose based on your sauna room's adjusted cubic footage: 6kW for up to 294 cu. ft., 8kW for up to 431 cu. ft., and 9kW for up to 494 cu. ft. Rooms with exterior walls, large glass surfaces, or limited insulation may benefit from the next wattage up.
Can I start the heater remotely from my phone?
Yes. Both the Xenio and Fenix controls support WiFi-based remote operation via their respective apps. The Spirit's integrated load-detection safety feature ensures the heater will not activate if objects are resting on top of it, making remote start safe to use.
Does the Fenix control require a separate app subscription?
Basic control via the Fenix panel does not require a subscription. However, remote access via the MyHarvia app or MyHarvia WebPortal requires the MyHarvia Control Upgrade, which is sold separately.
Is professional installation required?
Yes. The Harvia Spirit requires a hardwired electrical connection and must be installed by a licensed electrician in compliance with local codes and Harvia's installation guidelines. Improper installation may void the warranty and create safety hazards.
Can the control panel be installed inside the sauna room?
The Xenio control can be installed inside or outside the sauna room. The Fenix control features a moisture- and temperature-resistant glass screen specifically designed to allow installation inside the sauna, bathroom, or living area.
The Harvia Spirit combines Finnish craftsmanship, integrated safety features, and flexible WiFi control in a single ready-to-install package. Select your wattage and preferred control unit above, and add it to your cart — our team is available if you have questions about sizing or installation requirements.
This product is intended for sauna use in a properly constructed sauna environment. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any condition. Consult a qualified professional before use if you have any health concerns.