Smart sauna controllers have evolved dramatically in 2025, offering sophisticated features like smartphone apps, voice control, energy monitoring, and AI-powered optimization. These advanced systems transform basic saunas into connected wellness centers that adapt to your preferences and schedule.
The best smart controllers provide reliable performance, comprehensive mobile apps, and seamless integration with popular smart home platforms. They also include essential safety features like overheat protection, automatic shutoffs, and remote monitoring capabilities.
Choosing the right smart controller depends on your sauna type, desired features, and technical expertise. This comprehensive guide reviews the top options and helps you select the perfect system for your needs.
HUUM UKU WiFi: Best overall smart controller
The HUUM UKU WiFi consistently ranks as the best smart sauna controller for 2025 due to its robust construction, comprehensive mobile app, and reliable performance across all sauna types. This Finnish-engineered system supports heaters up to 11kW (expandable to 18kW) and works with traditional, infrared, and steam saunas.
The HUUM mobile app provides intuitive control over temperature, humidity, lighting, and ventilation systems. You can start heating remotely, set custom schedules, and receive notifications when your sauna reaches optimal temperature. Advanced features include vacation mode, child lock, and detailed energy monitoring.
Installation is straightforward with clear wiring diagrams and comprehensive documentation. The system includes a main control module, temperature sensor, door sensor, and your choice of three control panel designs: Classic, Glass, or Wood to match your sauna’s aesthetic.
Key Features:
- Temperature range: 40-110°C (104-230°F)
- Remote smartphone control with HUUM app
- Supports lighting and ventilation integration
- Multiple control panel design options
- Overheat protection and child safety locks
- 3-year warranty on electronics
The UKU WiFi excels in reliability and customer support. HUUM provides regular firmware updates and responsive technical assistance. The system works consistently even in harsh sauna environments and maintains stable WiFi connections.
Price: $400-600 depending on control panel choice
Best for: Users wanting professional-grade reliability with comprehensive smart features
Harvia Xenio WiFi: Premium traditional sauna control
Harvia’s Xenio WiFi controller represents the premium choice for traditional Finnish saunas, offering seamless integration with Harvia heaters and professional-grade performance. The MyHarvia mobile app provides sophisticated control over temperature, humidity, lighting, and ventilation functions.
This system shines in its attention to traditional sauna operations. The controller maintains precise temperature control, manages humidity through intelligent water dosing, and includes advanced safety features designed for high-heat traditional saunas.
The Xenio WiFi supports complex automation including week timers, memory functions for power outages, and calibration features for precise temperature control. Professional installers often prefer this system for its robust design and comprehensive monitoring capabilities.
Key Features:
- ETL certified for North American installation
- MyHarvia app with advanced scheduling
- Automatic calibration and memory backup
- Professional-grade safety monitoring
- Integration with Harvia’s full ecosystem
- Surface or recessed installation options
The MyHarvia app receives regular updates and offers one of the most polished user experiences available. Features like remote temperature monitoring and energy usage tracking help optimize sauna operation for efficiency and cost control.
Price: $350-500 for controller module
Best for: Traditional sauna enthusiasts and professional installations
SaunaLogic WiFi: Best value smart controller
SaunaLogic delivers excellent smart sauna control at an affordable price point without sacrificing essential features. This North American-made controller supports most residential sauna heaters and provides reliable smartphone control through a well-designed mobile app.
The system focuses on core functionality rather than flashy extras. You get solid temperature control, remote operation, basic scheduling, and essential safety features. The mobile app is straightforward and reliable, making it perfect for users who want smart control without complexity.
Installation requires basic electrical knowledge but includes clear instructions and responsive customer support. The controller works with both 120V and 240V systems and supports various heater types including infrared and traditional elements.
Key Features:
- Support for heaters up to 12kW
- Intuitive mobile app control
- Basic scheduling and timer functions
- Overheat protection and safety monitoring
- 120V/240V compatibility
- Made in North America
SaunaLogic prioritizes reliability over advanced features. The system maintains consistent performance and receives regular app updates. Customer service is excellent with knowledgeable technicians who understand North American electrical codes.
Price: $200-300
Best for: Budget-conscious users wanting reliable smart control
Steamist Total Sense: Luxury steam sauna automation
Steamist’s Total Sense controller represents the pinnacle of steam sauna automation, offering sophisticated humidity control, aromatherapy integration, and premium user experiences. This professional-grade system is designed for luxury steam showers and high-end wellness installations.
The controller manages steam generation, temperature, humidity, lighting, music, and aromatherapy delivery through a comprehensive automation system. The accompanying app provides detailed session tracking, maintenance reminders, and energy monitoring.
Installation requires professional expertise due to complex steam system integration. However, the results deliver spa-quality experiences with precise environmental control and extensive customization options.
Key Features:
- Precise steam and temperature regulation
- Integrated aromatherapy dispensing
- Professional-grade controls and monitoring
- Comprehensive mobile app with analytics
- Integration with luxury smart home systems
- Commercial-grade reliability
The Total Sense system excels in environments where precise environmental control matters. Steam generation responds quickly to changes, humidity remains consistent, and the system adapts to user preferences over time.
Price: $800-1,200 depending on configuration
Best for: Luxury steam sauna installations and commercial applications
Custom Arduino-based systems: Ultimate flexibility
Arduino-based smart sauna controllers offer unlimited customization for technically inclined users. These DIY systems can integrate virtually any sensor, control any heater type, and connect to any smart home platform while costing significantly less than commercial alternatives.
Popular projects use ESP32 microcontrollers with temperature sensors, relay modules, and custom PCBs designed specifically for sauna environments. Home Assistant integration provides professional-grade dashboards and automation capabilities that exceed most commercial systems.
Building custom controllers requires programming knowledge and electrical skills. However, online communities provide extensive documentation, code examples, and troubleshooting support for common sauna automation projects.
Key Components:
- ESP32 or Arduino microcontroller
- DS18B20 waterproof temperature sensors
- Solid-state relays for heater control
- Custom PCB or breadboard assembly
- Home Assistant or custom mobile app
Custom systems excel at unique requirements like multiple zone control, advanced energy monitoring, or integration with existing smart home infrastructure. You can add features like air quality monitoring, health tracking integration, or advanced safety systems.
Price: $50-200 for complete DIY system
Best for: Tech enthusiasts wanting maximum customization and control
Installation and setup considerations
Smart sauna controller installation varies dramatically between systems. WiFi controllers like HUUM and Harvia require basic electrical knowledge but include comprehensive instructions. Custom Arduino systems need more technical expertise but offer greater flexibility.
Electrical Requirements: Most controllers need dedicated circuits and proper grounding. Check voltage requirements (120V vs 240V) and ensure your electrical panel can support the additional load. Consider hiring an electrician for high-voltage installations.
Network Infrastructure: Reliable WiFi is essential for smart controllers. Install mesh network extenders if your sauna is located far from your router. Some controllers support ethernet connections for maximum reliability.
Safety Compliance: Ensure your chosen controller meets local electrical codes. UL-listed or ETL-certified controllers provide additional safety assurance and may be required by local authorities.
Integration Planning: Consider how your sauna controller will integrate with existing smart home systems. Home Assistant provides the most flexibility, while Apple HomeKit and Google Home offer simpler setup for basic control.
Proper installation ensures reliable operation and prevents safety issues. When in doubt, consult with qualified electricians familiar with sauna installations and local codes.