Choosing the right sauna heater controller is essential for creating the perfect sauna experience. Whether you're building a new sauna or upgrading an existing installation, understanding your control options will help you achieve optimal temperature regulation, convenient operation, and enhanced safety features. 

This comprehensive guide explores everything you need to know about sauna heater controllers available in the UK market.

What is a Sauna Heater Controller?

A sauna heater controller is an external control system that manages your electric sauna heater's temperature and timing functions. Most premium electric sauna heaters don't include built-in manual controls, requiring a separate controller to operate effectively.

Modern sauna controllers typically consist of three key components:

• Control Panel – The user interface where you adjust temperature, set timers, and control auxiliary features like lighting and ventilation.

• Power Unit – The electronic module that regulates the power supply to your heater (may be integrated or separate).

• Temperature Sensor – Monitors the sauna temperature to maintain your desired heat level accurately.

Why Invest in a Quality Sauna Controller?

Precision Temperature Management

Premium sauna controllers offer precise temperature control, typically ranging from 40°C to 110°C. This accuracy ensures consistent heat distribution and eliminates temperature fluctuations that can compromise your sauna experience.

Enhanced Convenience and Flexibility

Modern controllers provide numerous convenience features:

• Pre-timing functions that warm your sauna before you arrive home

• Remote operation via Wi-Fi connectivity and mobile apps

• Programmable schedules for regular sauna sessions

• Integration with lighting and ventilation systems

Safety and Peace of Mind

Quality controllers include essential safety features such as:

• Overheat protection systems

• Door sensors that shut off the heating when the door opens

• Child safety locks

• Automatic shut-off timers

Energy Efficiency

Intelligent controllers help reduce energy consumption by preventing unnecessary heating and allowing you to schedule sauna use during off-peak electricity hours.

Types of Sauna Heater Controllers

Local Manual Controllers

Local controllers are wall-mounted units installed near the sauna room, offering straightforward operation without requiring internet connectivity. These budget-friendly options are ideal for traditional sauna enthusiasts who prefer simple, reliable control systems.

Best for:

• Budget-conscious installations.

• Areas with poor Wi-Fi coverage.

• Users who prefer tactile, physical controls.

• Straightforward temperature and timing adjustments.

Wi-Fi Smart Controllers

Wi-Fi-enabled controllers represent the cutting edge of sauna technology, allowing remote operation through dedicated mobile applications. These sophisticated systems offer maximum flexibility and convenience for modern lifestyles.

Best for:

• Busy professionals who want their sauna ready when they arrive home.

• Tech-savvy users who appreciate smart home integration.

• Multiple users with different temperature preferences.

• Monitoring energy usage and session history.

Commercial Controllers

High-capacity controllers designed for public saunas, health clubs, spas, and hotels. These robust systems manage heaters ranging from 9kW to 33kW and include extended timing options and multiple memory settings.

Best for:

• Commercial sauna installations.

• Public facilities with extended operating hours.

• High-power heater systems (18kW+).

• Facilities requiring programmable schedules.

Leading Sauna Controller Brands at Finnmark Sauna

HUUM Sauna Controllers

HUUM has established itself as a leader in modern sauna controller design, offering sleek, intuitive interfaces with excellent compatibility across multiple heater brands. Their UKU range provides options for every budget and preference.

UKU Local Controller

The UKU Local represents an excellent entry point for those seeking reliable, straightforward sauna control without mobile app functionality.

Key Features:

• Temperature range: 40°C to 110°C.

• Heating periods: 3, 8, or 12 hours.

• Suitable for heaters up to 18kW.

• Supply voltage: 40A, 240V.

• Minimalist design in black, white, or wood finishes.

• Includes console, cable, main module, temperature sensor, door sensor, and sensor cable.

Available finishes:

• UKU Local Black Controller

• Standard panel options with black, white, or wood covers

The UKU Local is perfect for traditional sauna users who prioritise simplicity and cost-effectiveness whilst maintaining professional-grade temperature control.

UKU Wi-Fi Controller

The UKU Wi-Fi elevates the sauna experience with remote control capabilities through the HUUM mobile app, whilst maintaining full functionality as a standalone wall-mounted controller.

Key Features:

• Control via the HUUM mobile app or the physical panel.

• Temperature range: 40°C to 110°C.

• Heating periods: 3, 6, 12, or 18 hours.

• Timer function with precise scheduling.

• Integration with sauna lighting and ventilation systems.

• Suitable for heaters up to 18kW.

• Overheat protection, door sensor, and child safety lock.

Design Options:

• UKU Wi-Fi Control Unit Glass/Black – Contemporary aesthetic with black glass finish.

• UKU Wi-Fi Control Unit Glass/Mirror – Premium mirror-finish option.

• Standard control unit with classic design.

• Surface mounting frame available for flexible installation.

Important Note: A strong Wi-Fi network in the sauna area is essential for mobile app functionality. The controller can still be operated manually without internet connectivity.

UKU Control Panel Accessories

Finnmark Sauna offers a range of UKU panel covers to match your sauna's aesthetic:

• UKU Sauna Control Panel Black Cover (Panel Only)

• UKU Sauna Control Panel - Wood (Panel Only)

• UKU Sauna Control Panel - Mirror (Panel Only)

• UKU Sauna Control Panel - Gold Glass (Panel Only)

• UKU Sauna Control Panel Cover - Glass (Panel Only)

These replacement panels allow you to update your controller's appearance without replacing the entire system.

Universal Compatibility

All UKU controllers are compatible with other manufacturers' electric sauna heaters, provided the heater:

• It is designed for external control panels.

• Features temperature control functionality.

• Has a maximum output of 18kW.

This versatility makes UKU controllers an excellent choice when upgrading existing sauna installations or mixing components from different manufacturers.

Narvi Sauna Controllers

Narvi manufactures robust, reliable controllers for both residential and commercial applications. Their control systems are engineered for longevity and consistent performance in demanding environments.

Narvi N2014E Control Unit

The N2014E is Narvi's standard controller, included with most Narvi electric heater models. This versatile unit offers multi-voltage compatibility and straightforward operation.

Key Features:

• Compatible with heaters up to 10.5kW.

• Multi-voltage: 400V 3N~, 230V 1N~, or 230V 3~

• 24-hour pre-timing function.

• Temperature range: 60°C to 90°C.

• Overheat protection for the temperature sensor.

• It can be installed inside or outside the sauna room.

• Includes external control unit, external thermostat, and power card.

Installation Flexibility: The N2014E can be mounted either inside or outside your sauna, though installation locations must comply with manufacturer specifications regarding distance from the heater and floor level.

Available Accessories:

• Narvi N2012 / N2014 Control Panel Cover for aesthetic customisation.

Important Note: Electric heaters above 9kW must be installed on a 3-phase supply. All installations require a qualified electrician.

Narvi B-2003 Commercial Controller (9-15kW)

Designed specifically for commercial environments, the Narvi B-2003 offers set-and-forget operation ideal for health clubs, hotels, and spas with extended operating hours.

Key Features:

• Suitable for 9-15kW commercial electric heaters.

• Pre-timer with 7 memory slots for automated scheduling.

• Lighting switch for sauna illumination control.

• External temperature sensor.

• Maximum 20m distance from sauna room.

• Commercial-grade construction.

Compatibility: The B-2003 works with most manufacturers' commercial-grade electric heaters, providing flexibility when upgrading existing installations.

Narvi T-2003 Commercial Controller (9-15kW)

Similar to the B-2003 but featuring 24-hour pre-timing, the T-2003 offers enhanced scheduling capabilities for facilities with varied operating patterns.

Key Features:

• 24-hour pre-timer for daily programming

• Lighting switch integration

• Suitable for 9-15kW heaters

• External temperature sensor

• Compatible with most commercial electric heaters

Narvi C-2003 + F-2003 High-Power System (18-33kW)

For large commercial installations requiring substantial heating capacity, the C-2003 controller paired with the F-2003 power unit provides comprehensive control over high-output heaters.

Key Features:

• Suitable for 18-33kW electric heaters.

• 14 memory slots, allowing two daily sauna sessions.

• External temperature sensor.

• Integrated lighting switch.

• Must be installed outside the sauna in a technical room, office, or reception area.

This system is engineered for demanding commercial applications in health clubs, spas, and large public facilities.

Tulikivi Sauna Controllers

Tulikivi's Complete Wi-Fi Control System represents the pinnacle of smart sauna technology, combining advanced features with an elegant, minimalist design.

Complete Wi-Fi Control System

This sophisticated controller offers unprecedented customisation and control over your sauna environment, with particular emphasis on steam quality and energy efficiency.

Key Features:

• Black touchscreen with intuitive interface.

• Monitor sauna session duration.

• Adjust steam quality and intensity (löyly control)

• Create personalised user profiles.

• Maximum temperature: 110°C.

• Private use: up to 6 hours continuous operation.

• Public use: up to 24 hours with a mandatory 6-hour break.

• Energy-efficient operation, preventing unnecessary heating.

• Mobile app connectivity for remote control.

Unique Advantages:

The Tulikivi system excels in providing precise steam adjustment, allowing you to fine-tune the sauna atmosphere to your exact preferences. The user profile feature means multiple family members can save their ideal settings for instant access.

The sleek black touchscreen complements contemporary sauna designs, particularly darker wood species like thermo alder, creating a cohesive aesthetic throughout your sauna space.

IKI Sauna Controllers

IKI offers two principal controller options, each designed to integrate seamlessly with their electric heater range whilst providing distinct user experiences.

IKI Pro-B2 Controller

The Pro-B2 is the standard controller for IKI electric heaters up to 10.5kW, with expansion capability for higher-power installations.

Key Features:

• Standard for IKI heaters up to 10.5kW.

• Can control up to 30kW heaters when paired with the S2-30 contactor unit.

• IP 24 rating for moisture protection.

• Must be installed outside the sauna room.

• Operating temperature range: -10°C to +40°C.

IKI Wave Control Unit

The Wave represents IKI's premium controller option, featuring elegant wood finishes and enhanced functionality suitable for interior sauna installation.

Key Features:

• Compatible with all IKI electric heaters up to 10kW.

• Expandable to higher power with the S2-30 contactor.

• LED display for clear readability.

• Pre-run timer function.

• IP54 rating allowing interior installation.

• Key-lock function for security.

• Three premium wood finishes: dark wood, light wood, and black.

The Wave controller's superior IP rating and attractive wood finishes make it ideal for installations where the controller will be visible within the sauna environment, adding a premium aesthetic element to your space.

Helo Sauna Controllers

Helo offers controllers ranging from simple, budget-friendly options to sophisticated Wi-Fi-enabled systems, ensuring compatibility with its extensive heater range.

Helo Pure Control Panel

The Pure controller offers straightforward, reliable sauna control with flexible installation options.

Key Features:

• Compatible with Helo electric sauna heaters and steam generators.

• Wall-mounted operation.

• It can be installed inside or outside the sauna.

• Maximum 80cm from floor level when installed inside.

• Minimum 30cm distance from the heater body.

• Maximum ambient temperature at panel: 80°C.

The Pure is an excellent choice for cost-conscious installations requiring dependable performance without advanced features.

Helo Elite Free Control Panel

Helo's flagship controller, the Helo Elite, combines smartphone connectivity with personalised programming for the ultimate in convenience and customisation.

Key Features:

• Mobile app control via Helo Control™ app.

• Personalised settings with programmable schedules.

• Control for auxiliary fans and lighting.

• Sleek, modern design.

• Wide heater compatibility.

Compatible Helo Heaters:

• Himalaya 70 WT and 105 WT.

• Rocher 70 and 105.

• Roxx 60 and 90.

• Wall-mounted D-models with WE40 contactor box.

Expandable Compatibility:

When paired with appropriate contactor boxes, the Elite Free can control higher-power heaters:

• Laava (Elite Free + WE40)

• Magma (Elite Free + WE50)

• SKLE (Elite Free + WE40 contactor box)

• SKLA (Elite Free + WE50 contactor box)

Helo WE 50 Contactor Box

The Helo WE 50 relay box extends the Elite Free and Pure controllers' capabilities to commercial-grade heaters.

Key Features:

• Designed for 18kW to 26kW electric heaters.

• Bridges connect the heater and control panel.

• Compatible with Helo commercial models (SKLA, Magma).

• Enables residential controllers to manage commercial installations.

Compatibility Considerations

Matching Controllers to Heaters

Not all controllers work with every heater. Before purchasing, verify:

1. Power Rating – Ensure the controller supports your heater's kW output.

2. Voltage Requirements – Confirm single-phase or three-phase compatibility.

3. Brand Compatibility – Check if the controller works with other manufacturers' heaters.

4. Control Interface – Verify the heater is designed for external control panels.

Universal vs Brand-Specific Controllers

Universal Controllers:

• The HUUM UKU range works with most manufacturers' heaters (up to 18kW).

• Narvi commercial controllers are compatible with various brands.

• Offer flexibility when mixing components.

Brand-Specific Controllers:

• Typically included with heater purchase.

• Guaranteed compatibility and optimised performance.

• May offer unique features exclusive to that brand.

Three-Phase vs Single-Phase

Electric heaters above 9kW typically require a three-phase electrical supply. Ensure your controller supports the appropriate voltage configuration for your heater and electrical installation.

Installation Requirements

Professional Installation

All electric sauna heaters and controllers must be installed by a qualified electrician. This ensures:

• Compliance with UK electrical regulations.

• Proper earthing and safety measures.

• Correct voltage and amperage connections.

• Valid warranties and insurance coverage.

Location Guidelines

Controllers Installed Outside the Sauna:

• Protected from moisture and high temperatures.

• Easily accessible for daily operation.

• Within maximum cable distance from the heater (typically 20m).

• In ambient temperatures within a specified range.

Controllers Installed Inside the Sauna:

• Must have appropriate IP rating (moisture protection)

• Maintain required distances from the heater body.

• Installed at the correct height from the floor.

• Located where the temperature stays within tolerance.

Cable and Wiring

Professional installation includes:

• Appropriate cable gauge for power requirements.

• Proper routing through walls and spaces.

• Temperature sensor positioning.

• Door sensor installation (if included).

• Integration with lighting and ventilation (if applicable).

Smart Sauna Features and Mobile App Control

Wi-Fi Connectivity Benefits

Modern Wi-Fi controllers transform the sauna experience:

Remote Pre-heating: Start your sauna from work, the gym, or whilst running errands so it's perfectly warmed when you arrive home.

Temperature Monitoring: Check the current sauna temperature from anywhere to ensure optimal conditions.

Session History: Track your sauna usage, session duration, and temperature preferences over time.

Energy Management: Monitor electricity consumption and schedule sauna operation during off-peak hours.

Notifications: Receive alerts when your sauna reaches target temperature or when maintenance is required.

Mobile App Functionality

HUUM App (for UKU Wi-Fi):

• Intuitive interface for temperature and timing adjustments.

• Schedule weekly sauna routines.

• Control lighting and ventilation.

• Real-time status updates.

Helo Control™ App (for Elite Free):

• Personalised user profiles.

• Programmable schedules.

• Auxiliary equipment control.

• Session customisation.

Tulikivi App (for Complete Wi-Fi System):

• Löyly (steam) quality adjustments.

• Individual user profiles.

• Session duration monitoring.

• Energy efficiency tracking.

Network Requirements

For reliable Wi-Fi controller operation:

• Strong Wi-Fi signal in the sauna area.

• 2.4GHz network compatibility (most common requirement).

• Stable internet connection.

• Router placement considerations for outdoor saunas.

Top Tip: Most Wi-Fi controllers can still operate manually at the wall panel if internet connectivity is lost, ensuring your sauna remains functional regardless of network issues.

Choosing the Right Controller for Your Sauna

For Home Saunas (up to 9kW)

Budget Option:

• Helo Pure Control Panel.

• Narvi N2014E with basic cover.

Mid-Range Option:

• HUUM UKU Local (Black/Wood finish).

• IKI Pro-B2.

Premium Smart Option:

• HUUM UKU Wi-Fi (Glass/Mirror finish).

• Helo Elite Free.

• Tulikivi Complete Wi-Fi Control System.

For Larger Home Saunas (9-18kW)

Reliable Traditional Control:

• HUUM UKU Local (suitable up to 18kW).

• Narvi N2014E.

Smart Connected Control:

• HUUM UKU Wi-Fi.

• Tulikivi Complete Wi-Fi Control System.

For Commercial Installations

9-15kW Heaters:

• Narvi B-2003 (7 memory slots).

• Narvi T-2003 (24-hour pre-timer).

18-33kW High-Power Heaters:

• Narvi C-2003 + F-2003 combination.

Helo Commercial Setups:

• Elite Free + WE 50 Contactor Box.

• Pure + WE 50 Contactor Box.

Decision Factors

Choose Local Manual Control if:

• You prefer simple, tactile operation.

• Budget is a primary concern.

• Your sauna has poor Wi-Fi coverage.

• You're installing a traditional, off-grid sauna.

• You always pre-heat the sauna in person.

Choose Wi-Fi Smart Control if:

• You want remote pre-heating convenience.

• You're integrating sauna into a smart home.

• Multiple users need different temperature profiles.

• You want to monitor energy usage.

• Convenience and technology appeal to you.

Choose Commercial Controllers if:

• Installing in a public facility.

• Heater exceeds 15kW.

• You need automated scheduling for business hours.

• Multiple daily sessions are required.

• Robust, set-and-forget operation is essential.

Maintenance and Troubleshooting

Regular Maintenance

Monthly Checks:

• Verify accurate temperature readings.

• Test timer functions.

• Inspect control panel for damage or moisture.

• Check all button/touchscreen responsiveness.

Annual Service:

• Professional electrical inspection.

• Temperature sensor calibration.

• Power unit examination.

• Cable and connection review.

Common Issues and Solutions

Controller Not Powering On:

• Check the circuit breaker/fuse.

• Verify power supply connection.

• Inspect the control panel cable for damage.

• Contact a qualified electrician if the issue persists.

Inaccurate Temperature:

• The temperature sensor may require recalibration.

• Check sensor positioning inside the sauna.

• Ensure the sensor cable isn't damaged.

• Replace the sensor if faulty.

Wi-Fi Connectivity Problems:

• Verify a strong signal in the sauna area.

• Restart the router and controller.

• Check the app for firmware updates.

• Reconnect the controller to the Wi-Fi network.

Timer Not Functioning:

• Review the controller manual for proper timer settings.

• Check for error codes on display.

• Reset the controller to factory settings.

• Contact the manufacturer support if unresolved.

Warranty and Support

Finnmark Sauna provides comprehensive support for all controllers:

• Manufacturer warranties on all products.

• Technical support from knowledgeable staff.

• Installation guidance (professional installation required).

• Replacement parts availability.

For specific troubleshooting or technical questions about compatibility, our team is available via phone (+442080502895) or through our website contact form.

Upgrading Your Existing Sauna Controller

When to Upgrade

Consider upgrading your controller if:

• You want remote control and mobile app functionality.

• Your current controller lacks precision or features.

• You're installing a new, more powerful heater.

• Components are ageing or becoming unreliable.

• You desire enhanced safety features.

Upgrade Options

From Basic to Smart: Replacing a simple manual controller with a HUUM UKU Wi-Fi or Tulikivi Complete Wi-Fi System can transform your sauna experience without changing your heater.

From Local to Remote: If you have a compatible heater, adding Wi-Fi control is often straightforward with modern controllers designed for retrofit installations.

From Single-Function to Multi-Feature: Modern controllers integrate lighting, ventilation, and steam control, consolidating multiple switches into one elegant interface.

Installation Considerations

Professional installation is required when upgrading controllers. Your electrician will:

• Verify compatibility with the existing heater.

• Ensure adequate power supply and wiring.

• Properly position sensors.

• Configure and test all functions.

• Demonstrate operation and features.

Selecting Your Perfect Sauna Controller

Choosing the right sauna heater controller significantly impacts your sauna experience, offering enhanced convenience, precision temperature control, and valuable safety features. Whether you prioritise budget-friendly simplicity, cutting-edge smart home integration, or commercial-grade reliability, Finnmark Sauna's extensive range includes the perfect solution for your needs.

Key Takeaways:

• Verify compatibility between your controller and heater before purchasing

• Consider your lifestyle – remote control offers convenience for busy schedules

• Plan for professional installation to ensure safety and compliance

• Invest in quality for long-term reliability and enhanced features

• Think about future needs – smart controllers add value and flexibility

Expert Guidance Available

Selecting the optimal controller for your specific sauna setup can be complex, with considerations including power requirements, compatibility, installation location, and desired features. Finnmark Sauna's knowledgeable team is here to help you navigate these decisions.

Get in touch with us:

• Phone: +442080502895

• Website: finnmarksauna.com/pages/contact-us

• Free Consultations: Available for all sauna projects

Transform your sauna experience with the perfect controller. Browse our complete range of sauna heater controllers today, or contact our team for personalised recommendations based on your specific requirements*

All electric sauna heaters and controllers must be installed by a qualified electrician in accordance with UK electrical regulations. Please refer to individual product manuals for specific installation requirements, compatibility information, and safety guidelines. Specifications subject to manufacturer updates.

Frequently Asked Questions

What controller is best for my sauna heater?

The ideal controller depends on your heater's power rating, your budget, and desired features. For heaters up to 18kW, HUUM UKU controllers offer excellent compatibility and features. For specific brand heaters, manufacturer-matched controllers ensure optimal performance. Contact Finnmark Sauna for personalised recommendations based on your specific setup.

Can I control my sauna heater remotely?

Yes, Wi-Fi-enabled controllers like HUUM UKU Wi-Fi, Helo Elite Free, and Tulikivi Complete Wi-Fi Control System allow remote operation via smartphone apps. You can pre-heat your sauna from anywhere with internet access, making it ready when you arrive home.

Are sauna controllers compatible with all electric heaters?

No, compatibility varies. HUUM UKU controllers work with most manufacturers' heaters up to 18kW, whilst some controllers are brand-specific. Always verify compatibility with your heater model before purchasing. Key factors include power rating, voltage requirements, and whether the heater is designed for external control.

Do sauna controllers require professional installation?

Yes, all electric sauna heaters and controllers must be installed by a qualified electrician to comply with UK electrical regulations, ensure safety, and maintain warranty coverage. Professional installation guarantees proper voltage connections, earthing, and sensor positioning.

How far can a controller be from the sauna heater?

Maximum distance varies by model, typically ranging from 10-20 metres. Narvi controllers, for example, specify a maximum distance of 20m. Always consult the manufacturer's specifications for your specific controller model.

Can I add Wi-Fi control to my existing sauna?

If your current heater supports external control panels and has a maximum output of 18kW, you can often upgrade to a Wi-Fi controller like HUUM UKU Wi-Fi. Professional assessment and installation are required to verify compatibility and ensure proper integration.

What safety features do modern controllers include?

Premium controllers typically include overheat protection, door sensors that shut off heating when the door is opened, child-safety locks, automatic shut-off timers, and temperature monitoring systems. These features provide peace of mind and prevent accidents.

How do I maintain my sauna controller?

Perform monthly checks of temperature accuracy and timer functions. Annual professional electrical inspection is recommended. Keep the control panel clean and dry, and report any performance irregularities immediately. Avoid exposing controllers to excessive moisture or heat outside their rated specifications.