🎛️ Harvia C400VKK Professional Sauna Controller – Up to 40kW Heater Capacity

Command Your Commercial Sauna with Finnish Precision and Advanced Touch Control

♨️ Product Overview

The Harvia C400VKK represents the pinnacle of commercial sauna control technology, purpose-built to manage electric heaters up to 40kW with exceptional precision and reliability. As the sophisticated successor to Harvia’s legendary C260 controller, this updated model brings modern touch-screen convenience to professional sauna environments whilst maintaining the robust performance that has made Harvia synonymous with quality.

Manufactured by Harvia in Finland, a company with over 75 years of sauna expertise, the C400VKK delivers comprehensive facility management far beyond basic temperature control. The integrated system manages heating, lighting, ventilation, and electronic locks through an intuitive 2.3″ touch interface, making it the command centre for housing complexes, hotels, spas, sports facilities, and wellness centres where dependable, automated operation is essential.

With eight programmable weekly schedules, remote start capabilities, and multi-language support, this controller transforms any commercial sauna into a fully automated, professionally managed facility.

⭐ Key Features

✅ 40kW Maximum Heater Capacity – Control even the largest commercial electric heaters with confidence and precision

✅ 2.3″ Colour Touch Screen – Built-in intuitive control panel with clear icons and multi-language interface (Finnish, Swedish, English, German, Russian)

✅ 8 Programmable Week Programs – Automate sauna schedules for different times, days, and user groups throughout the entire week

✅ Remote Start System – Activate your sauna remotely with compatible safety devices (door switch or Harvia SFE safety switch)

✅ Integrated Lighting Control – Manage sauna lighting directly from the control panel (max 100W, 230V)

✅ Ventilation Management – Control ventilation fans for optimal air circulation (max 100W, 230V)

✅ Electronic Lock Integration – Manage access control and security locks through the unified system

✅ Resettable Overheat Protection – NTC thermistor sensor with automatic thermal cut-out for maximum safety

✅ Memory for Power Failures – Resumes operation automatically after power interruptions when enabled

✅ Dehumidifying Function – 45-minute drying cycle helps maintain sauna condition and longevity

✅ CE Certified – Fully compliant with European safety and electromagnetic compatibility standards

✅ 2-Year Manufacturer Warranty – Comprehensive coverage from Harvia for peace of mind

⚙️ Technical Specifications

Specification	Value
Maximum Heater Capacity	40 kW
Supply Voltage	400V 3N~ (Three-Phase)
Temperature Control Range	40–110°C
On-Time Range	1–12 hours (18h and 24h with supervision)
Pre-Setting Time Range	0–12 hours
Control Panel	2.3″ Built-in Touch Screen
Dimensions (H × W × D)	560 × 325 × 120 mm
Lighting Control	Max 100W, 230V 1N~
Fan Control	Max 100W, 230V 1N~
Additional Equipment Control	Max 100W, 230V 1N~
Safety Devices Supported	Door switch, Safety switch (Harvia SFE)
Remote Control	Short circuit connection (ON/OFF)
Program Memory Slots	8
Languages	Finnish, Swedish, English, German, Russian
Installation Location	Dry area outside sauna (>0°C)
Mounting Type	Wall-mounted
Certifications	CE
Warranty	2 years

Temperature Sensor (WX232 – Included):

Specification	Value
Sensor Type	NTC Thermistor (22 kΩ at 25°C)
Protection	Resettable Overheat Protector
Dimensions	51 × 73 × 27 mm
Weight (with cable)	175 g
Cable Length	Approx. 4 m

📐 Heater Compatibility & Fuse Requirements

The C400VKK is designed for commercial heaters requiring 400V three-phase power supply. Use the following guide to determine appropriate circuit protection:

Heater Power	Required Fuses
17–24 kW	3 × 35 A
24–34 kW	3 × 50 A
34–40 kW	3 × 63 A

Additional Electrical Requirements:

• Residual Current Device (RCD): 40 mA
• Electronic Card Fuse: T2.5 AH (Slow-blow)
• Dedicated Circuit: Required
• Main Isolator Switch: Required

⚠️ This controller is compatible with Harvia commercial heaters including the Profi, Senator, Club, Virta, and similar models requiring external control units.

💷 Operational Cost Considerations

The C400VKK controller itself consumes minimal power for its electronic functions. However, understanding the running costs of the heaters it controls helps with facility budgeting.

UK Energy Rate Used: £0.2635/kWh (Ofgem Price Cap Q4 2025)

Example Annual Running Costs for Controlled Heaters:

Heater Size	Usage Level	Sessions/Week	Est. Hours/Year	Annual Cost
20 kW	🏢 Light	3	225	£1,186
20 kW	🏢 Regular	5	375	£1,976
20 kW	🧖 Heavy	7	525	£2,767
30 kW	🏢 Light	3	225	£1,779
30 kW	🏢 Regular	5	375	£2,964
30 kW	🧖 Heavy	7	525	£4,150
40 kW	🏢 Light	3	225	£2,372
40 kW	🏢 Regular	5	375	£3,953
40 kW	🧖 Heavy	7	525	£5,534

Calculation Formula:

Annual Cost = Heater kW × Hours/Year × £0.2635

Example (30 kW heater, Regular Use):
30 kW × 375 hours × £0.2635 = £2,964 per year

⚠️ Actual costs vary based on heater efficiency, sauna insulation, target temperature, and current energy tariffs. The C400VKK’s programmable schedules help optimise energy usage by ensuring heaters only operate when required.

⚡ Installation Requirements

Electrical Specifications

Requirement	Specification
Supply Voltage	400V 3N~ (Three-Phase + Neutral)
Heater Circuit Breaker	As per heater power (35A–63A per phase)
RCD Protection	40 mA
Dedicated Circuit	Required
Main Isolator	Required (accessible outside sauna)

Installation Location Requirements

Requirement	Specification
Location	Dry area outside sauna room
Ambient Temperature	Above 0°C
Mounting	Wall-mounted (brackets included)
Ventilation	Do NOT recess into wall structure

Temperature Sensor Placement

Sensor	Position
WX232 (Primary)	Wall-mounted above heater, 100mm from ceiling, on heater’s centre line
WX325 (Optional)	Wall-mounted 500–700mm from ceiling, away from heater

⚠️ IMPORTANT: Install sensors at least 1000mm from unidirectional air vents or 500mm from vents directed away from the sensor. Incorrect placement causes inaccurate temperature readings and potential overheating.

⚠️ CRITICAL: All electrical installation must be performed by a qualified 
electrician in accordance with BS 7671 (IET Wiring Regulations) and local 
building codes. Connection to the mains supply requires a qualified 
professional.

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🛡️ Safety Features & Certifications

Built-in Safety Systems

✅ Resettable Overheat Protection – Thermal cut-out automatically interrupts heater operation if sensor temperatures exceed safe limits

✅ Safety Switch Support – Compatible with Harvia SFE or equivalent devices that prevent operation when items are placed on the heater

✅ Door Switch Integration – Enables remote start only when sauna door is confirmed closed

✅ Automatic Timer Cut-off – Maximum 12-hour operation (18h/24h requires continuous supervision)

✅ PIN Code Lock – 4-digit security code prevents unauthorised access and remote activation

✅ Power Failure Memory – Configurable auto-resume or manual restart after power interruptions

✅ 6-Hour Rest Period – Optional safety interval between heating cycles to prevent overuse

Certifications

✅ CE Marked – Full compliance with European Low Voltage Directive and EMC requirements

✅ IEC/EN 60335-2-53 – Compliant with safety standards for electric sauna heaters and controls

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🎯 Ideal Applications

Application	Typical Heater Size	Notes
🏢 Housing Complexes	10–20 kW	Shared resident saunas with scheduled access
🏨 Hotels & Resorts	15–30 kW	Guest wellness facilities requiring reliable automation
🧖 Professional Spas	20–40 kW	High-capacity commercial operations
🏋️ Sports & Fitness Centres	15–30 kW	Heavy daily use with multiple user groups
🏥 Wellness & Health Centres	20–40 kW	Therapeutic applications requiring precise control
🏛️ Public & Municipal Saunas	25–40 kW	Community facilities with scheduled operating hours

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🔧 Control Features & Programming

Week Timer Programming

The C400VKK stores up to eight independent weekly programs, each configurable for:

• Start Time – When the heater activates
• Target Temperature – 40–110°C adjustable
• End Time – When the heater shuts off
• Active Days – Select any combination of weekdays

Programs can overlap across days, enabling complex scheduling for facilities with multiple user groups or operating patterns.

Remote Start Options

Three remote activation modes accommodate different facility requirements:

1. Safety Switch Mode – Activates when Harvia SFE or compatible device confirms no obstructions on heater
2. Door Switch Mode – Activates when magnetic door sensor confirms sauna is unoccupied
3. No Safety Device – For heaters over 20kW or those meeting cover test standards (per IEC/EN 60335-2-53)

Additional Controls

• Lighting – On/off control for connected sauna lights (max 100W)
• Ventilation – On/off control for connected exhaust fans (max 100W)
• Indicator Output – Signal for external “sauna in use” displays
• Lock Control – Manage electronic door locks for access control

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❓ Frequently Asked Questions

Q: What size heaters can this controller manage? A: The C400VKK controls electric sauna heaters from 3kW up to 40kW. For heaters above 40kW, additional power extension units may be required.

Q: Is the control panel included with the unit? A: Yes, the 2.3″ touch screen panel is permanently integrated into the controller housing. No separate panel purchase is required.

Q: Can I control the sauna from my smartphone? A: The C400VKK does not include built-in WiFi. However, it supports remote start via hardwired connections, which can be integrated with building management systems or home automation.

Q: What safety devices are required for remote start? A: For heaters under 20kW, either a door switch or Harvia SFE safety switch is required per IEC/EN 60335-2-53. Heaters over 20kW or those meeting cover test standards can be operated without safety devices.

Q: Can I use this with non-Harvia heaters? A: The C400VKK is designed for Harvia heaters but will control any compatible 400V three-phase electric sauna heater up to 40kW that accepts external control signals.

Q: What is the warranty period? A: Harvia provides a 2-year manufacturer warranty covering defects in materials and workmanship for control units.

Q: Does the temperature sensor come included? A: Yes, the WX232 temperature sensor with overheat protection is included. An optional secondary sensor (WX325) can be added for more precise temperature readings.

Q: Can I install this myself? A: No. All electrical installation must be carried out by a qualified electrician in accordance with BS 7671 and local building regulations. The unit requires three-phase 400V supply.

📥 Downloads & Resources

📄 C400VKK Installation & User Manual – Complete installation guide, wiring diagrams, and operating instructions

🏆 Why Choose the Harvia C400VKK

✅ Industry-Leading Capacity – Control heaters up to 40kW, suitable for the largest commercial saunas

✅ Finnish Engineering Heritage – Over 75 years of sauna expertise from the world’s leading manufacturer

✅ Comprehensive Facility Management – Unified control of heating, lighting, ventilation, and security

✅ Advanced Automation – Eight programmable schedules reduce operational workload and optimise energy use

✅ Proven Reliability – Evolution of the trusted C260 design with modern touch-screen convenience

✅ Professional Safety Standards – CE certified with multiple integrated protection systems

✅ Multi-Language Interface – Accessible to staff and users across European markets

✅ 2-Year Warranty – Comprehensive manufacturer backing for commercial installations

🤝 Why Buy from Parts4Tubs

✅ UK-Based Company – Local support and expertise you can rely on

✅ Fast UK Delivery – Get your equipment when you need it

✅ Expert Technical Advice – Specialist knowledge for sauna and spa equipment

✅ Competitive Pricing – Quality products at fair prices

✅ Full Warranty Support – We’re here to help throughout the warranty period

✅ Easy Returns – 30-day return policy for peace of mind

✨ Summary

The Harvia C400VKK delivers professional-grade control for commercial sauna heaters up to 40kW, combining Finnish manufacturing excellence with modern touch-screen convenience. With eight programmable weekly schedules, integrated lighting and ventilation control, comprehensive safety features, and CE certification, this controller is the definitive choice for housing complexes, hotels, spas, and wellness facilities requiring reliable, automated sauna management. Backed by Harvia’s 2-year warranty and Parts4Tubs expert UK support, the C400VKK transforms any commercial sauna into a fully automated, professionally operated wellness facility. Order today for fast UK delivery.