♨️ Harvia Virta HL110 11kW Sauna Heater – For Rooms 9-18 m³

Finnish-engineered powerhouse built for demanding saunas and frequent bathing

🔥 Product Overview

The Harvia Virta HL110 11kW Black Sauna Heater is a floor-standing electric heater engineered for those who take their sauna sessions seriously. Whether you’re outfitting a large home sauna or a professional spa facility, this Finnish-designed heater delivers the robust performance and reliability that Harvia is renowned for worldwide.

What sets the Virta apart is its innovative construction: the heating elements are physically separated from the stone compartment, dramatically extending element lifespan whilst enabling rapid, even heating. With an impressive 70kg stone capacity, this heater produces abundant, soft steam that traditional sauna enthusiasts crave. The front-mounted service hatch makes maintenance straightforward—you can access all connections without disturbing the stones.

Built from durable steel with a sleek black finish, the Virta HL110 combines industrial strength with contemporary aesthetics, complementing both traditional wood-panelled saunas and modern wellness spaces.

⭐ Key Features

✅ Separated Heating Elements – Elements isolated from stones, extending lifespan significantly and reducing maintenance frequency

✅ 70kg Stone Capacity – Generous stone mass produces soft, abundant steam with excellent heat retention for longer sessions

✅ Floor-Mounted Installation – Stable base with adjustable legs for precise levelling on any surface

✅ Front Service Hatch – All electrical connections accessible from the front without moving stones

✅ Robust Steel Construction – Heavy-duty steel body built for both domestic and commercial environments

✅ Quick Heating Time – Efficient air circulation design heats saunas rapidly, typically within 45-60 minutes

✅ IPX4 Splash Protection – Rated for wet sauna environments with water splashing

✅ CE Certified – Fully compliant with European safety standards

✅ External Control Compatible – Requires separate control unit (sold separately) for maximum flexibility

✅ Finnish Heritage – Designed and engineered in Finland, the birthplace of sauna culture

🔧 Technical Specifications

Specification	Value
Model Number	HL110400
Power Rating	11 kW
Voltage	400V 3-phase
Fuse Size	3 × 16 A
Cable Requirement	5 × 2.5 mm²
Room Capacity	9 – 18 m³
Dimensions (H × W × D)	810 × 415 × 410 mm
Net Weight	26.6 kg
Stone Capacity	70 kg
Stone Size	Ø 10-15 cm
Mounting Type	Floor-mounted
Control Type	External control unit required
IP Rating	IPX4
Electrical Frequency	50/60 Hz
Certifications	CE, EAC
Colour	Black
Material	Steel

📐 Room Sizing Guide

Basic Formula:

1 kW ≈ 1 - 1.5 m³ sauna room volume

Adjustment Factors:

Condition	Adjustment
Glass door/windows	+1.5 m³ per m² of glass
Uninsulated/log walls	+25-50% to volume
Outdoor/barrel sauna	+25-30% to volume
High ceiling (>2.3m)	Calculate additional volume

Worked Example:

📍 Example Room: 2.5m × 2.5m × 2.2m

• Base volume: 13.75 m³
• Glass door (0.8m × 2m = 1.6 m²): +2.4 m³
• Total calculated: 16.15 m³
• This 11 kW heater: ✅ Ideal for rooms 9-18 m³

💡 Tip: For optimal performance, size your heater towards the middle or upper end of its capacity range, especially if you enjoy long sessions or generous water throwing.

💷 Running Costs

Energy Rate Used: £0.2635/kWh (Ofgem Price Cap, October-December 2025)

Usage Level	Sessions/Week	Hours/Year	Annual Cost
🏠 Light Use	2	150	£435
🏠 Regular Use	4	300	£870
🧖 Heavy Use	6	450	£1,305

Calculation Formula:

Annual Cost = kW × Hours/Year × £0.2635

Example (11 kW heater, Regular Use):
11 kW × 300 hours × £0.2635 = £869.55

Per session cost: Approximately £4.35 per 1.5 hour session

⚠️ Actual costs depend on usage patterns, session length, room insulation, and current energy rates. Rates are subject to change—check Ofgem for the latest price cap information.

⚡ Installation Requirements

Electrical Requirements:

Requirement	Specification
Voltage	400V 3-phase (3N~)
Fuse Size	3 × 16 A
Cable Size	5 × 2.5 mm²
Dedicated Circuit	Required
Control Unit	External, sold separately

Minimum Clearances:

Position	Distance
Front	30 mm
Back	30 mm
Sides	30 mm
Ceiling	1100 mm
Minimum room height	1900 mm

Ventilation Requirements:

• Fresh air intake: Near floor level, close to heater (100mm from floor)
• Exhaust vent: Opposite wall, 150mm from ceiling or minimum 600mm from floor
• Air change rate: 5-6 times per hour recommended

⚠️ IMPORTANT: Installation must be carried out by a qualified electrician 
in accordance with BS 7671 (IET Wiring Regulations) and local building codes.
This heater requires a 3-phase electrical supply.

🛡️ Safety Features & Certifications

Built-in Safety:

✅ Thermal cut-out protection – Automatically disconnects if temperature exceeds safe limits

✅ Overheat protection – Manual reset required after activation for added safety

✅ IPX4 splash protection – Safe for wet sauna environments

✅ Separated heating elements – Reduces fire risk and extends element life

Certifications:

✅ CE Marked – European Conformity certification

✅ EAC – Eurasian Conformity certification

✅ IPX4 Rated – Protection against water splashes from all directions

🎯 Ideal Applications

Application	Room Size	Typical Capacity	Suitability
🏠 Large Home Sauna	10-15 m³	4-6 people	Excellent
🛖 Garden Room Sauna	12-18 m³	4-6 people	Excellent
🪵 Large Barrel Sauna	10-14 m³	4-6 people	Very Good
🧖 Small Spa Facility	12-18 m³	6-8 people	Excellent
🏋️ Gym/Fitness Centre	10-16 m³	4-6 people	Excellent
🏨 Boutique Hotel	12-18 m³	4-8 people	Excellent

🪨 Sauna Stones

• Stone Capacity: 70 kg
• Recommended Stone Size: Ø 10-15 cm diameter
• Stones Included: No (sold separately)
• Recommended Types: Peridotite, olivine-dolerite, or olivine
• Replacement Frequency: Every 1-2 years with regular use

💡 Stone Care Tips:

• Wash dust from stones before initial use
• Place stones loosely to allow air circulation
• Avoid stacking stones too high above the heater rim
• Inspect and rearrange stones at least annually
• Replace crumbling or deteriorated stones promptly

🎛️ Control Options & Accessories

Control System:

• Type: External control unit required (not included)
• Compatible Controllers: Harvia Xenio, C150, Griffin, or equivalent
• Temperature Range: 40-110°C (adjustable via control unit)
• Timer Function: Available via control unit

Compatible Accessories:

• Harvia Xenio CX110 Control Unit
• Harvia WiFi Module for app control
• Safety rail/guard (recommended for family use)
• Harvia sauna stones (70kg required)

❓ Frequently Asked Questions

Q: What size room will this heater work for? A: The Harvia Virta HL110 11kW is designed for sauna rooms between 9 and 18 m³. For rooms with glass doors, uninsulated walls, or outdoor installations, add 25-50% to your volume calculation when sizing.

Q: How long does it take to heat up? A: Typically 45-60 minutes to reach optimal bathing temperature (65-80°C), depending on room size, insulation quality, and ambient temperature.

Q: What electrical supply do I need? A: This heater requires a 400V 3-phase supply with 3 × 16A fuses and 5 × 2.5mm² cable. Professional installation by a qualified electrician is mandatory.

Q: Are sauna stones included? A: No, sauna stones are sold separately. You will need approximately 70kg of suitable sauna stones (Ø 10-15cm). We recommend high-quality olivine or peridotite stones.

Q: Is a control unit included? A: No, this is a heater-only unit. A separate control unit such as the Harvia Xenio is required to operate the heater.

Q: What is the warranty? A: Harvia provides a 1-year warranty for domestic use and 3-month warranty for commercial use. Contact Parts4Tubs for full warranty terms and conditions.

Q: Can I install this outdoors? A: The heater is designed for interior wet area use. For outdoor barrel or garden saunas, the heater must be installed inside a properly constructed and insulated sauna cabin, not exposed to the elements.

Q: Why are the heating elements separated from the stones? A: This innovative design extends element lifespan significantly, allows for faster heat-up times, and makes maintenance much easier—elements can be replaced without disturbing the stone arrangement.

📥 Downloads & Resources

📄 Product Data Sheet – Full specifications and technical drawings

📄 Installation & User Manual (EN/FR) – Complete installation guide and operating instructions

📄 Harvia Electric Heaters Brochure – Overview of the Harvia electric heater range

🏆 Why Choose the Harvia Virta HL110

✅ Finnish Engineering Excellence – Designed in Finland with over 75 years of sauna expertise

✅ Built for Frequent Use – Robust construction handles demanding domestic and commercial environments

✅ Low Maintenance Design – Separated elements and front service hatch minimise servicing time

✅ Abundant Steam Production – 70kg stone capacity delivers the soft, humid heat that sauna purists love

✅ Professional-Grade Performance – Classified for professional use whilst remaining suitable for serious home enthusiasts

✅ Future-Proof Flexibility – Compatible with Harvia’s range of digital controls including WiFi options

🤝 Why Buy from Parts4Tubs

✅ UK-Based Company – Local support from our Northamptonshire headquarters

✅ Expert Product Knowledge – Specialist advice from genuine sauna and spa enthusiasts

✅ Competitive Pricing – Fair prices backed by quality products

✅ Full Warranty Support – We handle warranty claims directly with manufacturers

✅ Fast UK Delivery – Quick dispatch on in-stock items

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

✨ Summary

The Harvia Virta HL110 11kW Black Sauna Heater delivers Finnish engineering excellence for sauna rooms from 9 to 18 m³. With its separated heating elements for extended lifespan, generous 70kg stone capacity for soft abundant steam, and robust steel construction, it’s the ideal choice for demanding home saunas and professional spa installations alike. CE certified, IPX4 rated, and backed by Harvia’s reputation for quality. Requires external control unit (sold separately). Order today from Parts4Tubs for fast UK delivery and expert support.