♨️ Harvia Moderna V80XE 8.0kW Sauna Heater – Black with Xenio Digital Controls – 7–12 m³ Capacity

Precision digital heating with award-winning Finnish design — the heater that knows your perfect temperature.

🔥 Product Overview

The Harvia Moderna V80XE is the flagship of Harvia’s domestic electric heater range — an 8 kW sauna heater that pairs striking Scandinavian design with precision digital temperature control accurate to a single degree. Manufactured in Finland by the world’s leading sauna and spa company, the Moderna is purpose-built for sauna rooms between 7 and 12 m³.

What sets the Moderna apart is its integrated Xenio XE digital control panel. Unlike heaters with basic manual dials, the Moderna lets you set your exact preferred temperature (adjustable from 40°C to 110°C), programme delay timers, and monitor real-time sauna temperature on a clear digital display — all from a compact illuminated touch-key panel that can be mounted inside the sauna itself.

Everything connects directly to the heater: control panel, temperature sensor, door sensor, and safety switch. There is no need for a separate contactor box or control unit installed in a dry room, which dramatically simplifies installation whether you are building a new sauna or upgrading an existing one. The Moderna XE is also WiFi-upgradable via the optional Xenio WiFi accessory, letting you start and control your sauna from your phone using the MyHarvia app.

The sleek black steel body is as much a design statement as it is a heater. With short safety clearances and a compact 580 × 410 × 310 mm footprint, the Moderna is particularly well suited for bench embedding — creating a seamless, modern sauna interior.

⭐ Key Features

✅ 8 kW Power Output – Heats sauna rooms from 7 to 12 m³ efficiently and quickly, ideal for family-sized home saunas, garden cabins, and private wellness spaces.

✅ Xenio XE Digital Control Panel – Illuminated touch-key controls with a digital temperature display, adjustable from 40°C to 110°C with single-degree accuracy.

✅ Programmable Timer and Delay Start – Set the heater’s operating time and programme a delay so your sauna is ready exactly when you want it.

✅ WiFi Upgradable – Add the optional Xenio WiFi accessory to control your sauna remotely via the MyHarvia smartphone app.

✅ Remote Start Capable – Safety equipment (door sensor, safety switch) connects directly to the heater, enabling safe remote start without additional wiring to a dry room.

✅ Bench Embedding Ready – Short safety clearances (30 mm front, 70 mm sides) and compact dimensions make the Moderna ideal for integrating into sauna benches for a clean, modern look.

✅ All-In-One Installation – Control panel, sensor, and safety connections all run directly to the heater body — no separate contactor box or dry-room control unit required.

✅ Sleek Black Steel Design – The contemporary black finish makes the Moderna a striking design element in any sauna interior.

✅ 20 kg Stone Capacity – Generous stone bed for excellent heat retention and satisfying löyly (steam) when water is poured over the stones.

✅ IPX4 Splash-Proof Rated – Certified for reliable use in wet sauna environments.

✅ CE and EAC Certified – Fully compliant with European and Eurasian safety standards.

📊 Technical Specifications

Specification	Value
Model / Type Code	V80XE
Harvia Article Number	HVE804XEM
Power Output	8 kW
Voltage Options	230V 3~ or 400V 3N~
Fuse Rating (400V 3N~)	3 × 16 A
Fuse Rating (230V 1N~)	1 × 35 A
Supply Cable (400V 3N~)	5 × 2.5 mm²
Supply Cable (230V 1N~)	3 × 6 mm²
Electrical Frequency	50/60 Hz
Control Type	Xenio XE digital control panel (stand-alone, connects to heater)
Temperature Range	40–110°C (single-degree accuracy)
Remote Use	Yes (with door sensor and safety switch)
WiFi Capability	Upgradable via Xenio WiFi accessory (MyHarvia app)
Room Capacity	7–12 m³
Dimensions (H × W × D)	580 × 410 × 310 mm
Control Panel Dimensions	110 × 85 × 24 mm
Net Weight	15 kg
Stone Capacity	20 kg
Recommended Stone Size	Ø 5–10 cm
IP Rating	IPX4
Installation	Wall-mounted or floor-standing (vertical)
Minimum Room Height	2,000 mm
Control Panel Cable Length	5 m
Sensor Cable Length	4 m
User Group	Households
Use Environment	Interior – wet area
Certifications	CE, EAC

📏 Room Sizing Guide

The Harvia Moderna V80XE is designed for sauna rooms between 7 m³ and 12 m³. To determine whether this heater suits your sauna, calculate your room volume and apply the appropriate adjustment factors.

Basic Formula:

Room Volume = Length (m) × Width (m) × Height (m)

Adjustment Factors:

Condition	Adjustment
Glass door or windows	Add +1.5 m³ per m² of glass
Uninsulated or log walls	Add +25–50% to calculated volume
Outdoor or barrel sauna	Add +25–30% to calculated volume
Ceiling height above 2.3 m	Add the extra volume above 2.3 m

Worked Example:

📍 Example Room: 2.2 m × 1.8 m × 2.1 m

• Base volume: 8.32 m³
• Glass door (0.8 m × 2.0 m = 1.6 m²): +2.4 m³
• Total calculated volume: 10.72 m³
• This 8 kW heater covers 7–12 m³: ✅ Well suited

📍 Example Room: 2.5 m × 2.2 m × 2.3 m

• Base volume: 12.65 m³
• No glass, well-insulated walls
• Total calculated volume: 12.65 m³
• This 8 kW heater covers 7–12 m³: ⚠️ Borderline — consider the 9 kW Moderna V90XE for additional headroom

💡 Always account for glass surfaces and wall insulation when sizing your heater. The Moderna’s digital controls will maintain a steady temperature once the sauna reaches your target, but the heater must be correctly sized for the room to reach that temperature efficiently.

💰 Running Costs

Energy Rate Used: £0.277/kWh — Ofgem Price Cap, Q1 2026 (January–March 2026, UK average, Direct Debit, inclusive of VAT)

Usage Level	Sessions/Week	Approx. Hours/Year	Annual Cost
🏠 Light Use	2	150	£332
🏠 Regular Use	4	300	£664
🧖 Heavy Use	6	450	£997

Calculation Formula:

Annual Cost = Power (kW) × Hours per Year × Unit Rate (£/kWh)

Example (8 kW heater, Regular Use):
8 kW × 300 hours × £0.277 = £664.00 per year

Per session cost (1.5-hour session):
8 kW × 1.5 hours × £0.277 = £3.32 per session

💡 The Moderna’s digital thermostat automatically modulates heating output to maintain your set temperature, meaning actual energy consumption may be lower than the maximum 8 kW rating during sustained use.

🔌 Installation Requirements

Electrical Requirements:

Requirement	400V 3N~ (Three-Phase)	230V 1N~ (Single-Phase)
Voltage	400V 3N~	230V 1N~
Fuse Rating	3 × 16 A	1 × 35 A
Supply Cable	5 × 2.5 mm²	3 × 6 mm²
Dedicated Circuit	Required	Required

Minimum Safety Clearances:

Position	Distance
Front (combustible and non-combustible materials)	30 mm
Side walls (left and right, combustible and non-combustible)	70 mm
Ceiling	1,100 mm
Floor	150 mm
Minimum room height	2,000 mm

Control Panel and Sensor Cabling:

• Control panel cable length: 5 m (RJ10 4P4C connection)
• Temperature sensor cable length: 4 m
• All connections (control panel, door sensor, safety switch, temperature sensor) run directly to the heater — no separate dry-room control unit or contactor box required

Ventilation:

• Fresh air intake and exhaust venting must be provided in accordance with the installation manual.

⚠️ IMPORTANT: Installation must be carried out by a qualified electrician in accordance with BS 7671 (IET Wiring Regulations) and local building codes. At 8 kW, three-phase supply (400V 3N~) is recommended for optimal cable sizing.

🛡️ Safety Features and Certifications

Built-in Safety:

• ✅ Overheat protection — automatically cuts power if temperatures exceed safe limits
• ✅ Door sensor integration — heater can be configured to shut off when sauna door is opened (for remote start safety)
• ✅ Safety switch connection — integrates directly into the heater for remote-use compliance
• ✅ Digital timer with automatic shutoff — prevents accidental prolonged operation
• ✅ Electronic temperature sensor — maintains accurate, stable temperature throughout the session

Certifications:

• ✅ CE Marked — European conformity
• ✅ EAC Certified — Eurasian conformity
• ✅ IPX4 Rated — protected against water splashes from all directions

🎯 Ideal Applications

Application	Room Size	Notes
🏠 Family Home Sauna	7–12 m³	Ideal for dedicated indoor sauna rooms with precision temperature control
🛖 Garden Sauna	7–10 m³	Well suited for insulated outdoor cabins (add 25–30% volume adjustment)
🧖 Private Wellness Room	8–12 m³	Premium heater for bespoke wellness spaces where design matters
🏋️ Home Gym Sauna	7–12 m³	Programme your sauna to be ready after your workout using the delay timer
🏡 Luxury Home Installation	7–12 m³	Bench-embedded Moderna with WiFi control for a high-end sauna experience

💡 The Moderna V80XE is classified by Harvia for household use. For high-traffic commercial environments, consider a heater from Harvia’s commercial range.

🪨 Sauna Stones

• Stone Capacity: 20 kg
• Recommended Stone Size: Ø 5–10 cm diameter
• Stones Included: No — stones must be purchased separately
• Recommended Type: Olivine diabase, peridotite, or vulcanite (natural sauna stones designed for high heat and water contact)
• Replacement Frequency: Inspect annually; replace every 1–2 years with regular use

Stone Loading Tips:

• Heating elements must be completely covered by stones
• Place stones loosely to allow adequate airflow between them
• Do not force oversized stones into the stone cavity
• Remove any broken or disintegrated stone fragments during inspections to maintain optimal heating performance

⚙️ Control System and Accessories

Xenio XE Digital Control Panel (Included):

Feature	Details
Display	Digital temperature readout with illuminated touch keys
Temperature Range	40–110°C (single-degree precision)
Timer	Adjustable operating time
Delay Start	Programmable pre-set start time
Mounting	Inside the sauna (doubles as a digital thermometer) or nearby
Panel Dimensions	110 × 85 × 24 mm
Cable Length	5 m (RJ10 4P4C)

WiFi Upgrade (Optional):

• Add the Xenio WiFi accessory to enable remote control via the MyHarvia smartphone app
• Start your sauna, set temperature, and monitor status from anywhere

Included in the Box:

• Harvia Moderna V80XE heater unit (black)
• Xenio XE digital control panel
• Control panel cable (5 m, RJ10 4P4C)
• Control panel frame
• Installation bracket
• Temperature sensor and cable (4 m)
• Installation and operating instructions

Compatible Accessories:

• Xenio WiFi module (for MyHarvia app control)
• Door sensor (for remote start safety)
• Safety switch (for remote start compliance)
• Bench embedding flange

❓ Frequently Asked Questions

Q: What size room will this heater work for? A: The Harvia Moderna V80XE is designed for sauna rooms between 7 and 12 m³. If your room has glass doors, windows, or uninsulated walls, add 25–50% to your volume calculation to determine effective room size.

Q: How does the digital control panel work? A: The included Xenio XE panel features illuminated touch keys and a digital display. You can set your exact preferred temperature (40–110°C), adjust operating time, and programme a delay start so the sauna is ready when you want it. The panel can be mounted inside the sauna, where it also functions as a digital thermometer.

Q: Can I control this heater from my phone? A: Yes, with the optional Xenio WiFi accessory (sold separately). Once fitted, you can use the MyHarvia smartphone app to start the heater, set temperature, and monitor your sauna remotely.

Q: What electrical supply do I need? A: The V80XE can operate on 400V three-phase (3 × 16A fuses, 5 × 2.5 mm² cable) or 230V single-phase (1 × 35A fuse, 3 × 6 mm² cable). A dedicated circuit and professional installation by a qualified electrician are required.

Q: Do I need a separate control unit in a dry room? A: No. The Moderna XE is designed so that all connections — control panel, sensors, safety switches — run directly to the heater. There is no need for a separate contactor box or control unit outside the sauna.

Q: Are sauna stones included? A: No, stones must be purchased separately. The V80XE holds up to 20 kg of sauna stones, sized Ø 5–10 cm. High-quality olivine diabase or vulcanite stones are recommended.

Q: Can the heater be embedded into the bench? A: Yes. The Moderna’s compact dimensions and short safety clearances (30 mm front, 70 mm sides) make it particularly well suited for bench embedding. Refer to the installation manual for embedding requirements.

Q: What is the warranty? A: Harvia provides a 1-year warranty on heating elements and a 5-year warranty on other components. Contact Parts4Tubs for full warranty terms and conditions.

Q: Can I install this heater outdoors? A: The V80XE is rated for interior wet-area use only. It can be installed inside a well-insulated outdoor sauna cabin, but the heater itself must be protected from direct weather exposure.

📋 Downloads and Resources

📄 Product Datasheet — Moderna V80XE Black (HVE804XEM) — Full specifications and dimensions

🏆 Why Choose the Harvia Moderna V80XE

✅ Precision Digital Temperature Control — Set your sauna to the exact degree you prefer, from 40°C to 110°C, with the Xenio XE digital panel maintaining a rock-steady temperature throughout your session.

✅ WiFi-Ready Smart Sauna — Upgrade with the optional Xenio WiFi module to control your sauna from your phone via the MyHarvia app — start heating before you get home.

✅ Simplified Installation — All connections run directly to the heater. No separate contactor box, no dry-room control unit — just connect and go.

✅ Design-Led Finnish Engineering — The Moderna’s sleek black steel body and compact dimensions are designed to complement modern sauna interiors, including bench embedding.

✅ Built for Longevity — Harvia’s patented heating technology and robust steel construction ensure years of reliable, consistent performance.

✅ Certified and Safe — CE marked, EAC certified, IPX4 rated, with integrated safety switch and door sensor connections for complete peace of mind.

🤝 Why Buy from Parts4Tubs

✅ UK-based company with dedicated local support

✅ Fast UK delivery on stocked items

✅ Expert advice from sauna and wellness specialists

✅ Competitive pricing on genuine Harvia products

✅ Full manufacturer warranty support

✅ Easy returns within 30 days

🌟 Summary

The Harvia Moderna V80XE delivers 8 kW of precision-controlled Finnish heating for sauna rooms between 7 and 12 m³. Its included Xenio XE digital control panel provides single-degree temperature accuracy, programmable timers, and optional WiFi upgrade for smartphone control via the MyHarvia app. With a sleek black steel body, compact bench-embedding dimensions, and simplified all-in-one installation, the Moderna is the premium choice for discerning sauna owners who want both performance and design. CE certified, IPX4 rated, and backed by Harvia’s component warranty — order from Parts4Tubs today for fast UK delivery and expert support.