🌫️ Harvia HGX150XW 15kW WiFi Steam Generator – 8-28 m³ Capacity

Flagship 15kW Finnish steam power with smart connectivity for large commercial spas, hotels, and premium wellness facilities

💨 Product Overview

The Harvia HGX150XW represents the pinnacle of the HGX WiFi range, delivering a commanding 15kW of power and an exceptional 20.1 kg/h steam output for rooms up to 28 m³. This is commercial-grade performance engineered for the most demanding applications—large hotel spas, fitness centre steam rooms, hammam installations, and luxury residential projects where only the best will suffice.

Harvia, Finland’s world-leading sauna and spa manufacturer with over seven decades of expertise, has packed everything they know about steam generation into the HGX150XW. Despite its flagship status, it maintains the same compact 230 × 150 × 530 mm wall-mounted profile as smaller models, while the MyHarvia smartphone app and Xenio WiFi touchscreen deliver the sophisticated smart control that modern wellness facilities demand.

Built with robust steel construction and featuring Harvia’s proven sediment collection system, the HGX150XW handles the intensive daily operation that commercial environments require. For architects specifying premium wellness suites, spa operators expanding capacity, or discerning homeowners creating statement steam rooms, the HGX150XW delivers uncompromising performance backed by Finnish engineering excellence and comprehensive warranty coverage.

✨ Key Features

✅ 15kW Flagship Power – Generates an impressive 20.1 kg/h of soft, enveloping steam for rooms up to 28 m³

✅ MyHarvia WiFi App – Full remote control, real-time monitoring, and scheduling from iOS or Android devices

✅ Xenio WiFi Touchscreen – Premium control panel manages steam, fragrance, lighting, and ventilation from one interface

✅ Three-Phase Power Delivery – 400V 3N~ supply with 3 × 25A fuses ensures stable, efficient high-output operation

✅ Compact Despite Power – Same slim 230 × 150 × 530 mm footprint as smaller models for flexible installation

✅ Commercial-Grade Construction – Robust steel build engineered for intensive daily use in demanding environments

✅ 30-55°C Precision Control – Fine-tune steam room temperature to exact client or personal preferences

✅ Extended Timer Programming – Sessions from 10 minutes to 24 hours with delay start up to 12 hours

✅ Manual Discharge Valve – Standard fitting for routine maintenance; optional automatic drain available

✅ Aromatherapy Integration – Connect optional Harvia fragrance pump for signature scent experiences

✅ CE and EAC Certified – Full European safety approvals with IPX2 splash protection rating

✅ Comprehensive Warranty – 2 years domestic / 1 year commercial manufacturer coverage

🔧 Technical Specifications

Specification	Value
Model	HGX150XW
GTIN	6417659031554
Power Output	15 kW
Steam Output	20.1 kg/h
Room Capacity	8–28 m³ (varies by wall type)
Voltage	400V 3N~ (three-phase only)
Fuses (400V 3N~)	3 × 25 A
Supply Cable	5 × 2.5 mm²
Light Lead	1.5 mm²
Dimensions (H × W × D)	230 × 150 × 530 mm
Net Weight	10.2 kg
Temperature Range	30–55 °C
Timer Range	10 minutes – 24 hours
Delay Start	10 minutes – 12 hours
Water Pressure Required	1.5 – 4.0 bar
Water Inlet Connection	G¾” male
Water Outlet/Drain	G½” female
Steam Outlet Connection	Ø18 mm
Control Unit Cable Length	5.0 m
Sensor Cable Length	5.0 m
Max Light Connection	100 W
Max Fan Connection	100 W
Main Material	Steel
IP Rating	IPX2
Installation	Wall mounted
Certifications	CE, EAC
Warranty (Domestic)	2 years
Warranty (Commercial)	1 year

📏 Room Sizing Guide

The HGX150XW covers steam rooms from 8 to 28 m³, making it the go-to choice for large commercial installations and substantial residential projects. Your actual capacity depends on wall construction and ventilation configuration.

Room Volume by Wall Type

Wall Construction	Not Ventilated	Ventilated
Light wall (acrylic, glass, etc.)	17.0–28.0 m³	12.0–19.5 m³
Tiled light wall	14.0–23.0 m³	10.0–16.0 m³
Tiled stone wall	12.0–18.5 m³	8.0–13.5 m³

Understanding Capacity Variables

• Light walls (acrylic panels, glass enclosures, composite materials) retain heat efficiently for maximum room coverage
• Tiled light walls (ceramic or porcelain on standard substrates) absorb moderate heat during warm-up
• Tiled stone walls (marble, granite, slate, natural stone) absorb significant thermal energy—expect reduced capacity
• Ventilated rooms lose heat continuously through extraction systems, requiring more steam output per cubic metre

Sizing Worked Examples

📍 Example 1: Hotel spa steam room 4.0m × 3.0m × 2.4m with ceramic tiles

• Base volume: 4.0 × 3.0 × 2.4 = 28.8 m³
• Wall type: Tiled light wall, not ventilated
• HGX150XW capacity: 14.0–23.0 m³
• Result: ⚠️ At upper limit – consider multidrive configuration with two units

📍 Example 2: Luxury resort hammam 3.5m × 3.0m × 2.5m with glass feature walls

• Base volume: 3.5 × 3.0 × 2.5 = 26.25 m³
• Wall type: Light wall (glass), not ventilated
• HGX150XW capacity: 17.0–28.0 m³
• Result: ✅ Excellent match – within optimal range

📍 Example 3: Fitness centre steam room 4.0m × 2.5m × 2.4m with tiles and extraction

• Base volume: 4.0 × 2.5 × 2.4 = 24 m³
• Wall type: Tiled light wall, ventilated
• HGX150XW capacity: 10.0–16.0 m³
• Result: ❌ Too large for ventilated operation – requires multidrive configuration

📍 Example 4: Premium residential steam room 3.5m × 2.5m × 2.3m with marble finishes

• Base volume: 3.5 × 2.5 × 2.3 = 20.1 m³
• Wall type: Tiled stone wall, not ventilated
• HGX150XW capacity: 12.0–18.5 m³
• Result: ⚠️ Borderline – achievable but consider multidrive for optimal performance

📍 Example 5: Boutique hotel wellness suite 3.5m × 3.0m × 2.4m with porcelain tiles

• Base volume: 3.5 × 3.0 × 2.4 = 25.2 m³
• Wall type: Tiled light wall, not ventilated
• HGX150XW capacity: 14.0–23.0 m³
• Result: ⚠️ Near upper limit – suitable but allow extra warm-up time

📍 Example 6: Day spa treatment room 3.0m × 2.8m × 2.3m with ceramic tiles

• Base volume: 3.0 × 2.8 × 2.3 = 19.3 m³
• Wall type: Tiled light wall, not ventilated
• HGX150XW capacity: 14.0–23.0 m³
• Result: ✅ Good fit – comfortably within range

💡 Tip: The HGX150XW handles the largest single-generator installations in the HGX range. For rooms exceeding its capacity, the multidrive feature allows linking up to four units controlled from a single Xenio panel, enabling steam rooms up to 60kW combined output.

💷 Running Costs

Energy Rate Used: £0.245/kWh (UK average – verify current rates at ofgem.gov.uk)

Estimated Running Costs

Usage Pattern	Sessions/Week	Annual Hours	Annual Cost	Cost Per Session
🏠 Light Use	2	~50	£184	£3.68
🏠 Regular Use	4	~100	£368	£3.68
🧖 Heavy Use	6	~150	£551	£3.68

Cost Calculation

Per 30-minute session at full power:
15 kW × 0.5 hours × £0.245 = £1.84

Per 60-minute session at full power:
15 kW × 1.0 hours × £0.245 = £3.68

⚠️ Actual consumption varies based on room size, insulation quality, ambient temperature, and energy tariff. The generator cycles to maintain set temperature, so real-world usage typically runs 60-80% of rated power once the room reaches operating temperature.

Commercial Operating Economics

For wellness businesses, the HGX150XW delivers exceptional value despite its power consumption. At approximately £1.84–£3.68 per session in energy costs, operators serving multiple clients can generate substantial revenue against minimal running expenses. The robust construction minimises downtime and maintenance costs over the equipment’s lifespan.

Scenario	Energy Cost	Revenue Potential	Margin
Single 60-min session	~£3.68	£15–£30 typical	75-88%
Per client (shared session)	~£0.50–£1.00	£10–£20 typical	90-95%

⚡ Installation Requirements

Electrical Requirements

Requirement	Specification
Voltage	400V 3N~ (three-phase only)
Fuse Rating	3 × 25 A
Supply Cable	5 × 2.5 mm²
Dedicated Circuit	Required
RCD Protection	Required

Important: The HGX150XW requires a three-phase 400V electrical supply with 3 × 25A fuses—a higher rating than smaller HGX models. This is standard in commercial premises and available in many larger residential properties. Verify your electrical infrastructure with a qualified electrician before purchase.

Location Requirements

Requirement	Specification
Mounting	Wall mounted (horizontal)
Maximum steam pipe length	10 metres (properly insulated)
Steam pipe specification	15 mm internal diameter copper
Temperature sensor position	Ceiling or wall, 1700–3000 mm above floor
Sensor cable length	5.0 m (supplied)
Control panel cable length	5.0 m (supplied)
Ventilation	Adequate airflow around unit required
Access	Front panel removable for servicing

⚠️ IMPORTANT: Installation must be carried out by a qualified electrician 
and plumber in accordance with BS 7671 (IET Wiring Regulations), 
Water Supply Regulations, and local building codes. Three-phase supply 
with dedicated circuit (3 × 25A) and RCD protection is mandatory.

🚿 Water Requirements

Water Supply

Requirement	Specification
Water pressure	1.5 – 4.0 bar
Connection	G¾” male
Water type	Cold mains supply
Water quality	Soft water essential for commercial use

Drainage

Requirement	Specification
Drain connection	G½” female
Drain type	Gravity drain to floor waste
Manual discharge valve	Included as standard
Automatic drain valve	Strongly recommended for commercial

Water Hardness Guidance

Water Hardness	Recommendation
Soft (below 100 ppm)	Standard operation
Moderately hard (100–200 ppm)	Water softener recommended
Hard (200–300 ppm)	Water softener essential
Very hard (above 300 ppm)	Water softener mandatory

At 15kW output with maximum steam production, water quality is critical to operational reliability. Hard water rapidly accelerates limescale formation on heating elements, dramatically reducing efficiency and service life. For commercial installations, inline water treatment and automatic drain valves are considered essential—not optional. A service indicator illuminates after 200 hours of operation, prompting routine maintenance.

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🔒 Safety Features & Certifications

Built-in Safety Systems

• ✅ Overheat Protection – Automatic cut-off with manual reset prevents thermal damage
• ✅ Low Water Level Cut-off – Sensor prevents dry running and protects heating elements
• ✅ Pressure Relief Valve – Safety valve prevents dangerous over-pressurisation
• ✅ Maximum Timer Limit – Configurable up to 24 hours with automatic shut-off
• ✅ Power Failure Memory – Selectable restart behaviour (ON1/ON2/OFF modes) after interruptions
• ✅ Separate Water Measurement – Clean water measuring cup ensures accurate level readings

Certifications

Certification	Description
CE	European Conformity
EAC	Eurasian Conformity
IPX2	Protected against dripping water when tilted up to 15°

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🧖 Ideal Applications

The HGX150XW 15kW is engineered for large-scale and commercial installations:

Application	Typical Size	Capacity	Suitability
🏨 Hotel Spa Steam Room	17–25 m³	6–12 people	⭐ Excellent
🏋️ Fitness Centre Steam	14–20 m³	6–10 people	⭐ Excellent
💆 Day Spa/Wellness Centre	15–22 m³	5–10 people	⭐ Excellent
♨️ Commercial Hammam	14–18 m³	4–8 people	⭐ Excellent
🏢 Corporate Wellness Suite	15–23 m³	6–10 people	⭐ Excellent
🏠 Luxury Residential Spa	14–20 m³	4–8 people	✅ Good
🏨 Resort Wellness Facility	18–28 m³	8–15 people	✅ Good
🏋️ Sports Club Steam Room	16–22 m³	6–12 people	✅ Good

Perfect For

• Hotel and resort spa developments
• Fitness centre and health club operators
• Day spa and wellness centre businesses
• Hammam and Turkish bath installations
• Corporate wellness facility projects
• Luxury residential developments
• Architects specifying commercial-grade equipment
• Property developers fitting premium amenities
• Spa consultants and designers

Consider the HGX150XW When

• Your room exceeds 14 m³
• High-capacity commercial operation is planned
• Multiple simultaneous users are expected
• Fast warm-up and consistent temperature are essential
• You need the maximum single-unit output available

For Rooms Exceeding HGX150XW Capacity

The multidrive feature allows linking up to four Harvia HGX or HGP generators controlled from a single Xenio panel:

Configuration	Combined Output	Approximate Capacity
2 × HGX150XW	30 kW	34–56 m³
3 × HGX150XW	45 kW	51–84 m³
4 × HGX150XW	60 kW	68–112 m³

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⚙️ Control Options & Accessories

Included with HGX150XW

• ✅ Harvia HGX150XW steam generator unit
• ✅ Xenio WiFi touchscreen control panel
• ✅ Temperature sensor with 5.0 m cable
• ✅ Steam nozzle (1 piece)
• ✅ Manual discharge valve
• ✅ Sediment collection cup

Xenio WiFi Control Panel Features

Function	Capability
Temperature control	30–55 °C adjustable
Session timer	10 min – 24 hours
Delay start	10 min – 12 hours
Fragrance pump	Adjustable intensity (with optional pump)
Lighting control	Up to 100 W
Fan/ventilation	Up to 100 W with dehumidify mode
WiFi connectivity	MyHarvia app for iOS and Android
Multidrive	Control up to 4 linked generators

Multidrive Capability

For very large commercial installations, up to four Harvia HGX or HGP steam generators can be linked and controlled from a single Xenio panel. This makes the HGX150XW the building block for substantial commercial facilities:

• 2 units: 30kW combined for rooms up to ~56 m³
• 3 units: 45kW combined for rooms up to ~84 m³
• 4 units: 60kW combined for rooms up to ~112 m³

Compatible Accessories

Accessory	Model Code	Description
Fragrance Pump (Large)	HWF01XL	Essential oil injection system
Fragrance Pump (Medium)	HWF01M	Compact aroma delivery
Automatic Drain Valve	Optional	Automated flushing (recommended for commercial)
Steam Nozzle	ZG-500	Additional/replacement outlet

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🌿 Aromatherapy

Create signature scent experiences with optional fragrance injection:

Feature	Specification
Aromatherapy compatible	Yes (optional pump required)
Control	Via Xenio panel – adjustable intensity
Compatible pumps	HWF01XL (large), HWF01M (medium)
Recommended oils	Water-soluble essential oils for steam

Popular Commercial Aromatherapy Choices:

• Eucalyptus – Classic spa signature for respiratory wellness
• Lavender – Universal relaxation and calm
• Mint/Menthol – Invigorating post-workout coolness
• Citrus blends – Fresh, energising atmosphere
• Signature house blends – Create unique branded experiences

For commercial operations, aromatherapy provides a point of differentiation and enhances the perceived value of steam sessions.

❓ Frequently Asked Questions

Q: What size steam room suits the HGX150XW? A: The HGX150XW covers rooms from 8 to 28 m³, depending on wall materials and ventilation. With glass or acrylic walls and no ventilation, capacity reaches 28 m³. With tiled stone walls and ventilation, maximum reduces to approximately 13.5 m³. Refer to the sizing tables for your specific configuration.

Q: What electrical supply is required? A: The HGX150XW requires 400V three-phase supply with 3 × 25A fuses—note this is higher than the 3 × 16A required by smaller HGX models. This is standard in commercial premises. Verify your supply capacity with a qualified electrician before ordering.

Q: Is this suitable for commercial use? A: Absolutely—the HGX150XW is specifically designed for commercial applications. Harvia provides a 1-year commercial warranty, and the robust construction handles intensive daily operation. Many hotels, fitness centres, and spas specify this model for its reliability and performance.

Q: How does it compare to the HGX110XW? A: The HGX150XW produces 20.1 kg/h steam versus 14.6 kg/h from the HGX110XW—approximately 38% more output. This enables coverage of rooms up to 28 m³ versus 21 m³, with faster warm-up and better temperature recovery during busy periods.

Q: Can I control it remotely? A: Yes, all HGX WiFi models include MyHarvia app connectivity. Facility managers can monitor multiple steam rooms, start sessions remotely, schedule operations, and receive alerts—all from smartphone or tablet.

Q: How long does warm-up take? A: Warm-up depends on room size and construction. A typical 18-22 m³ well-insulated room reaches bathing temperature in approximately 20-30 minutes. The delay start feature allows scheduling sessions to be ready for opening times or specific appointments.

Q: Is water treatment necessary? A: For commercial installations, water treatment is essential—not optional. At 15kW output, hard water causes rapid scale buildup that significantly impacts performance and element lifespan. Inline water softening and automatic drain valves are strongly recommended.

Q: What’s included in the delivery? A: The HGX150XW includes the generator unit, Xenio WiFi control panel, temperature sensor (5m cable), steam nozzle, manual discharge valve, and sediment cup. Copper steam pipe (15mm ID) must be sourced separately.

Q: Can multiple units be linked? A: Yes, up to four Harvia HGX or HGP generators can be connected via multidrive and controlled from a single Xenio panel. This enables configurations up to 60kW for very large commercial steam rooms.

Q: What warranty applies? A: Harvia provides a 2-year warranty for domestic use and 1-year for commercial installations. Warranty requires proper installation and adherence to maintenance schedules per the manual.

Q: Can this unit be used residentially? A: Yes, though it’s typically specified for larger luxury residential projects where substantial steam output is required. The 2-year domestic warranty applies. Ensure your property has three-phase supply with adequate capacity.

📋 Downloads & Resources

 Installation & User Manual – Wiring diagrams, setup, and operation Available from harvia.com

🏆 Why Choose the Harvia HGX150XW

• ✅ Maximum Single-Unit Power – 15kW delivers 20.1 kg/h for rooms up to 28 m³
• ✅ Finnish Engineering Excellence – 70+ years of Harvia innovation and expertise
• ✅ Commercial-Grade Build – Steel construction engineered for intensive daily operation
• ✅ Smart Connected Control – WiFi and app integration for professional facility management
• ✅ Scalable via Multidrive – Link up to 4 units for large-scale installations
• ✅ Compact Despite Output – Same slim footprint enables flexible plant room layouts
• ✅ Proven Reliability – Trusted by hotels, spas, and fitness centres worldwide
• ✅ Comprehensive Safety – Full protection systems with CE/EAC certification
• ✅ Professional Support – Dedicated commercial warranty and service network
• ✅ Future-Proof Investment – Robust design delivers years of dependable service

🤝 Why Buy from Parts4Tubs

• ✅ UK-based company with knowledgeable technical support
• ✅ Fast UK delivery on in-stock items
• ✅ Expert advice from commercial steam room specialists
• ✅ Competitive pricing on genuine Harvia products
• ✅ Full manufacturer warranty support
• ✅ Hassle-free returns within 30 days
• ✅ Commercial and trade accounts available
• ✅ Project quotations for multi-unit installations

⭐ Summary

The Harvia HGX150XW 15kW WiFi Steam Generator stands as the flagship of the HGX range, delivering commanding 20.1 kg/h steam output for large commercial spas, hotel wellness facilities, fitness centres, and premium residential installations up to 28 m³. Three-phase 400V power with 3 × 25A fuses ensures stable operation at peak demand, while MyHarvia app connectivity and Xenio touchscreen controls provide sophisticated facility management capabilities. With multidrive functionality enabling configurations up to 60kW, CE/EAC certification, commercial-grade steel construction, and Harvia’s 70+ years of Finnish expertise, the HGX150XW is the professional’s choice for demanding steam room applications. Order from Parts4Tubs for fast UK delivery, competitive trade pricing, and expert commercial support.