🌫️ Harvia HGD150XW 15kW WiFi Steam Generator – 8-28 m³ Capacity

The flagship of Finnish commercial steam power—delivering exceptional performance for large wellness facilities and demanding spa environments

🧖 Product Overview

The Harvia HGD150XW stands as the most powerful unit in the HGD WiFi range, delivering an exceptional 20.1 kg/hour of soft, enveloping steam from its 15kW heating system. Designed for the most demanding commercial environments, this flagship generator serves steam rooms from 8 to 28 cubic metres—from busy hotel spas to large hammam installations and high-traffic fitness facilities.

Built for relentless 24/7 commercial operation, the HGD150XW features Harvia’s proven heavy-duty construction with an oversized water container engineered for continuous high-frequency sessions throughout the day. The titanium heating elements deliver exceptional longevity even in hard water conditions, whilst the modular design ensures that every critical component can be serviced or replaced without replacing the entire unit—essential for commercial operations where minimising downtime is paramount.

The integrated Harvia Xenio WiFi touchscreen brings enterprise-level control to your steam operations. Through the MyHarvia smartphone app, facility managers can remotely activate generators, monitor temperatures across multiple rooms, schedule warm-up sequences to coincide with operating hours, and serialise multiple units for centralised control. With 75 years of Finnish sauna and spa expertise, the HGD150XW represents the pinnacle of commercial steam generation technology.

💫 Key Features

✅ 20.1 kg/h Steam Output – Industry-leading steam generation rapidly fills the largest commercial rooms and maintains consistent humidity even with frequent door opening and high client turnover

✅ MyHarvia WiFi Control – Enterprise-level smartphone operation enables remote monitoring, advance scheduling, and centralised management of multiple generators across your facility

✅ Commercial Flagship Design – Harvia’s most powerful HGD unit, built with reinforced construction and oversized water container for continuous 24/7 professional operation

✅ Titanium Heating Elements – Premium corrosion-resistant elements engineered for exceptional service life in commercial hard water environments and intensive daily use

✅ Stainless Steel Housing – Professional-grade exterior resists moisture damage and maintains its appearance through years of demanding commercial operation

✅ Xenio WiFi Touchscreen – Comprehensive control manages temperature, timing, delay start, lighting, ventilation, and aromatherapy with facility-wide integration capability

✅ Multi-Generator Serialisation – Control entire spa complexes from a single panel—essential for facilities with multiple treatment rooms

✅ Three-Phase 25A Power – 400V 3N~ connection with 25A fusing delivers reliable, efficient power for this high-output commercial unit

✅ Modular Serviceability – All critical components including heating elements, circuit boards, valves, and fragrance pumps are replaceable and cross-compatible across the Harvia range

✅ Auto-Drain Compatible – Optional automatic discharge valve enables hands-free maintenance, essential for busy commercial environments

✅ Aromatherapy Integration – Connect optional fragrance pump for signature spa experiences with variable scent intensity control

✅ CE & EAC Certified – Full European compliance ensures safety and quality across all commercial installations

🔩 Technical Specifications

Specification	Value
Model	HGD150XW
Power Rating	15 kW
Steam Output	20.1 kg/hour
Voltage	400V 3N~
Fuses (400V 3N~)	3 × 25 A
Supply Cable (400V 3N~)	5 × 2.5 mm²
Electrical Frequency	50/60 Hz
Room Capacity	8–28 m³ (varies by construction)
Dimensions (H × W × D)	435 × 460 × 220 mm
Weight (Empty)	11.8 kg
Water Inlet Pressure	2.0–4.0 bar
Water Inlet Connection	G¾” male
Drain Connection	G½” female
Temperature Range	30–55 °C
Timer Range	10 minutes–24 hours
Delay Start	10 minutes–12 hours
Ambient Temperature Range	10–30 °C
Storage Temperature Range	0–50 °C
Max Light Connection	100 W
Max Fan Connection	100 W
Max OUT1/OUT2 Power	50 W each
IP Rating	IPX2
Certifications	CE, EAC
Control Panel	Xenio WiFi Touchscreen
Control Panel Dimensions	85 × 24 × 110 mm
Control Unit Cable Length	5 m
Sensor Cable Length	5 m
Package Dimensions	500 × 220 × 580 mm
Gross Weight	14.6 kg
User Group	Professionals
Warranty (Domestic)	2 years
Warranty (Commercial)	1 year
EAN	6417659030991

📐 Room Sizing Guide

Principle: The Harvia HGD150XW at 15kW is designed for steam rooms between 8 and 28 cubic metres, with exact capacity depending significantly on wall construction, insulation quality, and ventilation configuration. This is Harvia’s most powerful standalone HGD unit, ideal for large commercial installations.

Official Harvia Room Size Recommendations:

Wall Construction Type	Recommended Room Size
Light wall (acrylic, etc.) – ventilated	8–13.5 m³
Tiled lightweight wall – ventilated	12–19.5 m³
Standard tiled wall – ventilated	10–16 m³
Tiled lightweight wall – unventilated	14–23 m³
Standard tiled wall – unventilated	12–18.5 m³
Tiled stone/masonry wall – unventilated	17–28 m³

Adjustment Factors:

Condition	Adjustment
Glass walls or doors	Add 1 m³ per m² of glass
Natural stone surfaces	Add 25–35% to total volume
High ceilings (above 2.4m)	Calculate additional volume
Poor insulation	Add 25–30% to total volume
Non-insulated masonry/concrete	Double the calculated volume
Very frequent door opening (high-traffic)	Reduce effective capacity by 20–25%

Worked Example:

📍 Example Room: 4.0m × 3.0m × 2.5m (hotel spa steam room)

• Base volume: 30.0 m³
• Fully tiled stone walls and benches
• HGD150XW 15kW: ⚠️ At the upper limit—suitable for stone/masonry construction. Consider HGP series for larger installations.

📍 Example Room: 3.5m × 2.5m × 2.4m (day spa group treatment room)

• Base volume: 21.0 m³
• Tiled walls, glass door (1.0m × 2.2m = 2.2 m²): +2.2 m³
• Total calculated: 23.2 m³
• HGD150XW 15kW: ✅ Excellent for tiled/stone construction with good margin

📍 Example Room: 3.0m × 3.0m × 2.5m (fitness centre steam room)

• Base volume: 22.5 m³
• Standard tiled walls, high traffic
• Commercial traffic reduction: -15%
• Effective capacity needed: ~19 m³
• HGD150XW 15kW: ✅ Ideal with ample capacity margin for busy commercial use

📍 Example Room: 5.0m × 4.0m × 2.6m (large hammam)

• Base volume: 52.0 m³
• HGD150XW 15kW: ❌ Exceeds capacity—consider multiple HGD units or HGP30XW

💷 Running Costs

Energy Rate Used: £0.245/kWh (UK average December 2024—verify current rates at Ofgem)

Cost Calculation Table:

Usage Level	Sessions/Week	Est. Hours/Year	Annual Cost
🏠 Heavy Home Use	6 × 45 min	~234	£860
🏋️ Light Commercial	15 × 45 min	~585	£2,150
🏨 Medium Commercial	25 × 45 min	~975	£3,583
💆 Heavy Commercial	40 × 45 min	~1,560	£5,733
♨️ Intensive Commercial	60 × 45 min	~2,340	£8,599

Calculation Formula:

Annual Cost = kW × Hours/Year × £0.245

Example (HGD150XW, Medium Commercial - 25 sessions/week × 45 min):
15 kW × 975 hours × £0.245 = £3,582.56

Per session cost (30-minute session):
15 kW × 0.5 hours × £0.245 = £1.84

Per session cost (45-minute commercial session):
15 kW × 0.75 hours × £0.245 = £2.76

💡 Commercial Efficiency Strategy: The WiFi scheduling capability allows precise warm-up timing aligned with operating hours, eliminating wasted energy during closed periods. The powerful 20.1 kg/h steam output provides rapid warm-up, potentially reducing per-session energy consumption compared to prolonged heating with lower-powered alternatives.

⚠️ Actual costs depend on usage patterns, session length, room size, insulation quality, and current energy rates.

⚡ Installation Requirements

Electrical Requirements:

Requirement	Specification
Voltage	400V 3N~
Fuse Rating	3 × 25 A
Cable Size	5 × 2.5 mm²
Dedicated Circuit	Required
RCD Protection	Required
Isolation Switch	Required (accessible for maintenance)

⚠️ Note: The HGD150XW requires 400V three-phase supply with 25A fusing—higher than the smaller HGD models. Ensure your facility’s electrical capacity can support this installation. A qualified electrician must assess supply requirements.

Location Requirements:

Requirement	Specification
Installation Location	Dry interior space only (use environment: Interior – dry area)
Mounting Position	Wall-mounted, vertical orientation
Safety Distance (Side)	250 mm minimum
Safety Distance (Ceiling)	200 mm minimum
Safety Distance (Floor)	150 mm minimum
Installation Opening	Minimum 1m × 1m access
Ventilation	Adequate airflow if enclosed in cabinet
Floor Drain	Required for discharge water

Steam Pipe Installation:

• Minimum internal diameter: 18 mm recommended for this output
• Material: Copper pipe recommended
• Steam nozzle height: 100–300 mm above floor
• Seal all pipe entries with silicone
• Multiple nozzles essential for rooms >15 m³

Temperature Sensor Placement:

• Install on steam room ceiling or wall
• Height: 1,700–3,000 mm above floor level
• Sensor cable length: 5 metres supplied
• Position away from supply air vents and steam nozzles

⚠️ 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. Commercial installations 
require Building Regulations approval and periodic electrical inspection 
certification. Never install where the generator may freeze or be exposed 
to harmful substances.

---

💧 Water Requirements

Water Supply:

Requirement	Specification
Water Pressure	2.0–4.0 bar
Flow Rate	8–12 litres/minute minimum
Inlet Connection	G¾” male thread
Water Type	Cold mains water
Stop Valve	Required on supply line

Drainage:

Requirement	Specification
Drain Connection	G½” female thread
Drain Type	Gravity drainage to floor drain
Auto-Drain Valve	Optional accessory (essential for commercial)
Floor Drain	Required (do not position generator directly above)

Water Quality Recommendations:

Parameter	Recommended Level
Manganese (Mn)	<0.05 mg/l
Calcium (Ca)	<100 mg/l
Chloride	<12 mg/l
Copper	<0.2 mg/l
Overall Hardness	Soft water essential

💧 Commercial Installation Essential: For this high-output commercial unit, a dedicated water softener system is not optional—it’s essential. The 20.1 kg/h steam output means significantly higher water throughput than smaller models, dramatically accelerating limescale formation in hard water areas. The automatic discharge valve (strongly recommended) combined with softened water provides the optimal configuration for reliable, low-maintenance commercial operation.

---

🔒 Safety Features & Certifications

Built-in Safety Systems:

• ✅ Low water level protection with automatic water intake
• ✅ Overpressure relief valve (never obstruct under any circumstances)
• ✅ Overheat protection with manual reset
• ✅ Programmable auto-shutoff timer (maximum 24 hours)
• ✅ Temperature regulation via external sensor
• ✅ Splash-proof construction (IPX2 rated)
• ✅ Power failure memory function (configurable: ON1, ON2, or OFF)
• ✅ Control panel lock function for public installations

Certifications:

• ✅ CE Marked—European Conformity
• ✅ EAC Certified—Eurasian Conformity
• ✅ IPX2 Rated—Protected against water drops when tilted up to 15°

Commercial Safety Requirements:

⚠️ Steam nozzles, pipes, and connections reach scalding temperatures during operation—install protective barriers in all public access areas

⚠️ Steam output is at boiling temperature—position nozzles to prevent any possibility of direct contact with seated users

⚠️ Never block, obstruct, or modify the overpressure valve under any circumstances

⚠️ Display appropriate multilingual safety signage in commercial steam rooms

⚠️ Ensure emergency stop controls are clearly marked and easily accessible

⚠️ Commercial installations must include legionella management protocols

⚠️ Consider CCTV monitoring outside the steam room for user safety

---

🎯 Ideal Applications

Application	Room Size	Typical Users	Suitability
🏨 Hotel Spa Steam Room	15–25 m³	6–12 people	✅ Ideal
♨️ Large Hammam	17–28 m³	8–15 people	✅ Ideal
🏋️ Gym/Fitness Centre	15–22 m³	8–12 people	✅ Ideal
💆 Day Spa Group Room	12–20 m³	6–10 people	✅ Ideal
🏢 Corporate Wellness	15–22 m³	8–12 people	✅ Ideal
🏥 Rehabilitation Facility	12–18 m³	6–10 people	✅ Ideal
🧖 Resort Spa	18–28 m³	10–15 people	✅ Ideal
🏠 Large Luxury Private Spa	12–18 m³	4–8 people	✅ Suitable

Best Suited For:

• Hotel and resort spa flagship steam rooms
• Large hammam and Turkish bath installations
• High-traffic gym and fitness centre facilities
• Day spa group treatment rooms
• Corporate wellness centres
• Rehabilitation and hydrotherapy facilities
• Luxury residential spa projects requiring commercial-grade power
• Any installation requiring maximum steam output with smart control

---

⚙️ Control Options & Accessories

Included Control System:

The Harvia Xenio WiFi touchscreen control panel comes as standard:

• Display: Touch-sensitive interface with LED status indicators
• Temperature Control: 30–55°C adjustable range
• Timer: 10 minutes to 24 hours continuous operation
• Delay Start: 10 minutes to 12 hours pre-programming
• Lighting Control: Up to 100W external lighting circuit
• Fan Control: Up to 100W ventilation fan circuit
• Additional Outputs: 2 × 50W auxiliary connections
• Fragrance Control: Variable intensity (when pump connected)
• Ventilation/Dehumidifying: ON, OFF, or DRY mode (60-minute cycle)
• WiFi Connectivity: MyHarvia app for iOS and Android
• Multi-Unit Control: Manage multiple steam generators from single panel
• Panel Lock: Prevents unauthorised adjustments in public areas
• Panel Dimensions: 85 × 24 × 110 mm
• Control Unit Cable Length: 5 metres
• Sensor Cable Length: 5 metres

Compatible Optional Accessories:

• Automatic discharge valve – Essential for commercial installations; enables programmable self-flushing after each session for hands-free maintenance
• Fragrance pump – Delivers aromatherapy directly into steam output with variable intensity control for signature spa experiences
• Additional steam nozzles – Required for rooms >15 m³ or complex layouts to ensure even steam distribution
• Water softener – Critical for all installations with this high-output unit—not optional for commercial use
• External lighting – Create atmospheric illumination controlled from the panel

---

🌿 Aromatherapy

The HGD150XW fully supports professional-grade aromatherapy integration:

• Integration: Direct connection to Xenio WiFi control panel
• Intensity Control: Variable fragrance strength adjustable via touchscreen or smartphone app
• Operation: Fragrance is injected into the steam pipe near the nozzle for even distribution throughout the room
• Commercial Programming: Configurable automated dosing for consistent signature experiences
• Oil Type: Water-soluble essential oils recommended
• Popular Commercial Fragrances: Eucalyptus, menthol, lavender, pine, citrus, mint, rosemary, chamomile, tea tree

💡 Commercial Tip: For large steam rooms, consider dual fragrance pump installation to ensure even scent distribution. The powerful steam output of the HGD150XW carries fragrances effectively throughout even the largest rooms, creating immersive wellness experiences that differentiate your facility.

---

❓ Frequently Asked Questions

Q: What size steam room will this generator heat? A: The HGD150XW is suitable for steam rooms between 8 and 28 cubic metres, depending on wall construction and insulation. This is Harvia’s most powerful standalone HGD unit, ideal for large commercial installations. Standard tiled rooms work optimally in the 12–22 m³ range.

Q: Is this the right choice for commercial use? A: Absolutely. The HGD150XW is classified by Harvia as a “Professional” grade product—their flagship HGD model. For very large installations (30+ m³) or extremely high-traffic environments, consider the HGP series with integrated auto-drain and fragrance pump.

Q: How quickly does it produce steam? A: With an exceptional 20.1 kg/hour steam output, the HGD150XW produces steam rapidly—typically within 10–20 minutes for appropriately sized rooms. This industry-leading output also ensures rapid recovery after door openings, essential for high-traffic commercial facilities.

Q: What electrical supply is required? A: The HGD150XW requires 400V three-phase supply with 3 × 25A fuses and 5 × 2.5 mm² cabling. This is higher than smaller HGD models due to the 15kW output. A qualified electrician must assess your facility’s supply capacity before installation.

Q: Can I control multiple steam rooms from one location? A: Yes, HGD steam generators can be serialised to manage multiple units from a single Xenio control panel. This is essential for spa complexes with several treatment rooms, enabling centralised monitoring and control of your entire steam room operation from one point.

Q: Is a water softener absolutely necessary? A: For this high-output commercial unit, yes—a water softener is essential regardless of your local water hardness. The 20.1 kg/h steam output means significantly higher water throughput than smaller models, dramatically accelerating limescale formation without softened water.

Q: What maintenance is required? A: For commercial installations, the automatic discharge valve is strongly recommended—it enables programmable self-flushing after each session. The sediment cup should be emptied regularly. All major components are designed for easy replacement, minimising downtime.

Q: What warranty coverage is provided? A: Harvia provides a 2-year warranty for domestic/private use and a 1-year warranty for commercial applications. All components are modular and replaceable, ensuring long-term serviceability and minimising any operational disruption.

📥 Downloads & Resources

 Harvia HGD XW Installation & User Manual – Complete installation guide with wiring diagrams, technical specifications, and operating instructions (available in English, German, French, Italian, Dutch, Spanish, Swedish, and Finnish

⭐ Why Choose the Harvia HGD150XW

• ✅ Maximum Steam Power – 15kW output with 20.1 kg/h steam generation—Harvia’s most powerful standalone HGD unit for the most demanding commercial environments
• ✅ Professional Classification – Harvia designates this unit exclusively for “Professionals”—built for heavy-duty 24/7 commercial operation in high-traffic facilities
• ✅ Finnish Engineering Heritage – 75 years of Harvia expertise in heat technology ensures reliability when your facility’s reputation depends on consistent performance
• ✅ Enterprise Control – WiFi capability and multi-unit serialisation enables centralised management of entire spa complexes
• ✅ Titanium Durability – Premium heating elements resist mineral buildup for extended service life in demanding commercial environments
• ✅ Future-Proof Investment – Modular design with cross-compatible components ensures decades of economical operation and easy serviceability

🤝 Why Buy from Parts4Tubs

• ✅ UK-based company with dedicated local customer support
• ✅ Fast UK delivery on in-stock items
• ✅ Expert advice from experienced steam room and spa specialists
• ✅ Competitive pricing with price-match commitment
• ✅ Full manufacturer warranty support and comprehensive after-sales service
• ✅ Commercial project consultation and specification assistance
• ✅ Installation partner network available
• ✅ Easy returns within 30 days for complete peace of mind

✨ Summary

The Harvia HGD150XW 15kW WiFi steam generator is the flagship of Finnish commercial steam power, delivering exceptional performance for steam rooms up to 28 m³. With industry-leading 20.1 kg/hour steam output, intelligent smartphone control via the MyHarvia app, and durable titanium heating elements, this professional-classified unit is the definitive choice for hotel spas, large hammams, busy fitness facilities, and prestigious wellness centres. The multi-generator serialisation capability enables centralised management of entire spa complexes. Backed by Harvia’s 75-year heritage of Finnish quality and Parts4Tubs’ expert UK support, the HGD150XW is engineered for demanding applications where exceptional performance and unwavering reliability are non-negotiable. Order today for fast delivery.