♨️ Harvia HGD45XW 4.5kW WiFi Steam Generator – 2-7 m³ Capacity

Finnish-engineered steam excellence with smartphone control for the ultimate home or light commercial steam room experience

🧖 Product Overview

The Harvia HGD45XW represents the pinnacle of Finnish steam generator engineering, delivering soft, luxurious steam at the touch of a button—or from anywhere using your smartphone. With over 75 years of expertise in heat technology, Harvia has created a generator that combines robust construction with intelligent WiFi connectivity.

This 4.5kW unit is ideally suited for compact steam rooms between 2 and 7 cubic metres, making it perfect for residential bathrooms, home wellness spaces, or light commercial applications. The stainless steel construction houses durable titanium heating elements designed to withstand mineral-rich water conditions whilst requiring minimal maintenance.

The included Harvia Xenio WiFi touchscreen control panel offers intuitive operation and integrates seamlessly with the MyHarvia app, allowing you to preheat your steam room whilst still at work or enjoying a workout. Control temperature, session duration, lighting, ventilation, and aromatherapy all from one elegant interface.

⭐ Key Features

✅ WiFi Connectivity with MyHarvia App – Start your steam room remotely and monitor temperature from your smartphone, ensuring your steam session is ready when you are

✅ Titanium Heating Elements – Superior corrosion resistance guarantees durability even in hard water areas and heavy-duty spa conditions

✅ Stainless Steel Construction – Premium-grade steel housing ensures longevity, easy cleaning, and resistance to the demanding steam room environment

✅ Xenio WiFi Touchscreen Control Panel – Elegant, intuitive interface controls temperature, timing, lighting (100W max), ventilation (100W max), and fragrance intensity

✅ 5.5 kg/h Steam Output – Delivers consistent, soft steam to fill rooms up to 7 m³ with soothing moisture

✅ Modular Component Design – Heating elements, circuit boards, relays, valves, and fragrance pump are all replaceable and compatible with other Harvia models

✅ Flexible Power Options – Operates on 230V single-phase or 400V three-phase supply to suit various installation requirements

✅ Comprehensive Timer System – On-time up to 24 hours with delay start up to 12 hours for complete scheduling flexibility

✅ Auto-Drain Compatible – Optional automatic discharge valve simplifies maintenance and prevents limescale buildup

✅ Aromatherapy Ready – Optional fragrance pump integration for enhanced wellness experiences

✅ CE & EAC Certified – Meets European safety and quality standards for complete peace of mind

✅ 2-Year Domestic Warranty – Harvia’s commitment to quality backed by comprehensive warranty coverage

🔧 Technical Specifications

Specification	Value
Model	HGD45XW
Power Rating	4.5 kW
Steam Output	5.5 kg/hour
Voltage Options	230V 1N~ / 400V 3N~
Fuse (230V 1N~)	25 A
Fuses (400V 3N~)	3 × 10 A
Supply Cable (230V 1N~)	3 × 6 mm²
Supply Cable (400V 3N~)	5 × 1.5 mm²
Electrical Frequency	50/60 Hz
Room Capacity	2–7 m³
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
Max Light Connection	100 W
Max Fan Connection	100 W
IP Rating	IPX2
Certifications	CE, EAC
Control Panel	Xenio WiFi Touchscreen
Control Panel Dimensions	85 × 24 × 110 mm
Sensor Cable Length	5 m
Warranty (Domestic)	2 years
Warranty (Commercial)	1 year

📐 Room Sizing Guide

Basic Principle: The Harvia HGD45XW at 4.5kW is designed for steam rooms between 2 and 7 cubic metres, depending on wall construction and insulation levels.

Recommended Room Sizes by Construction:

Wall Type	Recommended Room Size
Light wall (acrylic/glass, ventilated)	2–3.5 m³
Tiled lightweight wall	2–5 m³
Tiled standard construction	2–7 m³
Non-insulated masonry/stone	Double the calculation

Adjustment Factors:

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

Worked Example:

📍 Example Room: 1.8m × 1.5m × 2.2m (compact home steam shower)

• Base volume: 5.94 m³
• Glass door (0.7m × 2m = 1.4 m²): +1.4 m³
• Total calculated: 7.34 m³
• HGD45XW 4.5kW: ✅ Suitable at upper capacity—consider excellent insulation or the 5.7kW model for heavy use

📍 Example Room: 1.5m × 1.2m × 2.1m (small bathroom conversion)

• Base volume: 3.78 m³
• Tiled walls throughout
• Total calculated: 3.78 m³
• HGD45XW 4.5kW: ✅ Ideal sizing with capacity to spare

💷 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
🏠 Light Use	2 × 30 min	~52	£57
🏠 Regular Use	4 × 30 min	~104	£115
🧖 Heavy Use	6 × 45 min	~234	£258

Calculation Formula:

Annual Cost = kW × Hours/Year × £0.245

Example (HGD45XW, Regular Use - 4 sessions/week × 30 min):
4.5 kW × 104 hours × £0.245 = £114.66

Per session cost (30-minute session):
4.5 kW × 0.5 hours × £0.245 = £0.55

💡 Cost-Saving Tip: The WiFi connectivity means you can precisely time your warm-up period rather than leaving the generator running unnecessarily. Most steam rooms reach operating temperature within 15–20 minutes.

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

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⚡ Installation Requirements

Electrical Requirements:

Requirement	230V Single-Phase	400V Three-Phase
Voltage	230V 1N~	400V 3N~
Fuse Rating	25 A	3 × 10 A
Cable Size	3 × 6 mm²	5 × 1.5 mm²
Dedicated Circuit	Required	Required
RCD Protection	Required	Required

Location Requirements:

Requirement	Specification
Installation Location	Dry interior space only
Maximum Ambient Temperature	30°C
Mounting Position	Wall-mounted, vertical orientation
Safety Distance (Side)	250 mm minimum
Safety Distance (Ceiling)	200 mm minimum
Safety Distance (Floor)	150 mm minimum
Ventilation	Adequate airflow required if enclosed
Floor Drain	Required for discharge water

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

⚠️ 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. The generator must 
not be installed where it may freeze or be exposed to harmful substances.

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💧 Water Requirements

Water Supply:

Requirement	Specification
Water Pressure	2.0–4.0 bar
Flow Rate	8–12 litres/minute recommended
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
Floor Drain	Required (do not install directly above)

Water Quality Recommendations:

Parameter	Recommended Level
Manganese (Mn)	<0.05 mg/l
Calcium (Ca)	<100 mg/l
Overall Hardness	Soft water preferred

💧 Hard Water Advisory: In areas with water hardness above 100 ppm calcium, a water softener is strongly recommended to prevent limescale buildup, extend element life, and reduce maintenance frequency. The sediment cup collects impurities for easy removal during routine maintenance.

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🛡️ Safety Features & Certifications

Built-in Safety Systems:

• ✅ Low water level protection with automatic refill
• ✅ Overpressure relief valve (never block this valve)
• ✅ Automatic shutoff via programmable timer (max 24 hours)
• ✅ Temperature regulation with sensor monitoring
• ✅ Splash-proof construction (IPX2 rated)
• ✅ Memory function for power failure recovery (configurable)
• ✅ Panel lock function to prevent unauthorised adjustments

Certifications:

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

Safety Warnings:

⚠️ Steam nozzles, pipes, and faucets become scalding hot during operation—never touch with bare skin

⚠️ Steam emitted from nozzles is boiling hot—maintain safe distance

⚠️ Never block the overpressure valve under any circumstances

⚠️ Young children, elderly persons, pregnant women, or those with medical conditions should consult a healthcare professional before steam bathing

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🎯 Ideal Applications

Application	Room Size	Typical Users	Suitability
🏠 Home Steam Shower	2–4 m³	1–2 people	✅ Ideal
🚿 Bathroom Steam Room	3–5 m³	1–2 people	✅ Ideal
🧖 Compact Home Spa	4–6 m³	2–3 people	✅ Suitable
🏋️ Small Gym Steam Room	5–7 m³	2–4 people	✅ Suitable (light use)
🏨 Boutique Hotel Suite	3–5 m³	1–2 people	✅ Suitable

Best Suited For:

• Residential steam shower conversions
• Master bathroom wellness additions
• Compact home spa installations
• Light commercial applications with intermittent use
• Properties where 230V single-phase installation is preferred

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🎛️ Control Options & Accessories

Included Control System:

The Harvia Xenio WiFi touchscreen control panel comes as standard with the HGD45XW:

• Display: Touch-sensitive with LED indicators
• Temperature Control: 30–55°C adjustable
• Timer: 10 minutes to 24 hours continuous operation
• Delay Start: 10 minutes to 12 hours pre-programming
• Lighting Control: Up to 100W external lighting
• Fan Control: Up to 100W ventilation fan
• Fragrance Control: Variable intensity when pump connected
• WiFi Connectivity: MyHarvia app for remote operation
• Panel Dimensions: 85 × 24 × 110 mm
• Cable Length: 1.5 metres to generator

Compatible Optional Accessories:

• Automatic discharge valve—simplifies maintenance with timed flushing
• Fragrance pump—delivers aromatherapy essences into steam
• Steam nozzle (1 included)—additional nozzles available for larger installations
• Water softener—recommended for hard water areas

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🌿 Aromatherapy

The HGD45XW is fully aromatherapy-compatible when paired with the optional Harvia fragrance pump:

• Compatibility: Full integration with Xenio WiFi control panel
• Intensity Control: Variable fragrance strength via touchscreen
• Oil Type: Water-soluble essential oils recommended
• Popular Choices: Eucalyptus, menthol, lavender, pine, citrus

The fragrance pump connects directly to the steam generator and disperses aromatic essences into the steam output, creating an immersive spa atmosphere. Control the intensity from the touchscreen panel or remotely via the MyHarvia app.

💡 Tip: Start with lower fragrance intensity and adjust to preference—steam carries scents more effectively than dry air.

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❓ Frequently Asked Questions

Q: What size steam room will this generator heat? A: The HGD45XW is suitable for steam rooms between 2 and 7 cubic metres with standard tiled construction. For rooms with extensive glass, natural stone, or poor insulation, reduce the maximum capacity or add appropriate compensation to your volume calculation.

Q: How long does it take to produce steam? A: The generator typically reaches operating temperature and begins producing steam within 15–20 minutes, depending on room size and ambient conditions. The WiFi connectivity allows you to start warm-up remotely.

Q: Can I control it from my phone? A: Yes, the HGD45XW includes built-in WiFi connectivity and works with the free MyHarvia app. Start your steam session, adjust temperature, and monitor conditions from anywhere with an internet connection.

Q: What electrical supply do I need? A: The generator operates on either 230V single-phase (requiring a 25A dedicated circuit with 3 × 6 mm² cable) or 400V three-phase (requiring 3 × 10A fuses with 5 × 1.5 mm² cable). A qualified electrician must carry out all installation work.

Q: Do I need a water softener? A: In hard water areas (above 100 ppm calcium), a water softener is strongly recommended to prevent limescale buildup on the heating elements and extend the generator’s working life.

Q: What maintenance is required? A: Regular descaling is recommended based on usage frequency and water hardness. The sediment cup should be checked and emptied periodically. If fitted with the optional automatic discharge valve, the system will self-flush at programmed intervals.

Q: What is the warranty? A: Harvia provides a 2-year warranty for domestic/private use and a 1-year warranty for commercial applications. Contact Parts4Tubs for full warranty terms and conditions.

Q: Can I control lighting and ventilation through the steam generator? A: Yes, the Xenio WiFi control panel can manage external lighting (up to 100W) and ventilation fans (up to 100W) in addition to the steam generator functions.

📥 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 HGD45XW

• ✅ Finnish Engineering Excellence – Over 75 years of Harvia expertise in heat technology ensures superior performance and reliability
• ✅ Smart WiFi Connectivity – The MyHarvia app puts complete control in your pocket, letting you prepare your steam room from anywhere
• ✅ Titanium Elements – Industry-leading corrosion resistance means longer life, especially in hard water areas
• ✅ Modular Design – Replaceable components ensure economical maintenance and extended service life
• ✅ Comprehensive Control – Manage temperature, timing, lighting, ventilation, and aromatherapy from one elegant touchscreen
• ✅ Proven Durability – Stainless steel construction built for both domestic relaxation and light commercial demands

🤝 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 specialists
• ✅ Competitive pricing with price-match commitment
• ✅ Full manufacturer warranty support and after-sales service
• ✅ Easy returns within 30 days for complete peace of mind

✨ Summary

The Harvia HGD45XW 4.5kW WiFi steam generator delivers the authentic Finnish steam experience to rooms up to 7 m³. With smartphone control via the MyHarvia app, durable titanium heating elements, and an intuitive Xenio WiFi touchscreen, this generator transforms any compatible space into a personal wellness retreat. Backed by Harvia’s 75-year heritage, CE certification, and a 2-year domestic warranty—plus Parts4Tubs expert UK support—the HGD45XW is the smart choice for home steam rooms and light commercial installations. Order today for fast UK delivery.