♨️ Harvia HGX45XW 4.5kW WiFi Steam Generator – 2-7 m³ Capacity

Smartphone-controlled Finnish steam technology perfect for compact home steam rooms and shower enclosures

🧖 Product Overview

The Harvia HGX45XW brings authentic Finnish wellness into your home with smart WiFi connectivity and effortless touchscreen control. This compact 4.5kW steam generator is purpose-built for smaller residential steam rooms, shower enclosures, and intimate spa spaces up to 7 m³.

Developed by Harvia, the world’s leading sauna and spa manufacturer with over 70 years of expertise, the HGX45XW delivers soft, gentle steam at the touch of a button—or remotely via the MyHarvia smartphone app. The included Xenio WiFi touchscreen panel puts complete control at your fingertips, managing not just steam but also optional fragrance pumps, lighting, and ventilation.

Despite its compact 230 × 150 × 530 mm footprint, this generator packs serious performance with 5.5 kg/h steam output from its 4.0-litre steel water container. The innovative sediment collection cup captures water impurities before they reach the heating elements, ensuring reliable operation and simplified maintenance. Whether you’re converting a bathroom into a steam shower or creating a dedicated wellness space, the HGX45XW offers professional-grade performance in a home-friendly package.

✨ Key Features

✅ MyHarvia WiFi Connectivity – Start your steam session remotely and monitor temperature directly from your smartphone using the free MyHarvia app

✅ Xenio WiFi Touchscreen Panel – Stylish control unit manages steam, fragrance pump, lighting, and ventilation from one elegant interface

✅ 5.5 kg/h Steam Output – Consistent, enveloping steam production refined through decades of Finnish expertise

✅ Dual Voltage Flexibility – Operates on 230V single-phase (25A) or 400V three-phase supply for versatile installation options

✅ Compact Wall-Mount Design – Slim dimensions allow installation in tight utility spaces, cupboards, or above steam cabins

✅ 4.0 Litre Steel Water Container – Robust reservoir with integrated sediment cup protects heating elements and simplifies maintenance

✅ Adjustable Temperature – Set your preferred steam room temperature anywhere between 30°C and 55°C

✅ Programmable Timer – Session duration from 10 minutes up to 24 hours with delay start function up to 12 hours

✅ Manual Discharge Valve – Standard fitting for easy draining and descaling; optional automatic valve available

✅ Fragrance Pump Compatible – Connect optional Harvia aroma pump to infuse essential oils into your steam

✅ CE and EAC Certified – Fully tested and approved for European markets with IPX2 splash protection

✅ 2-Year Domestic Warranty – Comprehensive Harvia manufacturer warranty for residential installations

🔧 Technical Specifications

Specification	Value
Model	HGX45XW
GTIN	6417659031509
Power Output	4.5 kW
Steam Output	5.5 kg/h
Room Capacity	2–7 m³ (varies by wall type)
Voltage Options	230V 1N~ or 400V 3N~
Fuse (230V 1N~)	25 A
Fuses (400V 3N~)	3 × 10 A
Supply Cable (400V)	5 × 1.5 mm²
Dimensions (H × W × D)	230 × 150 × 530 mm
Net Weight	9.7 kg
Water Container Volume	4.0 litres
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 HGX45XW is designed for compact steam rooms between 2 and 7 m³. The exact capacity depends on your wall construction and whether the room has mechanical ventilation.

Room Volume by Wall Type

Wall Construction	Not Ventilated	Ventilated
Light wall (acrylic, glass, etc.)	2.0–7.0 m³	2.0–5.0 m³
Tiled light wall	2.0–6.0 m³	2.0–4.0 m³
Tiled stone wall	2.0–4.5 m³	2.0–3.5 m³

Understanding the Adjustments

• Light walls (acrylic panels, glass enclosures) retain heat well and allow maximum room coverage
• Tiled walls absorb more heat initially, reducing effective capacity slightly
• Stone walls (marble, granite, natural stone) absorb significant heat—size down accordingly
• Ventilated rooms lose heat continuously, requiring more steam output per cubic metre

Sizing Worked Example

📍 Example: Converting a 1.8m × 1.2m × 2.2m shower enclosure with glass panels

• Base volume: 1.8 × 1.2 × 2.2 = 4.75 m³
• Wall type: Light wall (glass/acrylic), not ventilated
• HGX45XW capacity: 2.0–7.0 m³
• Result: ✅ Ideal match – comfortably within range

📍 Example: Home steam room 2.0m × 1.5m × 2.3m with ceramic tiles

• Base volume: 2.0 × 1.5 × 2.3 = 6.9 m³
• Wall type: Tiled light wall, not ventilated
• HGX45XW capacity: 2.0–6.0 m³
• Result: ⚠️ At upper limit – consider HGX60XW for faster heat-up

💡 Tip: If your room falls near the upper capacity limit, selecting the next model up (HGX60XW at 6kW) will provide faster warm-up times and better temperature stability.

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💰 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	£55	£1.10
🏠 Regular Use	4	~100	£110	£1.10
🧖 Heavy Use	6	~150	£165	£1.10

Cost Calculation

Per 30-minute session at full power:
4.5 kW × 0.5 hours × £0.245 = £0.55

Per 60-minute session at full power:
4.5 kW × 1.0 hours × £0.245 = £1.10

⚠️ Actual costs vary based on session length, room insulation, ambient temperature, and your energy tariff. The generator cycles on and off to maintain temperature, so real-world consumption is typically lower than the rated power suggests.

Cost Comparison

At approximately £0.55–£1.10 per session, a home steam room costs similar to a premium coffee—far less than spa visits while being available whenever you want.

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⚡ Installation Requirements

Electrical Requirements

Requirement	230V Option	400V Option
Voltage	230V 1N~	400V 3N~
Fuse Rating	25 A	3 × 10 A
Supply Cable	See manual	5 × 1.5 mm²
Dedicated Circuit	Required	Required
RCD Protection	Required	Required

The HGX45XW offers flexibility with both single-phase and three-phase connection options, making it suitable for most UK residential electrical systems.

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	Ensure adequate airflow around unit
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. A dedicated circuit 
with RCD protection is mandatory.

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🚿 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 recommended

Drainage

Requirement	Specification
Drain connection	G½” female
Drain type	Gravity drain to floor waste
Manual discharge valve	Included as standard
Automatic drain valve	Optional accessory

Water Hardness Guidance

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

The integrated sediment cup collects mineral deposits and impurities before they reach heating elements. 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 damage from overheating
• ✅ 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 – Choose restart behaviour after power interruptions (ON1/ON2/OFF modes)
• ✅ Separate Water Level Measurement – Clean water measuring cup ensures accurate readings unaffected by impurities

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 HGX45XW 4.5kW is perfectly suited for:

Application	Typical Size	Capacity	Suitability
🚿 Steam Shower Enclosure	1.5–4 m³	1–2 people	⭐ Excellent
🏠 Compact Home Steam Room	3–6 m³	1–2 people	⭐ Excellent
🛁 Bathroom Conversion	2–5 m³	1–2 people	⭐ Excellent
🏡 Garden Room Steam Cabin	3–7 m³	1–2 people	✅ Good
💆 Small Private Spa	4–6 m³	2 people	✅ Good

Perfect For

• Homeowners wanting to add steam functionality to an existing shower
• Bathroom renovations incorporating a steam shower feature
• Compact dedicated steam rooms in new builds
• Garden wellness rooms and outbuildings
• Small private spa installations

Consider the Next Size Up (HGX60XW) If

• Your room exceeds 5 m³ with tiled walls
• You want faster warm-up times
• The room has mechanical ventilation
• Natural stone finishes are used

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⚙️ Control Options & Accessories

Included with HGX45XW

• ✅ Harvia HGX45XW 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

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 post-session flushing
Steam Nozzle	ZG-500	Additional/replacement outlet

Spare Parts

Part	Code	Quantity in Unit
Heating Element 1500W 230V	SPZG-330T	3
Power Switch and Cover	SPZSK-684	1

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🍃 Aromatherapy

Enhance your steam experience 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 Aromatherapy Choices:

• Eucalyptus – Respiratory clarity and invigoration
• Lavender – Deep relaxation and stress relief
• Peppermint – Cooling sensation and mental clarity
• Citrus blends – Energising and mood-lifting

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💬 Frequently Asked Questions

Q: What size steam room is the HGX45XW suitable for? A: The HGX45XW suits rooms from 2 to 7 m³, depending on wall construction. With glass or acrylic panels and no ventilation, it covers up to 7 m³. With tiled stone walls, maximum capacity reduces to around 4.5 m³. Refer to the room sizing tables for your specific situation.

Q: Can I control it from my phone? A: Yes, the HGX45XW includes WiFi connectivity and works with the free MyHarvia app (iOS and Android). You can start sessions remotely, monitor temperature, and receive notifications.

Q: What electrical supply do I need? A: The HGX45XW offers two options: 230V single-phase with a 25A fuse, or 400V three-phase with 3 × 10A fuses. Most UK homes can accommodate the 230V option with a dedicated circuit. A qualified electrician must carry out the installation.

Q: How quickly does it heat up? A: Warm-up time depends on room size, insulation, and ambient temperature. Smaller, well-insulated rooms typically reach bathing temperature within 10–20 minutes. Use the delay start feature to have your steam room ready when you want it.

Q: Do I need a water softener? A: In hard water areas (above 200 ppm), a water softener is strongly recommended. Hard water causes limescale buildup that reduces efficiency and shortens element life. The sediment cup helps, but prevention is better than cure.

Q: What’s included in the box? A: The HGX45XW comes with the steam generator unit, Xenio WiFi control panel, temperature sensor (5m cable), steam nozzle, manual discharge valve, and sediment cup. Copper steam pipe (15mm internal diameter) must be sourced separately.

Q: What warranty is provided? A: Harvia provides a 2-year warranty for domestic/family use and 1-year warranty for commercial installations. Warranty requires proper installation and adherence to maintenance schedules as detailed in the manual.

Q: How often does it need maintenance? A: A service indicator illuminates after 200 hours of use. Regular maintenance includes emptying the sediment cup, checking water connections, and descaling based on water hardness. The removable front panel provides easy access for servicing.

Q: Can I add aromatherapy? A: Yes, the HGX45XW is compatible with optional Harvia fragrance pumps (HWF01XL or HWF01M). Once connected, you control aroma intensity through the Xenio panel.

📄 Downloads & Resources

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

⭐ Why Choose the Harvia HGX45XW

• ✅ Perfect Entry Point – Ideal power rating for home steam showers and compact rooms
• ✅ Finnish Engineering – 70+ years of Harvia expertise in every unit
• ✅ Smart Control – WiFi and app connectivity for modern convenience
• ✅ Dual Voltage – 230V or 400V options suit most UK installations
• ✅ Compact Dimensions – Fits utility cupboards and tight spaces
• ✅ Low Running Costs – Approximately £0.55–£1.10 per session
• ✅ Quality Construction – Steel housing built for years of reliable service
• ✅ Easy Maintenance – Sediment cup and removable panels simplify upkeep
• ✅ Certified Safe – CE/EAC approved with comprehensive safety features
• ✅ Backed by Warranty – 2-year manufacturer coverage for peace of mind

🛒 Why Buy from Parts4Tubs

• ✅ UK-based company with local customer support
• ✅ Fast UK delivery on in-stock items
• ✅ Expert advice from steam room specialists
• ✅ Competitive pricing on Harvia products
• ✅ Full manufacturer warranty support
• ✅ Easy returns within 30 days
• ✅ Technical guidance for sizing and installation

💨 Summary

The Harvia HGX45XW 4.5kW WiFi Steam Generator is the ideal choice for homeowners seeking authentic Finnish steam room technology in a compact, connected package. Covering rooms from 2–7 m³ with 5.5 kg/h steam output, it’s perfectly sized for steam showers, bathroom conversions, and intimate home spa spaces. The MyHarvia app and Xenio WiFi touchscreen deliver modern smart control, while robust steel construction and CE/EAC certification ensure safe, reliable operation. With flexible 230V or 400V installation options, a 2-year domestic warranty, and running costs from just £0.55 per session, the HGX45XW makes premium home wellness accessible. Order from Parts4Tubs today for fast UK delivery and expert support.