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Description
The Harvia Xenio CX45-U1-U3-XW is a WiFi sauna control unit with a touch control panel for larger Harvia electric heaters that do not have built-in controls. It handles heaters up to 17 kW on 240V single-phase or up to 15 kW on 208V 3-phase, plus sauna lighting and fan. The compact panel can be mounted inside or outside the sauna room.
Specifications (Harvia)
- Model / part number: Harvia Xenio CX45, CX45-U1-U3-XW
- Maximum heater load: 17 kW at 240V 1-phase, or 15 kW at 208V 3-phase
- Compatible heaters (per Harvia): Harvia Cilindro, Virta (including Virta Pro), Club and Spirit E series heaters without built-in controls
- Temperature range: 104 to 194 °F (40 to 90 °C)
- Operating time: Family sauna 1 to 6 h, commercial sauna 1 to 12 h
- Timer delay: 0 to 12 h
- Functions: Heater, lighting and fan control
- Connectivity: WiFi for remote control and monitoring
- Control panel size: 3.35 in W x 4.33 in H x 0.94 in D
- Net weight: 8.2 lb
- Certification: ETL
What you need to know before buying
- Works with Harvia heaters that need a separate control, such as Cilindro, Virta, Virta Pro, Club and Spirit E models (per Harvia). The heater is sold separately.
- This is a hardwired 240V or 208V control: a licensed electrician is required.
- Choose the CX45 for heaters above the CX30's limits (11 kW at 240V, 10.5 kW at 208V 3-phase).
Warranty
2-year Harvia manufacturer warranty for residential use, plus 1 additional year when registered with Harvia within 30 days of purchase.
Returns
Returns accepted within 30 days of delivery for unused, uninstalled items in original sealed packaging. Return shipping is paid by the buyer, and a restocking fee of up to 15% may apply (up to 50% if packaging is missing or the seal is broken). Installed items are handled as manufacturer warranty claims.
Related
Harvia, Electric sauna heaters, Sauna breaker size calculator
Follow the manufacturer's installation clearances and electrical requirements. Sauna use is not recommended without medical advice if you are pregnant or have a heart condition or low blood pressure.
Specifications
| Model / part number | Harvia Xenio CX45, CX45-U1-U3-XW |
|---|---|
| Maximum heater load | 17 kW at 240V 1-phase, or 15 kW at 208V 3-phase |
| Compatible heaters (per Harvia) | Harvia Cilindro, Virta (including Virta Pro), Club and Spirit E series heaters without built-in controls |
| Temperature range | 104 to 194 °F (40 to 90 °C) |
| Operating time | Family sauna 1 to 6 h, commercial sauna 1 to 12 h |
| Timer delay | 0 to 12 h |
| Functions | Heater, lighting and fan control |
| Connectivity | WiFi for remote control and monitoring |
| Control panel size | 3.35 in W x 4.33 in H x 0.94 in D |
| Net weight | 8.2 lb |
| Certification | ETL |
Specifications from the manufacturer. Dimensions are approximate.
Shipping
We ship to the 48 contiguous U.S. states and Washington, DC. Your shipping cost is calculated at checkout and shown before you pay.
You will get an order confirmation right away and tracking by email when your order ships. Questions about timing for a specific item? Call (945) 280-3243 or email support@restoresuite.com before you order.
Delivery
Large items such as saunas, hot tubs and cold plunge tubs usually ship by freight. The carrier contacts you to schedule delivery. Please check the packaging and note any damage on the delivery receipt before you sign, then tell us within 48 hours so we can resolve it for you.
Before delivery day, measure doorways and hallways along the path to the install spot, and confirm the electrical requirement on the Specifications tab.
Warranty
2-year Harvia manufacturer warranty for residential use, plus 1 additional year when registered with Harvia within 30 days of purchase.
If this item has a manufacturing defect within 30 days of purchase, contact us with your order number and a photo or video of the issue and we will make it right.
Reviews
What delivery looks like


Why this heater
WiFi touch control for Harvia heaters up to 17 kW at 240V 1-phase or 15 kW at 208V 3-phase
- For Harvia Cilindro, Virta, Club and Spirit E heaters
- Up to 17 kW at 240V or 15 kW at 208V 3-phase
- WiFi for remote control and monitoring
- Controls temperature, timer, lighting and fan

Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
- Temperature range
- 104 to 194 °F (40 to 90 °C)
- Control panel size
- 3.35 in W x 4.33 in H x 0.94 in D
- Net weight
- 8.2 lb
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- Sized for larger heaters than the Xenio CX30.
- Works on both 240V single-phase and 208V 3-phase service.
Not sure this is the right fit? Ask us or call (945) 280-3243.
Compare Harvia models
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Harvia Xenio Combi CX30C WiFi Sauna Control
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Harvia Xenio CX45 WiFi Sauna Heater Control
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Common questions
Which heaters does the Xenio CX45 work with?
CX30 or CX45?
Does it need an electrician?
What else do I need?
Choosing the right setup can be tricky. We are here to help.
Tell us your space, power and how you plan to use it, and we will help you compare models honestly, including whether this one is the right fit.
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