Harvia Virta HL11 10.5KW Sauna Heater (177-635CF)
Harvia Virta HL11 10.5KW Sauna Heater (177-635CF)
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Harvia Virta 10.5 kW Electric Sauna Heater
The Harvia Virta 10.5 kW Electric Sauna Heater (HL11U1) is the 10.5-kilowatt variant of Harvia's classic rectangular sauna heater, brushed stainless steel housing, vertical stone bed, top-loaded. Pairs with the external Xenio CX45 Xenio Smart Control power unit (bundled in Tier 2 and Tier 3) for digital scheduling, WiFi/MyHarvia control, and remote start. Designed for the largest residential sauna cabins (5–6 person bench) and light-commercial installations from 177 to 635 cubic feet; available in 240V 1-Phase or 208V 3-Phase service.
Key Features
- Capable of heating sauna rooms from 177 to 635 cubic feet.
- Powerful 10.5 kW and 43.75 Amps on a 240V 1-Phase or 208V 3-Phase circuit.
- Requires 6 Gauge Copper for installation.
- Pairs with the Harvia Xenio CX45 Smart Control (Tier 2+), WiFi-enabled, MyHarvia app compatible.
- Brushed stainless steel housing with vertical stone bed across the front; top-loaded.
- Requires 4 × boxes of AC3020 sauna stones (10–15 cm olivine diabase, 20 kg / 44 lb per box). Bundled in Tier 2+.
- Optional Fenix touchscreen display (FX004XW) at Tier 3.
- UL Listed.
Technical Specifications
| Specification | Detail |
|---|---|
| Room Volume | 177 to 635 cubic feet |
| Dimensions | 14.5" W × 12.5" D × 24.5" H |
| Power | 10.5 kW, 43.75 Amps |
| Voltage Options | 240V 1-Phase or 208V 3-Phase, 60 Hz |
| Wire Size | 6 Gauge Copper |
| Mounting | Floor- or wall-stand mounted (external Xenio CX control) |
| Control | Harvia Xenio CX45 (Tier 2+); optional Fenix FX004XW touchscreen upgrade (Tier 3) |
| Sauna Rocks | 4 × AC3020 (10–15 cm, 20 kg / 44 lb per box), included with Tier 2+ |
| Certification | UL Listed |
| Harvia Model Code | HL11U1 |
Why the 10.5 kW Size
The Virta 10.5 kW is rated for sauna cabins between 388 and 636 cubic feet, best for the largest residential sauna cabins (5–6 person bench) and light-commercial installations. For smaller cabins step down to the Virta 8 or 9 kW. For commercial-grade output above 10.5 kW, see the Harvia Virta Pro 16 kW or 20 kW sibling line.
Xenio CX + Fenix Upgrade, What's the Difference?
Tier 2 ("Virta Heater + Control + Stones") bundles the Harvia Xenio CX Smart Control power unit (auto-matched to kW: CX30 for the 6 kW Virta, CX45 for the 8 / 9 / 10.5 kW Virta). The Xenio CX ships with WiFi built in and connects to the MyHarvia smartphone app for remote start and scheduling.
Tier 3 ("Virta Heater + Control + Stones + Fenix Upgrade") adds the Harvia Fenix FX004XW Touchscreen Display on top of the Xenio CX, Harvia's next-generation control UI, for the longest-runway platform investment as Harvia eventually transitions from the Xenio control panel to the Fenix touchscreen across the product line.
Sauna Stones
Every "Heater + Control + Stones" package (and the Fenix Upgrade tier) ships with the correct quantity of Harvia AC3020 sauna stones, olivine diabase, 10–15 cm size grade, 20 kg (44 lb) per box. The larger 10–15 cm grade is preferred for Virta because the heater's tall vertical stone bed packs more efficiently with bigger stones, and the larger thermal mass holds heat longer through repeated water throws. Stone quantity by kW: 3 boxes (6 / 8 / 9 kW), 4 boxes (10.5 kW).
Installation & Electrical Requirements
The Virta 10.5 kW requires a dedicated 240V 1-Phase or 208V 3-Phase circuit (43.75 Amps, 6 Gauge Copper) wired by a licensed electrician. Virta is UL Listed and must be installed per the included manual.
Installation Manual
Click Here to Download the Harvia Virta Installation Manual
In the Box
- 1 × Harvia HL11U1 Virta Electric Sauna Heater body
- Installation and Operation Manual
- Warranty Information
About the Harvia Virta Family
Harvia Virta is the company's classic rectangular electric sauna heater, brushed stainless steel housing, vertical stone bed across the front, top-loaded, designed to mount on either the floor or a heater-rated stand along the cabin wall. The Virta delivers Harvia's signature soft, even löyly across a wide range of cabin volumes from 200 cu ft up to roughly 650 cu ft on the 10.5 kW residential variant.
Every Virta requires an external Harvia Xenio Smart Control power unit (CX30 for 6 kW; CX45 for 8 / 9 / 10.5 kW), the controller ships separately and mounts outside the sauna cabin. The optional Fenix Upgrade swaps the Xenio's standard control panel for Harvia's next-generation FX004XW touchscreen.
For commercial-grade output beyond 10.5 kW, see the Virta Pro 16 kW (HL16U1) and 20 kW (HL20U3) sibling line, sold separately.
Why Buy From Finnish Sauna Builders
As an authorized Harvia dealer, Finnish Sauna Builders sources every heater direct from Harvia US (Lewisburg, WV) with full factory warranty and dealer technical support. Free shipping on all Harvia heaters; white-glove install coordination available nationwide.
Warranty & Support
Harvia Virta carries Harvia's standard 2-year residential limited warranty. Finnish Sauna Builders handles all warranty claims direct, no third-party return desk.
About Harvia
Harvia has been building world-class sauna heaters in Finland since 1950. Every Harvia product carries forward more than 70 years of Finnish craftsmanship, materials science, and a relentless focus on the perfect löyly, the heated, humid burst of steam released when water meets hot sauna stones.