Harvia Spirit Sauna Heater (Smart Control)

Harvia Spirit Electric Sauna Heater The Harvia Spirit Electric Sauna Heater is Harvia's most popular U.S. residential wall-mounted electric sauna heater, a sleek stainless steel column topped with a bed of rounded sauna stones that gives Spirit its signature visual identity. Available in 6 kW, 8 kW, or 9 kW at 240V 1-Phase. The W-suffix Spirit body pairs with an external Harvia Smart Control power unit (CX30 for 6 kW; CX45 for 8 / 9 kW) for digital scheduling, WiFi/MyHarvia app control, and remote start. Optional Fenix Upgrade adds Harvia's next-generation touchscreen display on top of the Xenio CX. Pick the Right kW for Your Cabin Each Spirit size is rated for a specific sauna cabin interior volume. Calculate your cabin volume as interior length × width × height. If the cabin includes a glass door or window, add roughly 25% to the calculated cubic footage to compensate for radiant heat loss. Model Best For Cabin Volume Amperage Xenio Control Spirit 6 kW Standard residential 2–4 person sauna cabins 177–294 cu ft 25 Amps Xenio CX30 Spirit 8 kW Large residential / family-size sauna cabins (4–5 person bench) 250–425 cu ft 33 Amps Xenio CX45 Spirit 9 kW The largest residential sauna cabins (5–6 person bench), typically destination wellness spaces or commercial-light spaces 320–530 cu ft 37.5 Amps Xenio CX45 Key Features Sleek stainless steel wall-mounted column, Harvia's most popular U.S. residential sauna heater. Signature rounded stone bed on top of the heater, uses Harvia R-991 olivine diabase rounded stones (4 boxes included in Tier 2+). Available in three kilowatt sizes (6 / 8 / 9 kW) for cabin volumes from 177 to 530 cubic feet. Pairs with the Harvia Smart Control: CX30 (30A) for the 6 kW model, CX45 (45A) for the 8 / 9 kW models. WiFi-enabled, MyHarvia app compatible. Optional Fenix Upgrade (Tier 3) adds the Harvia Fenix FX004XW touchscreen display on top of the Xenio CX, futureproofs the install on Harvia's next-generation control platform. Compact heater dimensions of 14"D x 16.5"W x 22"H. UL Listed, meets U.S. safety standards for residential sauna heater installation. Backed by Harvia's 2-year residential limited warranty. What's Included Each kW size is offered in four package tiers. Pick the size from the selector above, then pick the package tier on the product page. Package Includes Spirit Just Heater Harvia Spirit heater body in the selected kW size (240V 1-Phase) Heater only, Xenio CX control unit sold separately Spirit Heater + Control + Stones Harvia Spirit heater body in the selected kW size (240V 1-Phase) Harvia Smart Control power unit (CX30 for 6 kW, CX45 for 8 / 9 kW), WiFi-enabled, MyHarvia app compatible 4 × Harvia R-991 Rounded Sauna Stones, olivine diabase, 5–10 cm rounded, 15 kg (33 lb) per box Spirit Heater + Control + Stones + Fenix Upgrade Everything in the "Heater + Control + Stones" package above Harvia Fenix FX004XW Touchscreen Display Add-On, modern UI overlay for the Xenio CX Ultimate Package: Heater + Control + Stones + All Accessories Everything in the "Heater + Control + Stones" package above Harvia Spirit Safety Rail (HSP3M), factory-matched protective railing, fits all Spirit sizes (6 / 8 / 9 kW) Xenio CX + Fenix Upgrade, What's the Difference? Tier 2 ("Spirit Heater + Control + Stones") bundles the Harvia Xenio CX30 or CX45 power unit (auto-matched to the heater's amperage: CX30 for 6 kW, CX45 for 8/9 kW). The Xenio CX is Harvia's long-running, field-proven digital control platform, ships with WiFi built in and connects to the MyHarvia smartphone app for remote start and scheduling. Tier 3 ("Spirit Heater + Control + Stones + Fenix Upgrade") adds the Harvia Fenix FX004XW Touchscreen Display on top of the Xenio CX. The Fenix touchscreen is the platform Harvia is investing in going forward; pairing it with the CX power unit today means you have a familiar, current-production switching base AND a modern, future-proof touchscreen interface in the sauna. Sauna Stones, Why Rounded Spirit's signature visual is the bed of rounded sauna stones piled across the top of the heater. Unlike the angular split stones used in most Harvia models, Spirit uses Harvia's R-991 rounded olivine diabase, 5–10 cm river-rock-style stones in 15 kg (33 lb) boxes. The rounded shape produces a softer visual profile and slightly more uniform heat distribution across the stone bed surface. Every "Spirit Heater + Control + Stones" tier (and the Fenix Upgrade tier) ships with 4 × R-991 boxes, the correct quantity to fill the Spirit stone bed for any of the 6, 8, or 9 kW models. If you'd rather source rounded stones locally, pick the "Spirit Just Heater" tier; R-991 boxes are sold separately. Installation & Electrical Requirements Every Spirit requires a dedicated 240V 1-Phase circuit wired by a licensed electrician. Required amperage and wire gauge varies by kW, see the sizing table above. Spirit is UL Listed and must be installed per the included manual, local electrical code, and any applicable AHJ (authority having jurisdiction) inspection. Installation Manual Click Here to Download the Harvia Spirit Installation Manual About the Harvia Spirit Family Spirit is Harvia's most popular U.S. residential electric sauna heater, a sleek wall-mounted stainless steel column that sits between the compact Vega and the larger Cilindro/Virta lines. Its signature visual is the bed of rounded sauna stones piled across the top of the heater body, giving Spirit a softer, more organic stone profile compared to the angular stone beds of other Harvia models. The rounded R-991 stones also distribute heat more evenly across the bed surface, producing the clean, even löyly Spirit is known for. Spirit pairs with the external Harvia Smart Control power unit (CX30 for the 6 kW model, CX45 for the 8 / 9 kW models) for full digital scheduling, WiFi/MyHarvia app control, and remote start. The optional Fenix Upgrade adds the next-generation Fenix FX004XW touchscreen display on top of the Xenio CX power unit, same heater, same Xenio CX wiring, but with Harvia's modern touchscreen UI in the sauna for the longest-runway platform investment. 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. Our team works with you from heater sizing through installation. Free shipping on all Harvia heaters; white-glove install coordination available nationwide. Warranty & Support Harvia Spirit 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. Videos