- 50 kW output heats 1,589–2,472 ft³ rooms (45–70 m³)
- Holds 220 lb of 4–6″ stones for long‑lasting steam
- 606 lb stove mass, 10–15 mm steel walls for decades of service
- Oversize glass door & cool‑touch wooden handle
- Made and safety‑listed in Finland (CE, EN 15821)
- 2‑year Narvi warranty
- Free continental US freight delivery
- US-Based Tech Support
Why Narvi 50 Stands Alone
Largest Capacity in the USA – No other UL‑listed or CE‑listed wood stove sold stateside pushes a full 50 kW. That headroom lets you heat big commercial saunas without running the stove at its limit, extending lifespan and giving bathers consistent, soft steam.
Finnish Craft, American Support – Narvi has forged sauna heaters since 1937 and runs its own foundry for absolute control over alloys and welds. Sauna Marketplace backs every Narvi 50 with US‑based technical help, spare‑part stocking, and white‑glove freight coordination.
Stone‑Driven Löyly – With 220 pounds of dolerite, heat is stored inside the rock mass instead of blasting the room with flame. A single splash of water delivers a luxurious cloud that lingers.
Built for Abuse – 10‑15 mm thick furnace plate (triple the industry norm) resists warping; replaceable grates and adjustable hinges keep the stove field‑serviceable for decades.
Flexible Installation – Rear or top 5.7" (145 mm) flue, tunnel‑through‑the‑wall option, and field‑swappable fire‑door swing simplify new builds and retrofits.
Ideal For
- Commercial spas & wellness resorts
- Hunting/fishing lodges and short‑term rentals serving 8‑20 guests
- Large private saunas built from logs, masonry, or high‑glass designs where extra kW offsets heat loss
- Off‑grid properties wanting maximum heat per firebox load
| Spec | U.S. Measure |
|---|---|
| Recommended Room Volume | 1,589 – 2,472 ft³ |
| Nominal Output | 50 kW (≈ 171,000 BTU/h) |
| Stone Capacity | 220 lb of 4 – 6 in igneous stones |
| Stove Weight (empty / with stones) | 606 lb / 826 lb |
| Firewood Length (max) | 13 in (fits standard 12–14 in logs) |
| Typical Firewood Use | ~ 19 lb hardwood for a 2‑hr session |
| Flue Diameter | 5.7 in (fits any 6 in Class‑A chimney) |
| Draft Requirement | 0.05 in H₂O (≈ 12 Pa) minimum |
| Overall Dimensions (W × D × H) | 26.4 in × 33.5 in × 43.3 in |
| Clearances to Combustibles* | Front 40 in • Sides 20 in • Back 20 in • Ceiling 49 in |
| Efficiency / CO @ 13 % O₂ | 70 % / 0.30 % |
| Compliance | CE & EN 15821‑2010 (meets U.S. code via Class‑A chimney) |
*Clearances may be cut in half with an approved heat shield.
Operating Costs & Firewood Tips
Expect ~ 19 lb of split, <20 %‑moisture hardwood for a typical two‑hour service. Load 8 lb to start; add 5 lb once the first bed embers. Maintain heat with 1–2 logs every 30 minutes thereafter. Keep draft calm; roaring flames waste energy and overheat the flue.
Installation & Safety
Floor Load: 1,000 lb+ with stones; verify joist capacity or pour a slab.
Ventilation: Provide at least one 4" fresh‑air inlet within 12" of the stove.
Heat Shields: Stainless or fiber‑cement, 1" standoff, if framing is combustible.
Chimney: Class A insulated rated 600 °C (1,112 °F). Double‑wall black adaptor recommended in‑room.
Inspection: Have a certified professional check draft and clearances before first firing.
Shipping & Lead Time
Narvi 50 ships free to the lower 48 on a lift‑gate pallet. Average lead time: 5–7 business days in‑stock or 4–6 weeks direct from Finland during peak season. You’ll receive tracking plus a call to schedule delivery.
Warranty & Support
Narvi Oy’s 2‑year parts warranty covers manufacturing defects; stones and gaskets are consumables. Sauna Marketplace serves as your US‑based liaison for troubleshooting, replacement parts, and wear‑item reorders.
Compare Narvi 50 vs. Narvi 30
| Narvi 30 | Narvi 50 | |
|---|---|---|
| Output | 24 kW | 50 kW |
| Room Size | 706–1,236 ft³ | 1,589–2,472 ft³ |
| Stone Capacity | 143 lb | 220 lb |
| Stove Mass | 331 lb | 606 lb |
| Footprint (W × D) | 21 × 26 " | 26 × 34 " |
| Best For | Family Sauna | Lodges, commercial spas |
If your room volume is under 1,250 ft³, the Narvi 30 gives identical build quality with a smaller footprint and fuel bill.
Ready to Transform Your Large Sauna?
Click Add to Cart or call Sauna Marketplace for a quick sizing check with a US sauna specialist. Bring authentic Finnish heat to every corner of your big room—reliably, quietly, beautifully—with the Narvi 50.
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