Narvi
Narvi Aitokiuas wood-burning sauna stove
Narvi makes the Aitokiuas wood stove in 9 versions for saunas of 283 ft³ to 3,178 ft³. Slide to your room size to see which one fits and how fast it heats.
Updated Oct 18, 2026
Output
not published
Rooms
283 ft³–3,178 ft³
Stones
132 lb–1,433 lb
Sizes
9
Which size fits your sauna?
Your room's effective volume
636 ft³
Best fit: AK-57K
Work out your effective volumeEffective volume = inside volume, plus 1.2 m³ for every m² of glass, tile or stone; × 1.5 for solid log walls (Harvia's rule, used by most planners).
Sizes and specifications
| Model | Output | Room range | Stones | Heat-up | Firewood per session |
|---|---|---|---|---|---|
| AK-4710026, 20323 | – | 283 ft³–424 ft³ | 198 lb | 55–70 min | 10 lb |
| AK-47 Through-wallThrough-wall | – | 283 ft³–424 ft³ | 132 lb | 40–55 min | 9 lb |
| AK-5710023, 17054 | – | 318 ft³–706 ft³ | 209 lb | 35–45 min | 12 lb |
| AK-57 Through-wallThrough-wall | – | 318 ft³–706 ft³ | 198 lb | 30–45 min | 12 lb |
| AK-57K17056 | – | 388 ft³–883 ft³ | 298 lb | 35–45 min | 15 lb |
| AK-6817063 | – | 494 ft³–918 ft³ | 441 lb | 40–55 min | 18 lb |
| AK-7812348 | – | 671 ft³–1,059 ft³ | 529 lb | 45–60 min | 22 lb |
| AK-9512349, 20472 | – | 848 ft³–1,201 ft³ | 1,213 lb | 75–100 min | 35 lb |
| AK-11012350, 20482 | – | 1,095 ft³–3,178 ft³ | 1,433 lb | 35–45 min | 48 lb |
Heat-up and cost are our heat model's estimate for each size in a room at the middle of its range: indoor, insulated walls, 68 °F around the sauna, heated to 176 °F, one hour of bathing, electricity at $0.18/kWh (United States average). The maker does not publish this stove's output; the heat-up times use a rough figure from its room range.
Where to see it
- AK-47€2,386 at esaunashop.com (2026-10-18)
- AK-47€3,201 at esaunashop.com (2026-10-18)
- AK-57€4,002 at esaunashop.com (2026-10-18)
- AK-57€4,567 at esaunashop.com (2026-10-18)
- AK-57K€4,730 at esaunashop.com (2026-10-18)
- AK-68€8,628 at esaunashop.com (2026-10-18)
- AK-78€9,952 at esaunashop.com (2026-10-18)
- AK-95€11,999 at esaunashop.com (2026-10-18)
Prices and availability come from the shop or maker and change; their page is what counts. Shop offers are added as retailers join.
Sources
- esaunashop.com/aito-ak-47-with-ceramic-stonesdealer · read 2026-10-18
- esaunashop.com/aito-ak-47-with-traditional-stonesdealer · read 2026-10-18
- narvi.fi/en/product/aitokiuas-47-57-through-wall/maker · read 2026-10-18
- esaunashop.com/aito-ak-57-stdealer · read 2026-10-18
- esaunashop.com/aito-ak-57-with-ceramic-stonesdealer · read 2026-10-18
- esaunashop.com/aito-ak-57k-4527dealer · read 2026-10-18
- esaunashop.com/aito-ak-68-with-ceramic-stonesdealer · read 2026-10-18
- esaunashop.com/aito-ak-78-with-ceramic-stonesdealer · read 2026-10-18
- esaunashop.com/aito-ak-95-with-ceramic-stonesdealer · read 2026-10-18
- esaunashop.com/aito-ak-95-with-traditional-stonesdealer · read 2026-10-18
Other heaters for the same rooms
Questions and answers
What size sauna does the Narvi Aitokiuas heat?
Narvi rates the sizes for these rooms: AK-47 283 ft³–424 ft³; AK-47 Through-wall 283 ft³–424 ft³; AK-57 318 ft³–706 ft³; AK-57 Through-wall 318 ft³–706 ft³; AK-57K 388 ft³–883 ft³; AK-68 494 ft³–918 ft³; AK-78 671 ft³–1,059 ft³; AK-95 848 ft³–1,201 ft³; AK-110 1,095 ft³–3,178 ft³. Use your room's effective volume: add 1.2 m³ for every m² of glass, tile or stone, and multiply by 1.5 for solid log walls.
How long does the Narvi Aitokiuas take to heat up?
In a well-insulated room at the middle of each size's range, our heat model gives about: AK-47 55–70 min; AK-47 Through-wall 40–55 min; AK-57 35–45 min; AK-57 Through-wall 30–45 min; AK-57K 35–45 min; AK-68 40–55 min to reach 176 °F. The maker does not publish the output, so treat these as rough; firing and wood make a big difference.
How many stones does the Narvi Aitokiuas take?
As stated by Narvi: AK-47 198 lb; AK-47 Through-wall 132 lb; AK-57 209 lb; AK-57 Through-wall 198 lb; AK-57K 298 lb; AK-68 441 lb; AK-78 529 lb; AK-95 1,213 lb; AK-110 1,433 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.