Heater database · Narvi
Narvi Aito AK-57K
Narvi Aito AK-57K is a heat-storing wood stove rated for sauna rooms of 388–812 ft³ (11–23 m³). Heat-storing: heat once, löyly for hours (130 kg ceramic or 220 kg olivine stones).
StoringHeat-storing wood stove
388–812 ft³rated room · 11–23 m³
287 lbstones · 130 kg
–nominal output
Rooms it fits
Indoor rooms with insulated walls, a 7 ft ceiling and a glass door, which counts extra. Wood stoves are rated by room volume, not by kW. For your own room, glass, masonry or log walls, use the calculator.
| Room | Counts as | Fit |
|---|---|---|
| 4 × 5 ft | 199 ft³ | Too big for this room |
| 5 × 5 ft | 234 ft³ | Too big for this room |
| 5 × 6 ft | 269 ft³ | Too big for this room |
| 6 × 6 ft | 311 ft³ | Too big for this room |
| 6 × 7 ft | 353 ft³ | Too big for this room |
| 7 × 8 ft | 451 ft³ | ✓ Rated for this room |
| 8 × 8 ft | 507 ft³ | ✓ Rated for this room |
| 8 × 10 ft | 619 ft³ | ✓ Rated for this room |
Similar stoves from other brands
- Kastor Karhu 20282–702 ft³
- IKI Original494–1059 ft³
- Kastor Karhu 22424–777 ft³
- Kastor Saga 22423–777 ft³
Source
Rated room range and stone load from Narvi's product information, checked October 2026. Ranges are the manufacturer's calculated room volumes; check the manual for safety distances, and have a licensed electrician make the connection.