Heater database · Tulikivi
Tulikivi Usva M 68
Tulikivi Usva M 68 is a 6.8 kW electric heater rated for sauna rooms of 177–318 ft³ (5–9 m³). Finnish soapstone casing.
6.8 kW28.3 A at 240 V · 9.8 A per phase at 400 V
177–318 ft³rated room · 5–9 m³
66 lbstones · 30 kg
40 Atypical 240 V breaker (125% rule); check the manual
Rooms it fits
Indoor rooms with insulated walls, a 7 ft ceiling and a glass door, which counts extra. Warm-up is from 68 °F to 176 °F, estimated with the calculator's model. For your own room, glass, masonry or log walls, use the calculator.
| Room | Counts as | Fit | Warm-up |
|---|---|---|---|
| 4 × 5 ft | 199 ft³ | ✓ Rated for this room | 39 min |
| 5 × 5 ft | 234 ft³ | ✓ Rated for this room | 44 min |
| 5 × 6 ft | 269 ft³ | ✓ Rated for this room | 50 min |
| 6 × 6 ft | 311 ft³ | ✓ Rated for this room | 56 min |
| 6 × 7 ft | 353 ft³ | Too small for this room | – |
| 7 × 8 ft | 451 ft³ | Too small for this room | – |
| 8 × 8 ft | 507 ft³ | Too small for this room | – |
| 8 × 10 ft | 619 ft³ | Too small for this room | – |
Similar heaters from other brands
- Helo Himalaya 706.8 kW · 177–318 ft³
- Saunum Air 76.9 kW · 177–318 ft³
- HUUM Drop 66 kW · 177–318 ft³
- HUUM Hive Mini 66 kW · 177–318 ft³
Source
Rated room range and stone load from Tulikivi'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.