HUUM
HUUM Hive sauna heater
HUUM makes the Hive in 6 sizes, from 6 to 18 kW, for saunas of 177 ft³ to 989 ft³. Slide to your room size to see which one fits, how fast it heats and what it needs from your fuse box.
Updated Oct 17, 2026
Output
6–18 kW
Rooms
177 ft³–989 ft³
Stones
331 lb–551 lb
Sizes
6
Which size fits your sauna?
Your room's effective volume
459 ft³
Best fit: Mini 11
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 | Per session |
|---|---|---|---|---|---|
| HIVE Mini 6 | 6 kW | 177 ft³–318 ft³ | 331 lb | 85–115 min | $1.88 |
| HIVE Mini 9 | 9 kW | 283 ft³–459 ft³ | 331 lb | 60–80 min | $2.22 |
| HIVE Mini 11 | 10.6 kW | 353 ft³–565 ft³ | 331 lb | 55–75 min | $2.39 |
| HIVE 12 | 12 kW | 424 ft³–636 ft³ | 551 lb | 70–100 min | $3.27 |
| HIVE 15 | 15 kW | 530 ft³–812 ft³ | 551 lb | 60–80 min | $3.70 |
| HIVE 18 | 18 kW | 636 ft³–989 ft³ | 551 lb | 55–70 min | $4.05 |
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).
Electrical connection
| Model | Supply | Current | Fuse / breaker | Cable |
|---|---|---|---|---|
| HIVE Mini 6 | 1~ 240 V | 25 A | 30 A | 10 AWG |
| HIVE Mini 9 | 1~ 240 V | 37.5 A | 50 A | 8 AWG |
| HIVE Mini 11 | 1~ 240 V | 44.2 A | 50 A | 6 AWG |
| HIVE 12 | 1~ 240 V | 50 A | 2 × 30 A | 10+10 AWG |
| HIVE 15 | 1~ 240 V | 62.5 A | 2 × 50 A | 6+6 AWG |
| HIVE 18 | 1~ 240 V | 75 A | 2 × 50 A | 6+6 AWG |
Current is computed from the output; fuse and cable are shown where the maker or dealer states them. A licensed electrician sizes and installs the circuit following the heater's manual and local rules.
Where to see it
Prices and availability come from the shop or maker and change; their page is what counts. Shop offers are added as retailers join.
Sources
- huum.eu/product/hive-mini-electric-sauna-heater/maker · read 2026-10-17
- huumsauna.com/product/hive-mini-electric-sauna-heater/maker · read 2026-10-17
- huum.eu/product/hive-electric-sauna-heater/maker · read 2026-10-17
- huumsauna.com/product/hive-electric-sauna-heater/maker · read 2026-10-17
Other heaters for the same rooms
Questions and answers
What size sauna does the HUUM Hive heat?
HUUM rates the sizes for these rooms: HIVE Mini 6 177 ft³–318 ft³; HIVE Mini 9 283 ft³–459 ft³; HIVE Mini 11 353 ft³–565 ft³; HIVE 12 424 ft³–636 ft³; HIVE 15 530 ft³–812 ft³; HIVE 18 636 ft³–989 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.
What fuse or breaker does the HUUM Hive need?
It depends on the size and your supply: HIVE Mini 6: 1~ 240 V: 25 A (30 A); HIVE Mini 9: 1~ 240 V: 37.5 A (50 A); HIVE Mini 11: 1~ 240 V: 44.2 A (50 A); HIVE 12: 1~ 240 V: 50 A (2 × 30 A); HIVE 15: 1~ 240 V: 62.5 A (2 × 50 A); HIVE 18: 1~ 240 V: 75 A (2 × 50 A). A licensed electrician sizes the circuit from the heater's manual and local rules.
How long does the HUUM Hive take to heat up?
In a well-insulated indoor room at the middle of each size's range, our heat model gives: HIVE Mini 6 85–115 min; HIVE Mini 9 60–80 min; HIVE Mini 11 55–75 min; HIVE 12 70–100 min; HIVE 15 60–80 min; HIVE 18 55–70 min to reach 176 °F. Outdoor saunas, glass and cold weather take longer.
How many stones does the HUUM Hive take?
As stated by HUUM: HIVE Mini 6 331 lb; HIVE Mini 9 331 lb; HIVE Mini 11 331 lb; HIVE 12 551 lb; HIVE 15 551 lb; HIVE 18 551 lb. Use the stone size the manual specifies and re-stack the stones at least once a year, replacing crumbled ones.