Saunum
Saunum SPA Session sauna heater
Saunum makes the SPA Session in 2 sizes, from 6 to 9 kW, for saunas of 177 ft³ to 424 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 18, 2026
Output
6–9 kW
Rooms
177 ft³–424 ft³
Stones
–
Sizes
2
Which size fits your sauna?
Your room's effective volume
247 ft³
Best fit: 6 kW
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 |
|---|---|---|---|---|---|
| SPA Session 6 kW4745090014624 | 6 kW | 177 ft³–318 ft³ | – | 30–40 min | $1.01 |
| SPA Session 9 kW4745090014617 | 9 kW | 318 ft³–424 ft³ | – | 25–35 min | $1.44 |
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
| Output | three-phase 400 V (per phase) | single-phase 230 V |
|---|---|---|
| 6 kW | 8.7 A | 26.1 A |
| 9 kW | 13 A | 39.1 A |
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
- SPA Session 6 kW€3,822 at esaunashop.com (2026-10-18)
- SPA Session 9 kW€3,822 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/electric-sauna-heater-saunum-spa-session-6-5kwdealer · read 2026-10-18
- esaunashop.com/electric-sauna-heater-saunum-spa-session-9-5kwdealer · read 2026-10-18
Other heaters for the same rooms
Questions and answers
What size sauna does the Saunum SPA Session heat?
Saunum rates the sizes for these rooms: SPA Session 6 kW 177 ft³–318 ft³; SPA Session 9 kW 318 ft³–424 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 Saunum SPA Session need?
It depends on the size and your supply: SPA Session 6 kW: 3~ 400 V: 8.7 A, 1~ 230 V: 26.1 A; SPA Session 9 kW: 3~ 400 V: 13 A, 1~ 230 V: 39.1 A. A licensed electrician sizes the circuit from the heater's manual and local rules.
How long does the Saunum SPA Session take to heat up?
In a well-insulated indoor room at the middle of each size's range, our heat model gives: SPA Session 6 kW 30–40 min; SPA Session 9 kW 25–35 min to reach 176 °F. Outdoor saunas, glass and cold weather take longer.